sarama

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 Go to latest Published: Apr 28, 2024 License: MIT Imports: 52 Imported by: 5

README

sarama

Go Reference OpenSSF Scorecard OpenSSF Best Practices

Sarama is an MIT-licensed Go client library for Apache Kafka.

Getting started

  • API documentation and examples are available via pkg.go.dev.
  • Mocks for testing are available in the mocks subpackage.
  • The examples directory contains more elaborate example applications.
  • The tools directory contains command line tools that can be useful for testing, diagnostics, and instrumentation.

You might also want to look at the Frequently Asked Questions.

Compatibility and API stability

Sarama provides a "2 releases + 2 months" compatibility guarantee: we support the two latest stable releases of Kafka and Go, and we provide a two month grace period for older releases. However, older releases of Kafka are still likely to work.

Sarama follows semantic versioning and provides API stability via the standard Go module version numbering scheme.

A changelog is available here.

Contributing

Documentation

Overview

Package sarama is a pure Go client library for dealing with Apache Kafka (versions 0.8 and later). It includes a high-level API for easily producing and consuming messages, and a low-level API for controlling bytes on the wire when the high-level API is insufficient. Usage examples for the high-level APIs are provided inline with their full documentation.

To produce messages, use either the AsyncProducer or the SyncProducer. The AsyncProducer accepts messages on a channel and produces them asynchronously in the background as efficiently as possible; it is preferred in most cases. The SyncProducer provides a method which will block until Kafka acknowledges the message as produced. This can be useful but comes with two caveats: it will generally be less efficient, and the actual durability guarantees depend on the configured value of `Producer.RequiredAcks`. There are configurations where a message acknowledged by the SyncProducer can still sometimes be lost.

To consume messages, use Consumer or Consumer-Group API.

For lower-level needs, the Broker and Request/Response objects permit precise control over each connection and message sent on the wire; the Client provides higher-level metadata management that is shared between the producers and the consumer. The Request/Response objects and properties are mostly undocumented, as they line up exactly with the protocol fields documented by Kafka at https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol

Metrics are exposed through https://github.com/rcrowley/go-metrics library in a local registry.

Broker related metrics: 

+---------------------------------------------------------+------------+---------------------------------------------------------------+
| Name                                                    | Type       | Description                                                   |
+---------------------------------------------------------+------------+---------------------------------------------------------------+
| incoming-byte-rate                                      | meter      | Bytes/second read off all brokers                             |
| incoming-byte-rate-for-broker-<broker-id>               | meter      | Bytes/second read off a given broker                          |
| outgoing-byte-rate                                      | meter      | Bytes/second written off all brokers                          |
| outgoing-byte-rate-for-broker-<broker-id>               | meter      | Bytes/second written off a given broker                       |
| request-rate                                            | meter      | Requests/second sent to all brokers                           |
| request-rate-for-broker-<broker-id>                     | meter      | Requests/second sent to a given broker                        |
| request-size                                            | histogram  | Distribution of the request size in bytes for all brokers     |
| request-size-for-broker-<broker-id>                     | histogram  | Distribution of the request size in bytes for a given broker  |
| request-latency-in-ms                                   | histogram  | Distribution of the request latency in ms for all brokers     |
| request-latency-in-ms-for-broker-<broker-id>            | histogram  | Distribution of the request latency in ms for a given broker  |
| response-rate                                           | meter      | Responses/second received from all brokers                    |
| response-rate-for-broker-<broker-id>                    | meter      | Responses/second received from a given broker                 |
| response-size                                           | histogram  | Distribution of the response size in bytes for all brokers    |
| response-size-for-broker-<broker-id>                    | histogram  | Distribution of the response size in bytes for a given broker |
| requests-in-flight                                      | counter    | The current number of in-flight requests awaiting a response  |
|                                                         |            | for all brokers                                               |
| requests-in-flight-for-broker-<broker-id>               | counter    | The current number of in-flight requests awaiting a response  |
|                                                         |            | for a given broker                                            |
| protocol-requests-rate-<api-key>          	          | meter      | Number of api requests sent to the brokers for all brokers    |
|                                                         |            | https://kafka.apache.org/protocol.html#protocol_api_keys      |                                        |
| protocol-requests-rate-<api-key>-for-broker-<broker-id> | meter      | Number of packets sent to the brokers by api-key for a given  |
|                                                         |            | broker                                                        |
+---------------------------------------------------------+------------+---------------------------------------------------------------+

Note that we do not gather specific metrics for seed brokers but they are part of the "all brokers" metrics.

Producer related metrics: 

+-------------------------------------------+------------+--------------------------------------------------------------------------------------+
| Name                                      | Type       | Description                                                                          |
+-------------------------------------------+------------+--------------------------------------------------------------------------------------+
| batch-size                                | histogram  | Distribution of the number of bytes sent per partition per request for all topics    |
| batch-size-for-topic-<topic>              | histogram  | Distribution of the number of bytes sent per partition per request for a given topic |
| record-send-rate                          | meter      | Records/second sent to all topics                                                    |
| record-send-rate-for-topic-<topic>        | meter      | Records/second sent to a given topic                                                 |
| records-per-request                       | histogram  | Distribution of the number of records sent per request for all topics                |
| records-per-request-for-topic-<topic>     | histogram  | Distribution of the number of records sent per request for a given topic             |
| compression-ratio                         | histogram  | Distribution of the compression ratio times 100 of record batches for all topics     |
| compression-ratio-for-topic-<topic>       | histogram  | Distribution of the compression ratio times 100 of record batches for a given topic  |
+-------------------------------------------+------------+--------------------------------------------------------------------------------------+

Consumer related metrics: 

+-------------------------------------------+------------+--------------------------------------------------------------------------------------+
| Name                                      | Type       | Description                                                                          |
+-------------------------------------------+------------+--------------------------------------------------------------------------------------+
| consumer-batch-size                       | histogram  | Distribution of the number of messages in a batch                                    |
| consumer-fetch-rate                       | meter      | Fetch requests/second sent to all brokers                                            |
| consumer-fetch-rate-for-broker-<broker>   | meter      | Fetch requests/second sent to a given broker                                         |
| consumer-fetch-rate-for-topic-<topic>     | meter      | Fetch requests/second sent for a given topic                                         |
| consumer-fetch-response-size              | histogram  | Distribution of the fetch response size in bytes                                     |
| consumer-group-join-total-<GroupID>       | counter    | Total count of consumer group join attempts                                          |
| consumer-group-join-failed-<GroupID>      | counter    | Total count of consumer group join failures                                          |
| consumer-group-sync-total-<GroupID>       | counter    | Total count of consumer group sync attempts                                          |
| consumer-group-sync-failed-<GroupID>      | counter    | Total count of consumer group sync failures                                          |
+-------------------------------------------+------------+--------------------------------------------------------------------------------------+

Index

Examples

Constants

View Source 
const (
	// RangeBalanceStrategyName identifies strategies that use the range partition assignment strategy
	RangeBalanceStrategyName = "range"

	// RoundRobinBalanceStrategyName identifies strategies that use the round-robin partition assignment strategy
	RoundRobinBalanceStrategyName = "roundrobin"

	// StickyBalanceStrategyName identifies strategies that use the sticky-partition assignment strategy
	StickyBalanceStrategyName = "sticky"
)
View Source 
const (
	// SASLTypeOAuth represents the SASL/OAUTHBEARER mechanism (Kafka 2.0.0+)
	SASLTypeOAuth = "OAUTHBEARER"
	// SASLTypePlaintext represents the SASL/PLAIN mechanism
	SASLTypePlaintext = "PLAIN"
	// SASLTypeSCRAMSHA256 represents the SCRAM-SHA-256 mechanism.
	SASLTypeSCRAMSHA256 = "SCRAM-SHA-256"
	// SASLTypeSCRAMSHA512 represents the SCRAM-SHA-512 mechanism.
	SASLTypeSCRAMSHA512 = "SCRAM-SHA-512"
	SASLTypeGSSAPI      = "GSSAPI"
	// SASLHandshakeV0 is v0 of the Kafka SASL handshake protocol. Client and
	// server negotiate SASL auth using opaque packets.
	SASLHandshakeV0 = int16(0)
	// SASLHandshakeV1 is v1 of the Kafka SASL handshake protocol. Client and
	// server negotiate SASL by wrapping tokens with Kafka protocol headers.
	SASLHandshakeV1 = int16(1)
	// SASLExtKeyAuth is the reserved extension key name sent as part of the
	// SASL/OAUTHBEARER initial client response
	SASLExtKeyAuth = "auth"
)
View Source 
const (
	// OffsetNewest stands for the log head offset, i.e. the offset that will be
	// assigned to the next message that will be produced to the partition. You
	// can send this to a client's GetOffset method to get this offset, or when
	// calling ConsumePartition to start consuming new messages.
	OffsetNewest int64 = -1
	// OffsetOldest stands for the oldest offset available on the broker for a
	// partition. You can send this to a client's GetOffset method to get this
	// offset, or when calling ConsumePartition to start consuming from the
	// oldest offset that is still available on the broker.
	OffsetOldest int64 = -2
)
View Source 
const (
	TOK_ID_KRB_AP_REQ   = 256
	GSS_API_GENERIC_TAG = 0x60
	KRB5_USER_AUTH      = 1
	KRB5_KEYTAB_AUTH    = 2
	KRB5_CCACHE_AUTH    = 3
	GSS_API_INITIAL     = 1
	GSS_API_VERIFY      = 2
	GSS_API_FINISH      = 3
)
View Source 
const APIKeySASLAuth = 36

APIKeySASLAuth is the API key for the SaslAuthenticate Kafka API

View Source 
const GroupGenerationUndefined = -1

GroupGenerationUndefined is a special value for the group generation field of Offset Commit Requests that should be used when a consumer group does not rely on Kafka for partition management.

View Source 
const MAX_GROUP_INSTANCE_ID_LENGTH = 249
View Source 
const ReceiveTime int64 = -1

ReceiveTime is a special value for the timestamp field of Offset Commit Requests which tells the broker to set the timestamp to the time at which the request was received. The timestamp is only used if message version 1 is used, which requires kafka 0.8.2.

Variables

View Source 
var (
	// Logger is the instance of a StdLogger interface that Sarama writes connection
	// management events to. By default it is set to discard all log messages via io.Discard,
	// but you can set it to redirect wherever you want.
	Logger StdLogger = log.New(io.Discard, "[Sarama] ", log.LstdFlags)

	// PanicHandler is called for recovering from panics spawned internally to the library (and thus
	// not recoverable by the caller's goroutine). Defaults to nil, which means panics are not recovered.
	PanicHandler func(interface{})

	// MaxRequestSize is the maximum size (in bytes) of any request that Sarama will attempt to send. Trying
	// to send a request larger than this will result in an PacketEncodingError. The default of 100 MiB is aligned
	// with Kafka's default `socket.request.max.bytes`, which is the largest request the broker will attempt
	// to process.
	MaxRequestSize int32 = 100 * 1024 * 1024

	// MaxResponseSize is the maximum size (in bytes) of any response that Sarama will attempt to parse. If
	// a broker returns a response message larger than this value, Sarama will return a PacketDecodingError to
	// protect the client from running out of memory. Please note that brokers do not have any natural limit on
	// the size of responses they send. In particular, they can send arbitrarily large fetch responses to consumers
	// (see https://issues.apache.org/jira/browse/KAFKA-2063).
	MaxResponseSize int32 = 100 * 1024 * 1024
)
View Source 
var (
	V0_8_2_0  = newKafkaVersion(0, 8, 2, 0)
	V0_8_2_1  = newKafkaVersion(0, 8, 2, 1)
	V0_8_2_2  = newKafkaVersion(0, 8, 2, 2)
	V0_9_0_0  = newKafkaVersion(0, 9, 0, 0)
	V0_9_0_1  = newKafkaVersion(0, 9, 0, 1)
	V0_10_0_0 = newKafkaVersion(0, 10, 0, 0)
	V0_10_0_1 = newKafkaVersion(0, 10, 0, 1)
	V0_10_1_0 = newKafkaVersion(0, 10, 1, 0)
	V0_10_1_1 = newKafkaVersion(0, 10, 1, 1)
	V0_10_2_0 = newKafkaVersion(0, 10, 2, 0)
	V0_10_2_1 = newKafkaVersion(0, 10, 2, 1)
	V0_10_2_2 = newKafkaVersion(0, 10, 2, 2)
	V0_11_0_0 = newKafkaVersion(0, 11, 0, 0)
	V0_11_0_1 = newKafkaVersion(0, 11, 0, 1)
	V0_11_0_2 = newKafkaVersion(0, 11, 0, 2)
	V1_0_0_0  = newKafkaVersion(1, 0, 0, 0)
	V1_0_1_0  = newKafkaVersion(1, 0, 1, 0)
	V1_0_2_0  = newKafkaVersion(1, 0, 2, 0)
	V1_1_0_0  = newKafkaVersion(1, 1, 0, 0)
	V1_1_1_0  = newKafkaVersion(1, 1, 1, 0)
	V2_0_0_0  = newKafkaVersion(2, 0, 0, 0)
	V2_0_1_0  = newKafkaVersion(2, 0, 1, 0)
	V2_1_0_0  = newKafkaVersion(2, 1, 0, 0)
	V2_1_1_0  = newKafkaVersion(2, 1, 1, 0)
	V2_2_0_0  = newKafkaVersion(2, 2, 0, 0)
	V2_2_1_0  = newKafkaVersion(2, 2, 1, 0)
	V2_2_2_0  = newKafkaVersion(2, 2, 2, 0)
	V2_3_0_0  = newKafkaVersion(2, 3, 0, 0)
	V2_3_1_0  = newKafkaVersion(2, 3, 1, 0)
	V2_4_0_0  = newKafkaVersion(2, 4, 0, 0)
	V2_4_1_0  = newKafkaVersion(2, 4, 1, 0)
	V2_5_0_0  = newKafkaVersion(2, 5, 0, 0)
	V2_5_1_0  = newKafkaVersion(2, 5, 1, 0)
	V2_6_0_0  = newKafkaVersion(2, 6, 0, 0)
	V2_6_1_0  = newKafkaVersion(2, 6, 1, 0)
	V2_6_2_0  = newKafkaVersion(2, 6, 2, 0)
	V2_6_3_0  = newKafkaVersion(2, 6, 3, 0)
	V2_7_0_0  = newKafkaVersion(2, 7, 0, 0)
	V2_7_1_0  = newKafkaVersion(2, 7, 1, 0)
	V2_7_2_0  = newKafkaVersion(2, 7, 2, 0)
	V2_8_0_0  = newKafkaVersion(2, 8, 0, 0)
	V2_8_1_0  = newKafkaVersion(2, 8, 1, 0)
	V2_8_2_0  = newKafkaVersion(2, 8, 2, 0)
	V3_0_0_0  = newKafkaVersion(3, 0, 0, 0)
	V3_0_1_0  = newKafkaVersion(3, 0, 1, 0)
	V3_0_2_0  = newKafkaVersion(3, 0, 2, 0)
	V3_1_0_0  = newKafkaVersion(3, 1, 0, 0)
	V3_1_1_0  = newKafkaVersion(3, 1, 1, 0)
	V3_1_2_0  = newKafkaVersion(3, 1, 2, 0)
	V3_2_0_0  = newKafkaVersion(3, 2, 0, 0)
	V3_2_1_0  = newKafkaVersion(3, 2, 1, 0)
	V3_2_2_0  = newKafkaVersion(3, 2, 2, 0)
	V3_2_3_0  = newKafkaVersion(3, 2, 3, 0)
	V3_3_0_0  = newKafkaVersion(3, 3, 0, 0)
	V3_3_1_0  = newKafkaVersion(3, 3, 1, 0)
	V3_3_2_0  = newKafkaVersion(3, 3, 2, 0)
	V3_4_0_0  = newKafkaVersion(3, 4, 0, 0)
	V3_4_1_0  = newKafkaVersion(3, 4, 1, 0)
	V3_5_0_0  = newKafkaVersion(3, 5, 0, 0)
	V3_5_1_0  = newKafkaVersion(3, 5, 1, 0)
	V3_6_0_0  = newKafkaVersion(3, 6, 0, 0)

	SupportedVersions = []KafkaVersion{
		V0_8_2_0,
		V0_8_2_1,
		V0_8_2_2,
		V0_9_0_0,
		V0_9_0_1,
		V0_10_0_0,
		V0_10_0_1,
		V0_10_1_0,
		V0_10_1_1,
		V0_10_2_0,
		V0_10_2_1,
		V0_10_2_2,
		V0_11_0_0,
		V0_11_0_1,
		V0_11_0_2,
		V1_0_0_0,
		V1_0_1_0,
		V1_0_2_0,
		V1_1_0_0,
		V1_1_1_0,
		V2_0_0_0,
		V2_0_1_0,
		V2_1_0_0,
		V2_1_1_0,
		V2_2_0_0,
		V2_2_1_0,
		V2_2_2_0,
		V2_3_0_0,
		V2_3_1_0,
		V2_4_0_0,
		V2_4_1_0,
		V2_5_0_0,
		V2_5_1_0,
		V2_6_0_0,
		V2_6_1_0,
		V2_6_2_0,
		V2_7_0_0,
		V2_7_1_0,
		V2_8_0_0,
		V2_8_1_0,
		V2_8_2_0,
		V3_0_0_0,
		V3_0_1_0,
		V3_0_2_0,
		V3_1_0_0,
		V3_1_1_0,
		V3_1_2_0,
		V3_2_0_0,
		V3_2_1_0,
		V3_2_2_0,
		V3_2_3_0,
		V3_3_0_0,
		V3_3_1_0,
		V3_3_2_0,
		V3_4_0_0,
		V3_4_1_0,
		V3_5_0_0,
		V3_5_1_0,
		V3_6_0_0,
	}
	MinVersion     = V0_8_2_0
	MaxVersion     = V3_6_0_0
	DefaultVersion = V2_1_0_0
)

Effective constants defining the supported kafka versions.

View Source 
var BalanceStrategyRange = NewBalanceStrategyRange()

Deprecated: use NewBalanceStrategyRange to avoid data race issue

View Source 
var BalanceStrategyRoundRobin = NewBalanceStrategyRoundRobin()

Deprecated: use NewBalanceStrategyRoundRobin to avoid data race issue

View Source 
var BalanceStrategySticky = NewBalanceStrategySticky()

Deprecated: use NewBalanceStrategySticky to avoid data race issue

View Source 
var ErrAddPartitionsToTxn = errors.New("transaction manager: failed to send partitions to transaction")

ErrAddPartitionsToTxn is returned when AddPartitionsToTxn failed multiple times

View Source 
var ErrAlreadyConnected = errors.New("kafka: broker connection already initiated")

ErrAlreadyConnected is the error returned when calling Open() on a Broker that is already connected or connecting.

View Source 
var ErrBrokerNotFound = errors.New("kafka: broker for ID is not found")

ErrBrokerNotFound is the error returned when there's no broker found for the requested ID.

View Source 
var ErrCannotTransitionNilError = errors.New("transaction manager: cannot transition with a nil error")

ErrCannotTransitionNilError when transition is attempted with an nil error.

View Source 
var ErrClosedClient = errors.New("kafka: tried to use a client that was closed")

ErrClosedClient is the error returned when a method is called on a client that has been closed.

View Source 
var ErrClosedConsumerGroup = errors.New("kafka: tried to use a consumer group that was closed")

ErrClosedConsumerGroup is the error returned when a method is called on a consumer group that has been closed.

View Source 
var ErrConsumerOffsetNotAdvanced = errors.New("kafka: consumer offset was not advanced after a RecordBatch")

ErrConsumerOffsetNotAdvanced is returned when a partition consumer didn't advance its offset after parsing a RecordBatch.

View Source 
var ErrControllerNotAvailable = errors.New("kafka: controller is not available")

ErrControllerNotAvailable is returned when server didn't give correct controller id. May be kafka server's version is lower than 0.10.0.0.

View Source 
var ErrCreateACLs = errors.New("kafka server: failed to create one or more ACL rules")

ErrCreateACLs is the type of error returned when ACL creation failed

View Source 
var ErrDeleteRecords = errors.New("kafka server: failed to delete records")

ErrDeleteRecords is the type of error returned when fail to delete the required records

View Source 
var ErrIncompleteResponse = errors.New("kafka: response did not contain all the expected topic/partition blocks")

ErrIncompleteResponse is the error returned when the server returns a syntactically valid response, but it does not contain the expected information.

View Source 
var ErrInsufficientData = errors.New("kafka: insufficient data to decode packet, more bytes expected")

ErrInsufficientData is returned when decoding and the packet is truncated. This can be expected when requesting messages, since as an optimization the server is allowed to return a partial message at the end of the message set.

View Source 
var ErrInvalidPartition = errors.New("kafka: partitioner returned an invalid partition index")

ErrInvalidPartition is the error returned when a partitioner returns an invalid partition index (meaning one outside of the range [0...numPartitions-1]).

View Source 
var ErrMessageTooLarge = errors.New("kafka: message is larger than Consumer.Fetch.Max")

ErrMessageTooLarge is returned when the next message to consume is larger than the configured Consumer.Fetch.Max

View Source 
var ErrNoTopicsToUpdateMetadata = errors.New("kafka: no specific topics to update metadata")

ErrNoTopicsToUpdateMetadata is returned when Meta.Full is set to false but no specific topics were found to update the metadata.

View Source 
var ErrNonTransactedProducer = errors.New("transaction manager: you need to add TransactionalID to producer")

ErrNonTransactedProducer when calling BeginTxn, CommitTxn or AbortTxn on a non transactional producer.

View Source 
var ErrNotConnected = errors.New("kafka: broker not connected")

ErrNotConnected is the error returned when trying to send or call Close() on a Broker that is not connected.

View Source 
var ErrOutOfBrokers = errors.New("kafka: client has run out of available brokers to talk to")

ErrOutOfBrokers is the error returned when the client has run out of brokers to talk to because all of them errored or otherwise failed to respond.

View Source 
var ErrReassignPartitions = errors.New("failed to reassign partitions for topic")

ErrReassignPartitions is returned when altering partition assignments for a topic fails

View Source 
var ErrShuttingDown = errors.New("kafka: message received by producer in process of shutting down")

ErrShuttingDown is returned when a producer receives a message during shutdown.

View Source 
var ErrTransactionNotReady = errors.New("transaction manager: transaction is not ready")

ErrTransactionNotReady when transaction status is invalid for the current action.

View Source 
var ErrTransitionNotAllowed = errors.New("transaction manager: invalid transition attempted")

ErrTransitionNotAllowed when txnmgr state transition is not valid.

View Source 
var ErrTxnOffsetCommit = errors.New("transaction manager: failed to send offsets to transaction")

ErrTxnOffsetCommit is returned when TxnOffsetCommit failed multiple times

View Source 
var ErrTxnUnableToParseResponse = errors.New("transaction manager: unable to parse response")

ErrTxnUnableToParseResponse when response is nil

View Source 
var ErrUnknownScramMechanism = errors.New("kafka: unknown SCRAM mechanism provided")

ErrUnknownScramMechanism is returned when user tries to AlterUserScramCredentials with unknown SCRAM mechanism

View Source 
var GROUP_INSTANCE_ID_REGEXP = regexp.MustCompile(`^[0-9a-zA-Z\._\-]+$`)
View Source 
var MultiErrorFormat multierror.ErrorFormatFunc = func(es []error) string {
	if len(es) == 1 {
		return es[0].Error()
	}

	points := make([]string, len(es))
	for i, err := range es {
		points[i] = fmt.Sprintf("* %s", err)
	}

	return fmt.Sprintf(
		"%d errors occurred:\n\t%s\n",
		len(es), strings.Join(points, "\n\t"))
}

MultiErrorFormat specifies the formatter applied to format multierrors. The default implementation is a condensed version of the hashicorp/go-multierror default one

View Source 
var NoNode = &Broker{id: -1, addr: ":-1"}
View Source 
var NullUUID = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}

Functions

func Wrap 

func Wrap(sentinel error, wrapped ...error) sentinelError

Types

type AbortedTransaction 

type AbortedTransaction struct {
	// ProducerID contains the producer id associated with the aborted transaction.
	ProducerID int64
	// FirstOffset contains the first offset in the aborted transaction.
	FirstOffset int64
}

type AccessToken 

type AccessToken struct {
	// Token is the access token payload.
	Token string
	// Extensions is a optional map of arbitrary key-value pairs that can be
	// sent with the SASL/OAUTHBEARER initial client response. These values are
	// ignored by the SASL server if they are unexpected. This feature is only
	// supported by Kafka >= 2.1.0.
	Extensions map[string]string
}

AccessToken contains an access token used to authenticate a SASL/OAUTHBEARER client along with associated metadata.

type AccessTokenProvider 

type AccessTokenProvider interface {
	// Token returns an access token. The implementation should ensure token
	// reuse so that multiple calls at connect time do not create multiple
	// tokens. The implementation should also periodically refresh the token in
	// order to guarantee that each call returns an unexpired token.  This
	// method should not block indefinitely--a timeout error should be returned
	// after a short period of inactivity so that the broker connection logic
	// can log debugging information and retry.
	Token() (*AccessToken, error)
}

AccessTokenProvider is the interface that encapsulates how implementors can generate access tokens for Kafka broker authentication.

type Acl 

type Acl struct {
	Principal      string
	Host           string
	Operation      AclOperation
	PermissionType AclPermissionType
}

Acl holds information about acl type

type AclCreation 

type AclCreation struct {
	Resource
	Acl
}

AclCreation is a wrapper around Resource and Acl type

type AclCreationResponse 

type AclCreationResponse struct {
	Err    KError
	ErrMsg *string
}

AclCreationResponse is an acl creation response type

type AclFilter 

type AclFilter struct {
	Version                   int
	ResourceType              AclResourceType
	ResourceName              *string
	ResourcePatternTypeFilter AclResourcePatternType
	Principal                 *string
	Host                      *string
	Operation                 AclOperation
	PermissionType            AclPermissionType
}

type AclOperation 

type AclOperation int
const (
	AclOperationUnknown AclOperation = iota
	AclOperationAny
	AclOperationAll
	AclOperationRead
	AclOperationWrite
	AclOperationCreate
	AclOperationDelete
	AclOperationAlter
	AclOperationDescribe
	AclOperationClusterAction
	AclOperationDescribeConfigs
	AclOperationAlterConfigs
	AclOperationIdempotentWrite
)

ref: https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/acl/AclOperation.java

func (*AclOperation) MarshalText 

func (a *AclOperation) MarshalText() ([]byte, error)

MarshalText returns the text form of the AclOperation (name without prefix)

func (*AclOperation) String 

func (a *AclOperation) String() string

func (*AclOperation) UnmarshalText 

func (a *AclOperation) UnmarshalText(text []byte) error

UnmarshalText takes a text representation of the operation and converts it to an AclOperation

type AclPermissionType 

type AclPermissionType int
const (
	AclPermissionUnknown AclPermissionType = iota
	AclPermissionAny
	AclPermissionDeny
	AclPermissionAllow
)

ref: https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/acl/AclPermissionType.java

func (*AclPermissionType) MarshalText 

func (a *AclPermissionType) MarshalText() ([]byte, error)

MarshalText returns the text form of the AclPermissionType (name without prefix)

func (*AclPermissionType) String 

func (a *AclPermissionType) String() string

func (*AclPermissionType) UnmarshalText 

func (a *AclPermissionType) UnmarshalText(text []byte) error

UnmarshalText takes a text representation of the permission type and converts it to an AclPermissionType

type AclResourcePatternType 

type AclResourcePatternType int
const (
	AclPatternUnknown AclResourcePatternType = iota
	AclPatternAny
	AclPatternMatch
	AclPatternLiteral
	AclPatternPrefixed
)

ref: https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/resource/PatternType.java

func (*AclResourcePatternType) MarshalText 

func (a *AclResourcePatternType) MarshalText() ([]byte, error)

MarshalText returns the text form of the AclResourcePatternType (name without prefix)

func (*AclResourcePatternType) String 

func (a *AclResourcePatternType) String() string

func (*AclResourcePatternType) UnmarshalText 

func (a *AclResourcePatternType) UnmarshalText(text []byte) error

UnmarshalText takes a text representation of the resource pattern type and converts it to an AclResourcePatternType

type AclResourceType 

type AclResourceType int
const (
	AclResourceUnknown AclResourceType = iota
	AclResourceAny
	AclResourceTopic
	AclResourceGroup
	AclResourceCluster
	AclResourceTransactionalID
	AclResourceDelegationToken
)

ref: https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/resource/ResourceType.java

func (*AclResourceType) MarshalText 

func (a *AclResourceType) MarshalText() ([]byte, error)

MarshalText returns the text form of the AclResourceType (name without prefix)

func (*AclResourceType) String 

func (a *AclResourceType) String() string

func (*AclResourceType) UnmarshalText 

func (a *AclResourceType) UnmarshalText(text []byte) error

UnmarshalText takes a text representation of the resource type and converts it to an AclResourceType

type AddOffsetsToTxnRequest 

type AddOffsetsToTxnRequest struct {
	Version         int16
	TransactionalID string
	ProducerID      int64
	ProducerEpoch   int16
	GroupID         string
}

AddOffsetsToTxnRequest adds offsets to a transaction request

type AddOffsetsToTxnResponse 

type AddOffsetsToTxnResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Err          KError
}

AddOffsetsToTxnResponse is a response type for adding offsets to txns

type AddPartitionsToTxnRequest 

type AddPartitionsToTxnRequest struct {
	Version         int16
	TransactionalID string
	ProducerID      int64
	ProducerEpoch   int16
	TopicPartitions map[string][]int32
}

AddPartitionsToTxnRequest is a add partition request

type AddPartitionsToTxnResponse 

type AddPartitionsToTxnResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Errors       map[string][]*PartitionError
}

AddPartitionsToTxnResponse is a partition errors to transaction type

type AlterClientQuotasEntry 

type AlterClientQuotasEntry struct {
	Entity []QuotaEntityComponent // The quota entity to alter.
	Ops    []ClientQuotasOp       // An individual quota configuration entry to alter.
}

type AlterClientQuotasEntryResponse 

type AlterClientQuotasEntryResponse struct {
	ErrorCode KError                 // The error code, or `0` if the quota alteration succeeded.
	ErrorMsg  *string                // The error message, or `null` if the quota alteration succeeded.
	Entity    []QuotaEntityComponent // The quota entity altered.
}

type AlterClientQuotasRequest 

type AlterClientQuotasRequest struct {
	Version      int16
	Entries      []AlterClientQuotasEntry // The quota configuration entries to alter.
	ValidateOnly bool                     // Whether the alteration should be validated, but not performed.
}

type AlterClientQuotasResponse 

type AlterClientQuotasResponse struct {
	Version      int16
	ThrottleTime time.Duration                    // The duration in milliseconds for which the request was throttled due to a quota violation, or zero if the request did not violate any quota.
	Entries      []AlterClientQuotasEntryResponse // The quota configuration entries altered.
}

type AlterConfigError 

type AlterConfigError struct {
	Err    KError
	ErrMsg string
}

func (*AlterConfigError) Error 

func (c *AlterConfigError) Error() string

type AlterConfigsRequest 

type AlterConfigsRequest struct {
	Version      int16
	Resources    []*AlterConfigsResource
	ValidateOnly bool
}

AlterConfigsRequest is an alter config request type

type AlterConfigsResource 

type AlterConfigsResource struct {
	Type          ConfigResourceType
	Name          string
	ConfigEntries map[string]*string
}

AlterConfigsResource is an alter config resource type

type AlterConfigsResourceResponse 

type AlterConfigsResourceResponse struct {
	ErrorCode int16
	ErrorMsg  string
	Type      ConfigResourceType
	Name      string
}

AlterConfigsResourceResponse is a response type for alter config resource

type AlterConfigsResponse 

type AlterConfigsResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Resources    []*AlterConfigsResourceResponse
}

AlterConfigsResponse is a response type for alter config

type AlterPartitionReassignmentsRequest 

type AlterPartitionReassignmentsRequest struct {
	TimeoutMs int32

	Version int16
	// contains filtered or unexported fields
}

func (*AlterPartitionReassignmentsRequest) AddBlock 

func (r *AlterPartitionReassignmentsRequest) AddBlock(topic string, partitionID int32, replicas []int32)

type AlterPartitionReassignmentsResponse 

type AlterPartitionReassignmentsResponse struct {
	Version        int16
	ThrottleTimeMs int32
	ErrorCode      KError
	ErrorMessage   *string
	Errors         map[string]map[int32]*alterPartitionReassignmentsErrorBlock
}

func (*AlterPartitionReassignmentsResponse) AddError 

func (r *AlterPartitionReassignmentsResponse) AddError(topic string, partition int32, kerror KError, message *string)

type AlterUserScramCredentialsDelete 

type AlterUserScramCredentialsDelete struct {
	Name      string
	Mechanism ScramMechanismType
}

type AlterUserScramCredentialsRequest 

type AlterUserScramCredentialsRequest struct {
	Version int16

	// Deletions represent list of SCRAM credentials to remove
	Deletions []AlterUserScramCredentialsDelete

	// Upsertions represent list of SCRAM credentials to update/insert
	Upsertions []AlterUserScramCredentialsUpsert
}

type AlterUserScramCredentialsResponse 

type AlterUserScramCredentialsResponse struct {
	Version int16

	ThrottleTime time.Duration

	Results []*AlterUserScramCredentialsResult
}

type AlterUserScramCredentialsResult 

type AlterUserScramCredentialsResult struct {
	User string

	ErrorCode    KError
	ErrorMessage *string
}

type AlterUserScramCredentialsUpsert 

type AlterUserScramCredentialsUpsert struct {
	Name       string
	Mechanism  ScramMechanismType
	Iterations int32
	Salt       []byte

	// This field is never transmitted over the wire
	// @see: https://tools.ietf.org/html/rfc5802
	Password []byte
	// contains filtered or unexported fields
}

type ApiVersionsRequest 

type ApiVersionsRequest struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ClientSoftwareName contains the name of the client.
	ClientSoftwareName string
	// ClientSoftwareVersion contains the version of the client.
	ClientSoftwareVersion string
}

type ApiVersionsResponse 

type ApiVersionsResponse struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ErrorCode contains the top-level error code.
	ErrorCode int16
	// ApiKeys contains the APIs supported by the broker.
	ApiKeys []ApiVersionsResponseKey
	// ThrottleTimeMs contains the duration in milliseconds for which the request was throttled due to a quota violation, or zero if the request did not violate any quota.
	ThrottleTimeMs int32
}

type ApiVersionsResponseKey 

type ApiVersionsResponseKey struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ApiKey contains the API index.
	ApiKey int16
	// MinVersion contains the minimum supported version, inclusive.
	MinVersion int16
	// MaxVersion contains the maximum supported version, inclusive.
	MaxVersion int16
}

ApiVersionsResponseKey contains the APIs supported by the broker.

type AsyncProducer 

type AsyncProducer interface {
	// AsyncClose triggers a shutdown of the producer. The shutdown has completed
	// when both the Errors and Successes channels have been closed. When calling
	// AsyncClose, you *must* continue to read from those channels in order to
	// drain the results of any messages in flight.
	AsyncClose()

	// Close shuts down the producer and waits for any buffered messages to be
	// flushed. You must call this function before a producer object passes out of
	// scope, as it may otherwise leak memory. You must call this before process
	// shutting down, or you may lose messages. You must call this before calling
	// Close on the underlying client.
	Close() error

	// Input is the input channel for the user to write messages to that they
	// wish to send.
	Input() chan<- *ProducerMessage

	// Successes is the success output channel back to the user when Return.Successes is
	// enabled. If Return.Successes is true, you MUST read from this channel or the
	// Producer will deadlock. It is suggested that you send and read messages
	// together in a single select statement.
	Successes() <-chan *ProducerMessage

	// Errors is the error output channel back to the user. You MUST read from this
	// channel or the Producer will deadlock when the channel is full. Alternatively,
	// you can set Producer.Return.Errors in your config to false, which prevents
	// errors to be returned.
	Errors() <-chan *ProducerError

	// IsTransactional return true when current producer is transactional.
	IsTransactional() bool

	// TxnStatus return current producer transaction status.
	TxnStatus() ProducerTxnStatusFlag

	// BeginTxn mark current transaction as ready.
	BeginTxn() error

	// CommitTxn commit current transaction.
	CommitTxn() error

	// AbortTxn abort current transaction.
	AbortTxn() error

	// AddOffsetsToTxn add associated offsets to current transaction.
	AddOffsetsToTxn(offsets map[string][]*PartitionOffsetMetadata, groupId string) error

	// AddMessageToTxn add message offsets to current transaction.
	AddMessageToTxn(msg *ConsumerMessage, groupId string, metadata *string) error
}

AsyncProducer publishes Kafka messages using a non-blocking API. It routes messages to the correct broker for the provided topic-partition, refreshing metadata as appropriate, and parses responses for errors. You must read from the Errors() channel or the producer will deadlock. You must call Close() or AsyncClose() on a producer to avoid leaks and message lost: it will not be garbage-collected automatically when it passes out of scope and buffered messages may not be flushed.

Example (Goroutines)

This example shows how to use the producer with separate goroutines reading from the Successes and Errors channels. Note that in order for the Successes channel to be populated, you have to set config.Producer.Return.Successes to true. 

config := NewTestConfig()
config.Producer.Return.Successes = true
producer, err := NewAsyncProducer([]string{"localhost:9092"}, config)
if err != nil {
	panic(err)
}

// Trap SIGINT to trigger a graceful shutdown.
signals := make(chan os.Signal, 1)
signal.Notify(signals, os.Interrupt)

var (
	wg                                  sync.WaitGroup
	enqueued, successes, producerErrors int
)

wg.Add(1)
go func() {
	defer wg.Done()
	for range producer.Successes() {
		successes++
	}
}()

wg.Add(1)
go func() {
	defer wg.Done()
	for err := range producer.Errors() {
		log.Println(err)
		producerErrors++
	}
}()

ProducerLoop:
for {
	message := &ProducerMessage{Topic: "my_topic", Value: StringEncoder("testing 123")}
	select {
	case producer.Input() <- message:
		enqueued++

	case <-signals:
		producer.AsyncClose() // Trigger a shutdown of the producer.
		break ProducerLoop
	}
}

wg.Wait()

log.Printf("Successfully produced: %d; errors: %d\n", successes, producerErrors)

Output:
Example (Select)

This example shows how to use the producer while simultaneously reading the Errors channel to know about any failures. 

producer, err := NewAsyncProducer([]string{"localhost:9092"}, nil)
if err != nil {
	panic(err)
}

defer func() {
	if err := producer.Close(); err != nil {
		log.Fatalln(err)
	}
}()

// Trap SIGINT to trigger a shutdown.
signals := make(chan os.Signal, 1)
signal.Notify(signals, os.Interrupt)

var enqueued, producerErrors int
ProducerLoop:
for {
	select {
	case producer.Input() <- &ProducerMessage{Topic: "my_topic", Key: nil, Value: StringEncoder("testing 123")}:
		enqueued++
	case err := <-producer.Errors():
		log.Println("Failed to produce message", err)
		producerErrors++
	case <-signals:
		break ProducerLoop
	}
}

log.Printf("Enqueued: %d; errors: %d\n", enqueued, producerErrors)

Output:

func NewAsyncProducer 

func NewAsyncProducer(addrs []string, conf *Config) (AsyncProducer, error)

NewAsyncProducer creates a new AsyncProducer using the given broker addresses and configuration.

func NewAsyncProducerFromClient 

func NewAsyncProducerFromClient(client Client) (AsyncProducer, error)

NewAsyncProducerFromClient creates a new Producer using the given client. It is still necessary to call Close() on the underlying client when shutting down this producer.

type BalanceStrategy 

type BalanceStrategy interface {
	// Name uniquely identifies the strategy.
	Name() string

	// Plan accepts a map of `memberID -> metadata` and a map of `topic -> partitions`
	// and returns a distribution plan.
	Plan(members map[string]ConsumerGroupMemberMetadata, topics map[string][]int32) (BalanceStrategyPlan, error)

	// AssignmentData returns the serialized assignment data for the specified
	// memberID
	AssignmentData(memberID string, topics map[string][]int32, generationID int32) ([]byte, error)
}

BalanceStrategy is used to balance topics and partitions across members of a consumer group

func NewBalanceStrategyRange 

func NewBalanceStrategyRange() BalanceStrategy

NewBalanceStrategyRange returns a range balance strategy, which is the default and assigns partitions as ranges to consumer group members. This follows the same logic as https://kafka.apache.org/31/javadoc/org/apache/kafka/clients/consumer/RangeAssignor.html

Example with two topics T1 and T2 with six partitions each (0..5) and two members (M1, M2): 

M1: {T1: [0, 1, 2], T2: [0, 1, 2]}
M2: {T1: [3, 4, 5], T2: [3, 4, 5]}

func NewBalanceStrategyRoundRobin 

func NewBalanceStrategyRoundRobin() BalanceStrategy

NewBalanceStrategyRoundRobin returns a round-robin balance strategy, which assigns partitions to members in alternating order. For example, there are two topics (t0, t1) and two consumer (m0, m1), and each topic has three partitions (p0, p1, p2): M0: [t0p0, t0p2, t1p1] M1: [t0p1, t1p0, t1p2]

func NewBalanceStrategySticky 

func NewBalanceStrategySticky() BalanceStrategy

NewBalanceStrategySticky returns a sticky balance strategy, which assigns partitions to members with an attempt to preserve earlier assignments while maintain a balanced partition distribution. Example with topic T with six partitions (0..5) and two members (M1, M2): 

M1: {T: [0, 2, 4]}
M2: {T: [1, 3, 5]}

On reassignment with an additional consumer, you might get an assignment plan like: 

M1: {T: [0, 2]}
M2: {T: [1, 3]}
M3: {T: [4, 5]}

type BalanceStrategyPlan 

type BalanceStrategyPlan map[string]map[string][]int32

BalanceStrategyPlan is the results of any BalanceStrategy.Plan attempt. It contains an allocation of topic/partitions by memberID in the form of a `memberID -> topic -> partitions` map.

func (BalanceStrategyPlan) Add 

func (p BalanceStrategyPlan) Add(memberID, topic string, partitions ...int32)

Add assigns a topic with a number partitions to a member.

type Broker 

type Broker struct {
	// contains filtered or unexported fields
}

Broker represents a single Kafka broker connection. All operations on this object are entirely concurrency-safe.

Example 
broker := NewBroker("localhost:9092")
err := broker.Open(nil)
if err != nil {
	panic(err)
}

request := MetadataRequest{Topics: []string{"myTopic"}}
response, err := broker.GetMetadata(&request)
if err != nil {
	_ = broker.Close()
	panic(err)
}

fmt.Println("There are", len(response.Topics), "topics active in the cluster.")

if err = broker.Close(); err != nil {
	panic(err)
}

Output:

func NewBroker 

func NewBroker(addr string) *Broker

NewBroker creates and returns a Broker targeting the given host:port address. This does not attempt to actually connect, you have to call Open() for that.

func (*Broker) AddOffsetsToTxn 

func (b *Broker) AddOffsetsToTxn(request *AddOffsetsToTxnRequest) (*AddOffsetsToTxnResponse, error)

AddOffsetsToTxn sends a request to add offsets to txn and returns a response or error

func (*Broker) AddPartitionsToTxn 

func (b *Broker) AddPartitionsToTxn(request *AddPartitionsToTxnRequest) (*AddPartitionsToTxnResponse, error)

AddPartitionsToTxn send a request to add partition to txn and returns a response or error

func (*Broker) Addr 

func (b *Broker) Addr() string

Addr returns the broker address as either retrieved from Kafka's metadata or passed to NewBroker.

func (*Broker) AlterClientQuotas 

func (b *Broker) AlterClientQuotas(request *AlterClientQuotasRequest) (*AlterClientQuotasResponse, error)

AlterClientQuotas sends a request to alter the broker's quotas

func (*Broker) AlterConfigs 

func (b *Broker) AlterConfigs(request *AlterConfigsRequest) (*AlterConfigsResponse, error)

AlterConfigs sends a request to alter config and return a response or error

func (*Broker) AlterPartitionReassignments 

func (b *Broker) AlterPartitionReassignments(request *AlterPartitionReassignmentsRequest) (*AlterPartitionReassignmentsResponse, error)

AlterPartitionReassignments sends a alter partition reassignments request and returns alter partition reassignments response

func (*Broker) AlterUserScramCredentials 

func (b *Broker) AlterUserScramCredentials(req *AlterUserScramCredentialsRequest) (*AlterUserScramCredentialsResponse, error)

func (*Broker) ApiVersions 

func (b *Broker) ApiVersions(request *ApiVersionsRequest) (*ApiVersionsResponse, error)

ApiVersions return api version response or error

func (*Broker) AsyncProduce 

func (b *Broker) AsyncProduce(request *ProduceRequest, cb ProduceCallback) error

AsyncProduce sends a produce request and eventually call the provided callback with a produce response or an error.

Waiting for the response is generally not blocking on the contrary to using Produce. If the maximum number of in flight request configured is reached then the request will be blocked till a previous response is received.

When configured with RequiredAcks == NoResponse, the callback will not be invoked. If an error is returned because the request could not be sent then the callback will not be invoked either.

Make sure not to Close the broker in the callback as it will lead to a deadlock.

func (*Broker) Close 

func (b *Broker) Close() error

Close closes the broker resources

func (*Broker) CommitOffset 

func (b *Broker) CommitOffset(request *OffsetCommitRequest) (*OffsetCommitResponse, error)

CommitOffset return an Offset commit response or error

func (*Broker) Connected 

func (b *Broker) Connected() (bool, error)

Connected returns true if the broker is connected and false otherwise. If the broker is not connected but it had tried to connect, the error from that connection attempt is also returned.

func (*Broker) CreateAcls 

func (b *Broker) CreateAcls(request *CreateAclsRequest) (*CreateAclsResponse, error)

CreateAcls sends a create acl request and returns a response or error

func (*Broker) CreatePartitions 

func (b *Broker) CreatePartitions(request *CreatePartitionsRequest) (*CreatePartitionsResponse, error)

CreatePartitions sends a create partition request and returns create partitions response or error

func (*Broker) CreateTopics 

func (b *Broker) CreateTopics(request *CreateTopicsRequest) (*CreateTopicsResponse, error)

CreateTopics send a create topic request and returns create topic response

func (*Broker) DeleteAcls 

func (b *Broker) DeleteAcls(request *DeleteAclsRequest) (*DeleteAclsResponse, error)

DeleteAcls sends a delete acl request and returns a response or error

func (*Broker) DeleteGroups 

func (b *Broker) DeleteGroups(request *DeleteGroupsRequest) (*DeleteGroupsResponse, error)

DeleteGroups sends a request to delete groups and returns a response or error

func (*Broker) DeleteOffsets 

func (b *Broker) DeleteOffsets(request *DeleteOffsetsRequest) (*DeleteOffsetsResponse, error)

DeleteOffsets sends a request to delete group offsets and returns a response or error

func (*Broker) DeleteRecords 

func (b *Broker) DeleteRecords(request *DeleteRecordsRequest) (*DeleteRecordsResponse, error)

DeleteRecords send a request to delete records and return delete record response or error

func (*Broker) DeleteTopics 

func (b *Broker) DeleteTopics(request *DeleteTopicsRequest) (*DeleteTopicsResponse, error)

DeleteTopics sends a delete topic request and returns delete topic response

func (*Broker) DescribeAcls 

func (b *Broker) DescribeAcls(request *DescribeAclsRequest) (*DescribeAclsResponse, error)

DescribeAcls sends a describe acl request and returns a response or error

func (*Broker) DescribeClientQuotas 

func (b *Broker) DescribeClientQuotas(request *DescribeClientQuotasRequest) (*DescribeClientQuotasResponse, error)

DescribeClientQuotas sends a request to get the broker's quotas

func (*Broker) DescribeConfigs 

func (b *Broker) DescribeConfigs(request *DescribeConfigsRequest) (*DescribeConfigsResponse, error)

DescribeConfigs sends a request to describe config and returns a response or error

func (*Broker) DescribeGroups 

func (b *Broker) DescribeGroups(request *DescribeGroupsRequest) (*DescribeGroupsResponse, error)

DescribeGroups return describe group response or error

func (*Broker) DescribeLogDirs 

func (b *Broker) DescribeLogDirs(request *DescribeLogDirsRequest) (*DescribeLogDirsResponse, error)

DescribeLogDirs sends a request to get the broker's log dir paths and sizes

func (*Broker) DescribeUserScramCredentials 

func (b *Broker) DescribeUserScramCredentials(req *DescribeUserScramCredentialsRequest) (*DescribeUserScramCredentialsResponse, error)

DescribeUserScramCredentials sends a request to get SCRAM users

func (*Broker) EndTxn 

func (b *Broker) EndTxn(request *EndTxnRequest) (*EndTxnResponse, error)

EndTxn sends a request to end txn and returns a response or error

func (*Broker) Fetch 

func (b *Broker) Fetch(request *FetchRequest) (*FetchResponse, error)

Fetch returns a FetchResponse or error

func (*Broker) FetchOffset 

func (b *Broker) FetchOffset(request *OffsetFetchRequest) (*OffsetFetchResponse, error)

FetchOffset returns an offset fetch response or error

func (*Broker) FindCoordinator 

func (b *Broker) FindCoordinator(request *FindCoordinatorRequest) (*FindCoordinatorResponse, error)

FindCoordinator sends a find coordinate request and returns a response or error

func (*Broker) GetAvailableOffsets 

func (b *Broker) GetAvailableOffsets(request *OffsetRequest) (*OffsetResponse, error)

GetAvailableOffsets return an offset response or error

func (*Broker) GetConsumerMetadata 

func (b *Broker) GetConsumerMetadata(request *ConsumerMetadataRequest) (*ConsumerMetadataResponse, error)

GetConsumerMetadata send a consumer metadata request and returns a consumer metadata response or error

func (*Broker) GetMetadata 

func (b *Broker) GetMetadata(request *MetadataRequest) (*MetadataResponse, error)

GetMetadata send a metadata request and returns a metadata response or error

func (*Broker) Heartbeat 

func (b *Broker) Heartbeat(request *HeartbeatRequest) (*HeartbeatResponse, error)

Heartbeat returns a heartbeat response or error

func (*Broker) ID 

func (b *Broker) ID() int32

ID returns the broker ID retrieved from Kafka's metadata, or -1 if that is not known.

func (*Broker) IncrementalAlterConfigs 

func (b *Broker) IncrementalAlterConfigs(request *IncrementalAlterConfigsRequest) (*IncrementalAlterConfigsResponse, error)

IncrementalAlterConfigs sends a request to incremental alter config and return a response or error

func (*Broker) InitProducerID 

func (b *Broker) InitProducerID(request *InitProducerIDRequest) (*InitProducerIDResponse, error)

InitProducerID sends an init producer request and returns a response or error

func (*Broker) JoinGroup 

func (b *Broker) JoinGroup(request *JoinGroupRequest) (*JoinGroupResponse, error)

JoinGroup returns a join group response or error

func (*Broker) LeaveGroup 

func (b *Broker) LeaveGroup(request *LeaveGroupRequest) (*LeaveGroupResponse, error)

LeaveGroup return a leave group response or error

func (*Broker) ListGroups 

func (b *Broker) ListGroups(request *ListGroupsRequest) (*ListGroupsResponse, error)

ListGroups return a list group response or error

func (*Broker) ListPartitionReassignments 

func (b *Broker) ListPartitionReassignments(request *ListPartitionReassignmentsRequest) (*ListPartitionReassignmentsResponse, error)

ListPartitionReassignments sends a list partition reassignments request and returns list partition reassignments response

func (*Broker) Open 

func (b *Broker) Open(conf *Config) error

Open tries to connect to the Broker if it is not already connected or connecting, but does not block waiting for the connection to complete. This means that any subsequent operations on the broker will block waiting for the connection to succeed or fail. To get the effect of a fully synchronous Open call, follow it by a call to Connected(). The only errors Open will return directly are ConfigurationError or AlreadyConnected. If conf is nil, the result of NewConfig() is used.

func (*Broker) Produce 

func (b *Broker) Produce(request *ProduceRequest) (*ProduceResponse, error)

Produce returns a produce response or error

func (*Broker) Rack 

func (b *Broker) Rack() string

Rack returns the broker's rack as retrieved from Kafka's metadata or the empty string if it is not known. The returned value corresponds to the broker's broker.rack configuration setting. Requires protocol version to be at least v0.10.0.0.

func (*Broker) ResponseSize 

func (b *Broker) ResponseSize() int

func (*Broker) SyncGroup 

func (b *Broker) SyncGroup(request *SyncGroupRequest) (*SyncGroupResponse, error)

SyncGroup returns a sync group response or error

func (*Broker) TLSConnectionState 

func (b *Broker) TLSConnectionState() (state tls.ConnectionState, ok bool)

TLSConnectionState returns the client's TLS connection state. The second return value is false if this is not a tls connection or the connection has not yet been established.

func (*Broker) TxnOffsetCommit 

func (b *Broker) TxnOffsetCommit(request *TxnOffsetCommitRequest) (*TxnOffsetCommitResponse, error)

TxnOffsetCommit sends a request to commit transaction offsets and returns a response or error

type BuildSpnFunc 

type BuildSpnFunc func(serviceName, host string) string

type ByteEncoder 

type ByteEncoder []byte

ByteEncoder implements the Encoder interface for Go byte slices so that they can be used as the Key or Value in a ProducerMessage.

func (ByteEncoder) Encode 

func (b ByteEncoder) Encode() ([]byte, error)

func (ByteEncoder) Length 

func (b ByteEncoder) Length() int

type Client 

type Client interface {
	// Config returns the Config struct of the client. This struct should not be
	// altered after it has been created.
	Config() *Config

	// Controller returns the cluster controller broker. It will return a
	// locally cached value if it's available. You can call RefreshController
	// to update the cached value. Requires Kafka 0.10 or higher.
	Controller() (*Broker, error)

	// RefreshController retrieves the cluster controller from fresh metadata
	// and stores it in the local cache. Requires Kafka 0.10 or higher.
	RefreshController() (*Broker, error)

	// Brokers returns the current set of active brokers as retrieved from cluster metadata.
	Brokers() []*Broker

	// Broker returns the active Broker if available for the broker ID.
	Broker(brokerID int32) (*Broker, error)

	// Topics returns the set of available topics as retrieved from cluster metadata.
	Topics() ([]string, error)

	// Partitions returns the sorted list of all partition IDs for the given topic.
	Partitions(topic string) ([]int32, error)

	// WritablePartitions returns the sorted list of all writable partition IDs for
	// the given topic, where "writable" means "having a valid leader accepting
	// writes".
	WritablePartitions(topic string) ([]int32, error)

	// Leader returns the broker object that is the leader of the current
	// topic/partition, as determined by querying the cluster metadata.
	Leader(topic string, partitionID int32) (*Broker, error)

	// LeaderAndEpoch returns the leader and its epoch for the current
	// topic/partition, as determined by querying the cluster metadata.
	LeaderAndEpoch(topic string, partitionID int32) (*Broker, int32, error)

	// Replicas returns the set of all replica IDs for the given partition.
	Replicas(topic string, partitionID int32) ([]int32, error)

	// InSyncReplicas returns the set of all in-sync replica IDs for the given
	// partition. In-sync replicas are replicas which are fully caught up with
	// the partition leader.
	InSyncReplicas(topic string, partitionID int32) ([]int32, error)

	// OfflineReplicas returns the set of all offline replica IDs for the given
	// partition. Offline replicas are replicas which are offline
	OfflineReplicas(topic string, partitionID int32) ([]int32, error)

	// RefreshBrokers takes a list of addresses to be used as seed brokers.
	// Existing broker connections are closed and the updated list of seed brokers
	// will be used for the next metadata fetch.
	RefreshBrokers(addrs []string) error

	// RefreshMetadata takes a list of topics and queries the cluster to refresh the
	// available metadata for those topics. If no topics are provided, it will refresh
	// metadata for all topics.
	RefreshMetadata(topics ...string) error

	// GetOffset queries the cluster to get the most recent available offset at the
	// given time (in milliseconds) on the topic/partition combination.
	// Time should be OffsetOldest for the earliest available offset,
	// OffsetNewest for the offset of the message that will be produced next, or a time.
	GetOffset(topic string, partitionID int32, time int64) (int64, error)

	// Coordinator returns the coordinating broker for a consumer group. It will
	// return a locally cached value if it's available. You can call
	// RefreshCoordinator to update the cached value. This function only works on
	// Kafka 0.8.2 and higher.
	Coordinator(consumerGroup string) (*Broker, error)

	// RefreshCoordinator retrieves the coordinator for a consumer group and stores it
	// in local cache. This function only works on Kafka 0.8.2 and higher.
	RefreshCoordinator(consumerGroup string) error

	// Coordinator returns the coordinating broker for a transaction id. It will
	// return a locally cached value if it's available. You can call
	// RefreshCoordinator to update the cached value. This function only works on
	// Kafka 0.11.0.0 and higher.
	TransactionCoordinator(transactionID string) (*Broker, error)

	// RefreshCoordinator retrieves the coordinator for a transaction id and stores it
	// in local cache. This function only works on Kafka 0.11.0.0 and higher.
	RefreshTransactionCoordinator(transactionID string) error

	// InitProducerID retrieves information required for Idempotent Producer
	InitProducerID() (*InitProducerIDResponse, error)

	// LeastLoadedBroker retrieves broker that has the least responses pending
	LeastLoadedBroker() *Broker

	// Close shuts down all broker connections managed by this client. It is required
	// to call this function before a client object passes out of scope, as it will
	// otherwise leak memory. You must close any Producers or Consumers using a client
	// before you close the client.
	Close() error

	// Closed returns true if the client has already had Close called on it
	Closed() bool
}

Client is a generic Kafka client. It manages connections to one or more Kafka brokers. You MUST call Close() on a client to avoid leaks, it will not be garbage-collected automatically when it passes out of scope. It is safe to share a client amongst many users, however Kafka will process requests from a single client strictly in serial, so it is generally more efficient to use the default one client per producer/consumer.

func NewClient 

func NewClient(addrs []string, conf *Config) (Client, error)

NewClient creates a new Client. It connects to one of the given broker addresses and uses that broker to automatically fetch metadata on the rest of the kafka cluster. If metadata cannot be retrieved from any of the given broker addresses, the client is not created.

type ClientQuotasOp 

type ClientQuotasOp struct {
	Key    string  // The quota configuration key.
	Value  float64 // The value to set, otherwise ignored if the value is to be removed.
	Remove bool    // Whether the quota configuration value should be removed, otherwise set.
}

type ClusterAdmin 

type ClusterAdmin interface {
	// Creates a new topic. This operation is supported by brokers with version 0.10.1.0 or higher.
	// It may take several seconds after CreateTopic returns success for all the brokers
	// to become aware that the topic has been created. During this time, listTopics
	// may not return information about the new topic.The validateOnly option is supported from version 0.10.2.0.
	CreateTopic(topic string, detail *TopicDetail, validateOnly bool) error

	// List the topics available in the cluster with the default options.
	ListTopics() (map[string]TopicDetail, error)

	// Describe some topics in the cluster.
	DescribeTopics(topics []string) (metadata []*TopicMetadata, err error)

	// Delete a topic. It may take several seconds after the DeleteTopic to returns success
	// and for all the brokers to become aware that the topics are gone.
	// During this time, listTopics  may continue to return information about the deleted topic.
	// If delete.topic.enable is false on the brokers, deleteTopic will mark
	// the topic for deletion, but not actually delete them.
	// This operation is supported by brokers with version 0.10.1.0 or higher.
	DeleteTopic(topic string) error

	// Increase the number of partitions of the topics  according to the corresponding values.
	// If partitions are increased for a topic that has a key, the partition logic or ordering of
	// the messages will be affected. It may take several seconds after this method returns
	// success for all the brokers to become aware that the partitions have been created.
	// During this time, ClusterAdmin#describeTopics may not return information about the
	// new partitions. This operation is supported by brokers with version 1.0.0 or higher.
	CreatePartitions(topic string, count int32, assignment [][]int32, validateOnly bool) error

	// Alter the replica assignment for partitions.
	// This operation is supported by brokers with version 2.4.0.0 or higher.
	AlterPartitionReassignments(topic string, assignment [][]int32) error

	// Provides info on ongoing partitions replica reassignments.
	// This operation is supported by brokers with version 2.4.0.0 or higher.
	ListPartitionReassignments(topics string, partitions []int32) (topicStatus map[string]map[int32]*PartitionReplicaReassignmentsStatus, err error)

	// Delete records whose offset is smaller than the given offset of the corresponding partition.
	// This operation is supported by brokers with version 0.11.0.0 or higher.
	DeleteRecords(topic string, partitionOffsets map[int32]int64) error

	// Get the configuration for the specified resources.
	// The returned configuration includes default values and the Default is true
	// can be used to distinguish them from user supplied values.
	// Config entries where ReadOnly is true cannot be updated.
	// The value of config entries where Sensitive is true is always nil so
	// sensitive information is not disclosed.
	// This operation is supported by brokers with version 0.11.0.0 or higher.
	DescribeConfig(resource ConfigResource) ([]ConfigEntry, error)

	// Update the configuration for the specified resources with the default options.
	// This operation is supported by brokers with version 0.11.0.0 or higher.
	// The resources with their configs (topic is the only resource type with configs
	// that can be updated currently Updates are not transactional so they may succeed
	// for some resources while fail for others. The configs for a particular resource are updated automatically.
	AlterConfig(resourceType ConfigResourceType, name string, entries map[string]*string, validateOnly bool) error

	// IncrementalAlterConfig Incrementally Update the configuration for the specified resources with the default options.
	// This operation is supported by brokers with version 2.3.0.0 or higher.
	// Updates are not transactional so they may succeed for some resources while fail for others.
	// The configs for a particular resource are updated automatically.
	IncrementalAlterConfig(resourceType ConfigResourceType, name string, entries map[string]IncrementalAlterConfigsEntry, validateOnly bool) error

	// Creates an access control list (ACL) which is bound to a specific resource.
	// This operation is not transactional so it may succeed or fail.
	// If you attempt to add an ACL that duplicates an existing ACL, no error will be raised, but
	// no changes will be made. This operation is supported by brokers with version 0.11.0.0 or higher.
	// Deprecated: Use CreateACLs instead.
	CreateACL(resource Resource, acl Acl) error

	// Creates access control lists (ACLs) which are bound to specific resources.
	// This operation is not transactional so it may succeed for some ACLs while fail for others.
	// If you attempt to add an ACL that duplicates an existing ACL, no error will be raised, but
	// no changes will be made. This operation is supported by brokers with version 0.11.0.0 or higher.
	CreateACLs([]*ResourceAcls) error

	// Lists access control lists (ACLs) according to the supplied filter.
	// it may take some time for changes made by createAcls or deleteAcls to be reflected in the output of ListAcls
	// This operation is supported by brokers with version 0.11.0.0 or higher.
	ListAcls(filter AclFilter) ([]ResourceAcls, error)

	// Deletes access control lists (ACLs) according to the supplied filters.
	// This operation is not transactional so it may succeed for some ACLs while fail for others.
	// This operation is supported by brokers with version 0.11.0.0 or higher.
	DeleteACL(filter AclFilter, validateOnly bool) ([]MatchingAcl, error)

	// List the consumer groups available in the cluster.
	ListConsumerGroups() (map[string]string, error)

	// Describe the given consumer groups.
	DescribeConsumerGroups(groups []string) ([]*GroupDescription, error)

	// List the consumer group offsets available in the cluster.
	ListConsumerGroupOffsets(group string, topicPartitions map[string][]int32) (*OffsetFetchResponse, error)

	// Deletes a consumer group offset
	DeleteConsumerGroupOffset(group string, topic string, partition int32) error

	// Delete a consumer group.
	DeleteConsumerGroup(group string) error

	// Get information about the nodes in the cluster
	DescribeCluster() (brokers []*Broker, controllerID int32, err error)

	// Get information about all log directories on the given set of brokers
	DescribeLogDirs(brokers []int32) (map[int32][]DescribeLogDirsResponseDirMetadata, error)

	// Get information about SCRAM users
	DescribeUserScramCredentials(users []string) ([]*DescribeUserScramCredentialsResult, error)

	// Delete SCRAM users
	DeleteUserScramCredentials(delete []AlterUserScramCredentialsDelete) ([]*AlterUserScramCredentialsResult, error)

	// Upsert SCRAM users
	UpsertUserScramCredentials(upsert []AlterUserScramCredentialsUpsert) ([]*AlterUserScramCredentialsResult, error)

	// Get client quota configurations corresponding to the specified filter.
	// This operation is supported by brokers with version 2.6.0.0 or higher.
	DescribeClientQuotas(components []QuotaFilterComponent, strict bool) ([]DescribeClientQuotasEntry, error)

	// Alters client quota configurations with the specified alterations.
	// This operation is supported by brokers with version 2.6.0.0 or higher.
	AlterClientQuotas(entity []QuotaEntityComponent, op ClientQuotasOp, validateOnly bool) error

	// Controller returns the cluster controller broker. It will return a
	// locally cached value if it's available.
	Controller() (*Broker, error)

	// Remove members from the consumer group by given member identities.
	// This operation is supported by brokers with version 2.3 or higher
	// This is for static membership feature. KIP-345
	RemoveMemberFromConsumerGroup(groupId string, groupInstanceIds []string) (*LeaveGroupResponse, error)

	// Close shuts down the admin and closes underlying client.
	Close() error
}

ClusterAdmin is the administrative client for Kafka, which supports managing and inspecting topics, brokers, configurations and ACLs. The minimum broker version required is 0.10.0.0. Methods with stricter requirements will specify the minimum broker version required. You MUST call Close() on a client to avoid leaks

func NewClusterAdmin 

func NewClusterAdmin(addrs []string, conf *Config) (ClusterAdmin, error)

NewClusterAdmin creates a new ClusterAdmin using the given broker addresses and configuration.

func NewClusterAdminFromClient 

func NewClusterAdminFromClient(client Client) (ClusterAdmin, error)

NewClusterAdminFromClient creates a new ClusterAdmin using the given client. Note that underlying client will also be closed on admin's Close() call.

type CompressionCodec 

type CompressionCodec int8

CompressionCodec represents the various compression codecs recognized by Kafka in messages. 

const (
	// CompressionNone no compression
	CompressionNone CompressionCodec = iota
	// CompressionGZIP compression using GZIP
	CompressionGZIP
	// CompressionSnappy compression using snappy
	CompressionSnappy
	// CompressionLZ4 compression using LZ4
	CompressionLZ4
	// CompressionZSTD compression using ZSTD
	CompressionZSTD

	// CompressionLevelDefault is the constant to use in CompressionLevel
	// to have the default compression level for any codec. The value is picked
	// that we don't use any existing compression levels.
	CompressionLevelDefault = -1000
)

func (CompressionCodec) MarshalText 

func (cc CompressionCodec) MarshalText() ([]byte, error)

MarshalText transforms a CompressionCodec into its string representation.

func (CompressionCodec) String 

func (cc CompressionCodec) String() string

func (*CompressionCodec) UnmarshalText 

func (cc *CompressionCodec) UnmarshalText(text []byte) error

UnmarshalText returns a CompressionCodec from its string representation.

type Config 

type Config struct {
	// Admin is the namespace for ClusterAdmin properties used by the administrative Kafka client.
	Admin struct {
		Retry struct {
			// The total number of times to retry sending (retriable) admin requests (default 5).
			// Similar to the `retries` setting of the JVM AdminClientConfig.
			Max int
			// Backoff time between retries of a failed request (default 100ms)
			Backoff time.Duration
		}
		// The maximum duration the administrative Kafka client will wait for ClusterAdmin operations,
		// including topics, brokers, configurations and ACLs (defaults to 3 seconds).
		Timeout time.Duration
	}

	// Net is the namespace for network-level properties used by the Broker, and
	// shared by the Client/Producer/Consumer.
	Net struct {
		// How many outstanding requests a connection is allowed to have before
		// sending on it blocks (default 5).
		// Throughput can improve but message ordering is not guaranteed if Producer.Idempotent is disabled, see:
		// https://kafka.apache.org/protocol#protocol_network
		// https://kafka.apache.org/28/documentation.html#producerconfigs_max.in.flight.requests.per.connection
		MaxOpenRequests int

		// All three of the below configurations are similar to the
		// `socket.timeout.ms` setting in JVM kafka. All of them default
		// to 30 seconds.
		DialTimeout  time.Duration // How long to wait for the initial connection.
		ReadTimeout  time.Duration // How long to wait for a response.
		WriteTimeout time.Duration // How long to wait for a transmit.

		// ResolveCanonicalBootstrapServers turns each bootstrap broker address
		// into a set of IPs, then does a reverse lookup on each one to get its
		// canonical hostname. This list of hostnames then replaces the
		// original address list. Similar to the `client.dns.lookup` option in
		// the JVM client, this is especially useful with GSSAPI, where it
		// allows providing an alias record instead of individual broker
		// hostnames. Defaults to false.
		ResolveCanonicalBootstrapServers bool

		TLS struct {
			// Whether or not to use TLS when connecting to the broker
			// (defaults to false).
			Enable bool
			// The TLS configuration to use for secure connections if
			// enabled (defaults to nil).
			Config *tls.Config
		}

		// SASL based authentication with broker. While there are multiple SASL authentication methods
		// the current implementation is limited to plaintext (SASL/PLAIN) authentication
		SASL struct {
			// Whether or not to use SASL authentication when connecting to the broker
			// (defaults to false).
			Enable bool
			// SASLMechanism is the name of the enabled SASL mechanism.
			// Possible values: OAUTHBEARER, PLAIN (defaults to PLAIN).
			Mechanism SASLMechanism
			// Version is the SASL Protocol Version to use
			// Kafka > 1.x should use V1, except on Azure EventHub which use V0
			Version int16
			// Whether or not to send the Kafka SASL handshake first if enabled
			// (defaults to true). You should only set this to false if you're using
			// a non-Kafka SASL proxy.
			Handshake bool
			// AuthIdentity is an (optional) authorization identity (authzid) to
			// use for SASL/PLAIN authentication (if different from User) when
			// an authenticated user is permitted to act as the presented
			// alternative user. See RFC4616 for details.
			AuthIdentity string
			// User is the authentication identity (authcid) to present for
			// SASL/PLAIN or SASL/SCRAM authentication
			User string
			// Password for SASL/PLAIN authentication
			Password string
			// authz id used for SASL/SCRAM authentication
			SCRAMAuthzID string
			// SCRAMClientGeneratorFunc is a generator of a user provided implementation of a SCRAM
			// client used to perform the SCRAM exchange with the server.
			SCRAMClientGeneratorFunc func() SCRAMClient
			// TokenProvider is a user-defined callback for generating
			// access tokens for SASL/OAUTHBEARER auth. See the
			// AccessTokenProvider interface docs for proper implementation
			// guidelines.
			TokenProvider AccessTokenProvider

			GSSAPI GSSAPIConfig
		}

		// KeepAlive specifies the keep-alive period for an active network connection (defaults to 0).
		// If zero or positive, keep-alives are enabled.
		// If negative, keep-alives are disabled.
		KeepAlive time.Duration

		// LocalAddr is the local address to use when dialing an
		// address. The address must be of a compatible type for the
		// network being dialed.
		// If nil, a local address is automatically chosen.
		LocalAddr net.Addr

		Proxy struct {
			// Whether or not to use proxy when connecting to the broker
			// (defaults to false).
			Enable bool
			// The proxy dialer to use enabled (defaults to nil).
			Dialer proxy.Dialer
		}
	}

	// Metadata is the namespace for metadata management properties used by the
	// Client, and shared by the Producer/Consumer.
	Metadata struct {
		Retry struct {
			// The total number of times to retry a metadata request when the
			// cluster is in the middle of a leader election (default 3).
			Max int
			// How long to wait for leader election to occur before retrying
			// (default 250ms). Similar to the JVM's `retry.backoff.ms`.
			Backoff time.Duration
			// Called to compute backoff time dynamically. Useful for implementing
			// more sophisticated backoff strategies. This takes precedence over
			// `Backoff` if set.
			BackoffFunc func(retries, maxRetries int) time.Duration
		}
		// How frequently to refresh the cluster metadata in the background.
		// Defaults to 10 minutes. Set to 0 to disable. Similar to
		// `topic.metadata.refresh.interval.ms` in the JVM version.
		RefreshFrequency time.Duration

		// Whether to maintain a full set of metadata for all topics, or just
		// the minimal set that has been necessary so far. The full set is simpler
		// and usually more convenient, but can take up a substantial amount of
		// memory if you have many topics and partitions. Defaults to true.
		Full bool

		// How long to wait for a successful metadata response.
		// Disabled by default which means a metadata request against an unreachable
		// cluster (all brokers are unreachable or unresponsive) can take up to
		// `Net.[Dial|Read]Timeout * BrokerCount * (Metadata.Retry.Max + 1) + Metadata.Retry.Backoff * Metadata.Retry.Max`
		// to fail.
		Timeout time.Duration

		// Whether to allow auto-create topics in metadata refresh. If set to true,
		// the broker may auto-create topics that we requested which do not already exist,
		// if it is configured to do so (`auto.create.topics.enable` is true). Defaults to true.
		AllowAutoTopicCreation bool
	}

	// Producer is the namespace for configuration related to producing messages,
	// used by the Producer.
	Producer struct {
		// The maximum permitted size of a message (defaults to 1000000). Should be
		// set equal to or smaller than the broker's `message.max.bytes`.
		MaxMessageBytes int
		// The level of acknowledgement reliability needed from the broker (defaults
		// to WaitForLocal). Equivalent to the `request.required.acks` setting of the
		// JVM producer.
		RequiredAcks RequiredAcks
		// The maximum duration the broker will wait the receipt of the number of
		// RequiredAcks (defaults to 10 seconds). This is only relevant when
		// RequiredAcks is set to WaitForAll or a number > 1. Only supports
		// millisecond resolution, nanoseconds will be truncated. Equivalent to
		// the JVM producer's `request.timeout.ms` setting.
		Timeout time.Duration
		// The type of compression to use on messages (defaults to no compression).
		// Similar to `compression.codec` setting of the JVM producer.
		Compression CompressionCodec
		// The level of compression to use on messages. The meaning depends
		// on the actual compression type used and defaults to default compression
		// level for the codec.
		CompressionLevel int
		// Generates partitioners for choosing the partition to send messages to
		// (defaults to hashing the message key). Similar to the `partitioner.class`
		// setting for the JVM producer.
		Partitioner PartitionerConstructor
		// If enabled, the producer will ensure that exactly one copy of each message is
		// written.
		Idempotent bool
		// Transaction specify
		Transaction struct {
			// Used in transactions to identify an instance of a producer through restarts
			ID string
			// Amount of time a transaction can remain unresolved (neither committed nor aborted)
			// default is 1 min
			Timeout time.Duration

			Retry struct {
				// The total number of times to retry sending a message (default 50).
				// Similar to the `message.send.max.retries` setting of the JVM producer.
				Max int
				// How long to wait for the cluster to settle between retries
				// (default 10ms). Similar to the `retry.backoff.ms` setting of the
				// JVM producer.
				Backoff time.Duration
				// Called to compute backoff time dynamically. Useful for implementing
				// more sophisticated backoff strategies. This takes precedence over
				// `Backoff` if set.
				BackoffFunc func(retries, maxRetries int) time.Duration
			}
		}

		// Return specifies what channels will be populated. If they are set to true,
		// you must read from the respective channels to prevent deadlock. If,
		// however, this config is used to create a `SyncProducer`, both must be set
		// to true and you shall not read from the channels since the producer does
		// this internally.
		Return struct {
			// If enabled, successfully delivered messages will be returned on the
			// Successes channel (default disabled).
			Successes bool

			// If enabled, messages that failed to deliver will be returned on the
			// Errors channel, including error (default enabled).
			Errors bool
		}

		// The following config options control how often messages are batched up and
		// sent to the broker. By default, messages are sent as fast as possible, and
		// all messages received while the current batch is in-flight are placed
		// into the subsequent batch.
		Flush struct {
			// The best-effort number of bytes needed to trigger a flush. Use the
			// global sarama.MaxRequestSize to set a hard upper limit.
			Bytes int
			// The best-effort number of messages needed to trigger a flush. Use
			// `MaxMessages` to set a hard upper limit.
			Messages int
			// The best-effort frequency of flushes. Equivalent to
			// `queue.buffering.max.ms` setting of JVM producer.
			Frequency time.Duration
			// The maximum number of messages the producer will send in a single
			// broker request. Defaults to 0 for unlimited. Similar to
			// `queue.buffering.max.messages` in the JVM producer.
			MaxMessages int
		}

		Retry struct {
			// The total number of times to retry sending a message (default 3).
			// Similar to the `message.send.max.retries` setting of the JVM producer.
			Max int
			// How long to wait for the cluster to settle between retries
			// (default 100ms). Similar to the `retry.backoff.ms` setting of the
			// JVM producer.
			Backoff time.Duration
			// Called to compute backoff time dynamically. Useful for implementing
			// more sophisticated backoff strategies. This takes precedence over
			// `Backoff` if set.
			BackoffFunc func(retries, maxRetries int) time.Duration
		}

		// Interceptors to be called when the producer dispatcher reads the
		// message for the first time. Interceptors allows to intercept and
		// possible mutate the message before they are published to Kafka
		// cluster. *ProducerMessage modified by the first interceptor's
		// OnSend() is passed to the second interceptor OnSend(), and so on in
		// the interceptor chain.
		Interceptors []ProducerInterceptor
	}

	// Consumer is the namespace for configuration related to consuming messages,
	// used by the Consumer.
	Consumer struct {
		// Group is the namespace for configuring consumer group.
		Group struct {
			Session struct {
				// The timeout used to detect consumer failures when using Kafka's group management facility.
				// The consumer sends periodic heartbeats to indicate its liveness to the broker.
				// If no heartbeats are received by the broker before the expiration of this session timeout,
				// then the broker will remove this consumer from the group and initiate a rebalance.
				// Note that the value must be in the allowable range as configured in the broker configuration
				// by `group.min.session.timeout.ms` and `group.max.session.timeout.ms` (default 10s)
				Timeout time.Duration
			}
			Heartbeat struct {
				// The expected time between heartbeats to the consumer coordinator when using Kafka's group
				// management facilities. Heartbeats are used to ensure that the consumer's session stays active and
				// to facilitate rebalancing when new consumers join or leave the group.
				// The value must be set lower than Consumer.Group.Session.Timeout, but typically should be set no
				// higher than 1/3 of that value.
				// It can be adjusted even lower to control the expected time for normal rebalances (default 3s)
				Interval time.Duration
			}
			Rebalance struct {
				// Strategy for allocating topic partitions to members.
				// Deprecated: Strategy exists for historical compatibility
				// and should not be used. Please use GroupStrategies.
				Strategy BalanceStrategy

				// GroupStrategies is the priority-ordered list of client-side consumer group
				// balancing strategies that will be offered to the coordinator. The first
				// strategy that all group members support will be chosen by the leader.
				// default: [ NewBalanceStrategyRange() ]
				GroupStrategies []BalanceStrategy

				// The maximum allowed time for each worker to join the group once a rebalance has begun.
				// This is basically a limit on the amount of time needed for all tasks to flush any pending
				// data and commit offsets. If the timeout is exceeded, then the worker will be removed from
				// the group, which will cause offset commit failures (default 60s).
				Timeout time.Duration

				Retry struct {
					// When a new consumer joins a consumer group the set of consumers attempt to "rebalance"
					// the load to assign partitions to each consumer. If the set of consumers changes while
					// this assignment is taking place the rebalance will fail and retry. This setting controls
					// the maximum number of attempts before giving up (default 4).
					Max int
					// Backoff time between retries during rebalance (default 2s)
					Backoff time.Duration
				}
			}
			Member struct {
				// Custom metadata to include when joining the group. The user data for all joined members
				// can be retrieved by sending a DescribeGroupRequest to the broker that is the
				// coordinator for the group.
				UserData []byte
			}

			// support KIP-345
			InstanceId string

			// If true, consumer offsets will be automatically reset to configured Initial value
			// if the fetched consumer offset is out of range of available offsets. Out of range
			// can happen if the data has been deleted from the server, or during situations of
			// under-replication where a replica does not have all the data yet. It can be
			// dangerous to reset the offset automatically, particularly in the latter case. Defaults
			// to true to maintain existing behavior.
			ResetInvalidOffsets bool
		}

		Retry struct {
			// How long to wait after a failing to read from a partition before
			// trying again (default 2s).
			Backoff time.Duration
			// Called to compute backoff time dynamically. Useful for implementing
			// more sophisticated backoff strategies. This takes precedence over
			// `Backoff` if set.
			BackoffFunc func(retries int) time.Duration
		}

		// Fetch is the namespace for controlling how many bytes are retrieved by any
		// given request.
		Fetch struct {
			// The minimum number of message bytes to fetch in a request - the broker
			// will wait until at least this many are available. The default is 1,
			// as 0 causes the consumer to spin when no messages are available.
			// Equivalent to the JVM's `fetch.min.bytes`.
			Min int32
			// The default number of message bytes to fetch from the broker in each
			// request (default 1MB). This should be larger than the majority of
			// your messages, or else the consumer will spend a lot of time
			// negotiating sizes and not actually consuming. Similar to the JVM's
			// `fetch.message.max.bytes`.
			Default int32
			// The maximum number of message bytes to fetch from the broker in a
			// single request. Messages larger than this will return
			// ErrMessageTooLarge and will not be consumable, so you must be sure
			// this is at least as large as your largest message. Defaults to 0
			// (no limit). Similar to the JVM's `fetch.message.max.bytes`. The
			// global `sarama.MaxResponseSize` still applies.
			Max int32
		}
		// The maximum amount of time the broker will wait for Consumer.Fetch.Min
		// bytes to become available before it returns fewer than that anyways. The
		// default is 250ms, since 0 causes the consumer to spin when no events are
		// available. 100-500ms is a reasonable range for most cases. Kafka only
		// supports precision up to milliseconds; nanoseconds will be truncated.
		// Equivalent to the JVM's `fetch.wait.max.ms`.
		MaxWaitTime time.Duration

		// The maximum amount of time the consumer expects a message takes to
		// process for the user. If writing to the Messages channel takes longer
		// than this, that partition will stop fetching more messages until it
		// can proceed again.
		// Note that, since the Messages channel is buffered, the actual grace time is
		// (MaxProcessingTime * ChannelBufferSize). Defaults to 100ms.
		// If a message is not written to the Messages channel between two ticks
		// of the expiryTicker then a timeout is detected.
		// Using a ticker instead of a timer to detect timeouts should typically
		// result in many fewer calls to Timer functions which may result in a
		// significant performance improvement if many messages are being sent
		// and timeouts are infrequent.
		// The disadvantage of using a ticker instead of a timer is that
		// timeouts will be less accurate. That is, the effective timeout could
		// be between `MaxProcessingTime` and `2 * MaxProcessingTime`. For
		// example, if `MaxProcessingTime` is 100ms then a delay of 180ms
		// between two messages being sent may not be recognized as a timeout.
		MaxProcessingTime time.Duration

		// Return specifies what channels will be populated. If they are set to true,
		// you must read from them to prevent deadlock.
		Return struct {
			// If enabled, any errors that occurred while consuming are returned on
			// the Errors channel (default disabled).
			Errors bool
		}

		// Offsets specifies configuration for how and when to commit consumed
		// offsets. This currently requires the manual use of an OffsetManager
		// but will eventually be automated.
		Offsets struct {
			// Deprecated: CommitInterval exists for historical compatibility
			// and should not be used. Please use Consumer.Offsets.AutoCommit
			CommitInterval time.Duration

			// AutoCommit specifies configuration for commit messages automatically.
			AutoCommit struct {
				// Whether or not to auto-commit updated offsets back to the broker.
				// (default enabled).
				Enable bool

				// How frequently to commit updated offsets. Ineffective unless
				// auto-commit is enabled (default 1s)
				Interval time.Duration
			}

			// The initial offset to use if no offset was previously committed.
			// Should be OffsetNewest or OffsetOldest. Defaults to OffsetNewest.
			Initial int64

			// The retention duration for committed offsets. If zero, disabled
			// (in which case the `offsets.retention.minutes` option on the
			// broker will be used).  Kafka only supports precision up to
			// milliseconds; nanoseconds will be truncated. Requires Kafka
			// broker version 0.9.0 or later.
			// (default is 0: disabled).
			Retention time.Duration

			Retry struct {
				// The total number of times to retry failing commit
				// requests during OffsetManager shutdown (default 3).
				Max int
			}
		}

		// IsolationLevel support 2 mode:
		// 	- use `ReadUncommitted` (default) to consume and return all messages in message channel
		//	- use `ReadCommitted` to hide messages that are part of an aborted transaction
		IsolationLevel IsolationLevel

		// Interceptors to be called just before the record is sent to the
		// messages channel. Interceptors allows to intercept and possible
		// mutate the message before they are returned to the client.
		// *ConsumerMessage modified by the first interceptor's OnConsume() is
		// passed to the second interceptor OnConsume(), and so on in the
		// interceptor chain.
		Interceptors []ConsumerInterceptor
	}

	// A user-provided string sent with every request to the brokers for logging,
	// debugging, and auditing purposes. Defaults to "sarama", but you should
	// probably set it to something specific to your application.
	ClientID string
	// A rack identifier for this client. This can be any string value which
	// indicates where this client is physically located.
	// It corresponds with the broker config 'broker.rack'
	RackID string
	// The number of events to buffer in internal and external channels. This
	// permits the producer and consumer to continue processing some messages
	// in the background while user code is working, greatly improving throughput.
	// Defaults to 256.
	ChannelBufferSize int
	// ApiVersionsRequest determines whether Sarama should send an
	// ApiVersionsRequest message to each broker as part of its initial
	// connection. This defaults to `true` to match the official Java client
	// and most 3rdparty ones.
	ApiVersionsRequest bool
	// The version of Kafka that Sarama will assume it is running against.
	// Defaults to the oldest supported stable version. Since Kafka provides
	// backwards-compatibility, setting it to a version older than you have
	// will not break anything, although it may prevent you from using the
	// latest features. Setting it to a version greater than you are actually
	// running may lead to random breakage.
	Version KafkaVersion
	// The registry to define metrics into.
	// Defaults to a local registry.
	// If you want to disable metrics gathering, set "metrics.UseNilMetrics" to "true"
	// prior to starting Sarama.
	// See Examples on how to use the metrics registry
	MetricRegistry metrics.Registry
}

Config is used to pass multiple configuration options to Sarama's constructors.

Example (Metrics)

This example shows how to integrate with an existing registry as well as publishing metrics on the standard output 

// Our application registry
appMetricRegistry := metrics.NewRegistry()
appGauge := metrics.GetOrRegisterGauge("m1", appMetricRegistry)
appGauge.Update(1)

config := NewTestConfig()
// Use a prefix registry instead of the default local one
config.MetricRegistry = metrics.NewPrefixedChildRegistry(appMetricRegistry, "sarama.")

// Simulate a metric created by sarama without starting a broker
saramaGauge := metrics.GetOrRegisterGauge("m2", config.MetricRegistry)
saramaGauge.Update(2)

metrics.WriteOnce(appMetricRegistry, os.Stdout)

Output:

gauge m1
  value:               1
gauge sarama.m2
  value:               2

func NewConfig 

func NewConfig() *Config

NewConfig returns a new configuration instance with sane defaults.

func (*Config) Validate 

func (c *Config) Validate() error

Validate checks a Config instance. It will return a ConfigurationError if the specified values don't make sense.

type ConfigEntry 

type ConfigEntry struct {
	Name      string
	Value     string
	ReadOnly  bool
	Default   bool
	Source    ConfigSource
	Sensitive bool
	Synonyms  []*ConfigSynonym
}

type ConfigResource 

type ConfigResource struct {
	Type        ConfigResourceType
	Name        string
	ConfigNames []string
}

type ConfigResourceType 

type ConfigResourceType int8

ConfigResourceType is a type for resources that have configs. 

const (
	// UnknownResource constant type
	UnknownResource ConfigResourceType = 0
	// TopicResource constant type
	TopicResource ConfigResourceType = 2
	// BrokerResource constant type
	BrokerResource ConfigResourceType = 4
	// BrokerLoggerResource constant type
	BrokerLoggerResource ConfigResourceType = 8
)

type ConfigSource 

type ConfigSource int8
const (
	SourceUnknown ConfigSource = iota
	SourceTopic
	SourceDynamicBroker
	SourceDynamicDefaultBroker
	SourceStaticBroker
	SourceDefault
)

func (ConfigSource) String 

func (s ConfigSource) String() string

type ConfigSynonym 

type ConfigSynonym struct {
	ConfigName  string
	ConfigValue string
	Source      ConfigSource
}

type ConfigurationError 

type ConfigurationError string

ConfigurationError is the type of error returned from a constructor (e.g. NewClient, or NewConsumer) when the specified configuration is invalid.

func (ConfigurationError) Error 

func (err ConfigurationError) Error() string

type Consumer 

type Consumer interface {
	// Topics returns the set of available topics as retrieved from the cluster
	// metadata. This method is the same as Client.Topics(), and is provided for
	// convenience.
	Topics() ([]string, error)

	// Partitions returns the sorted list of all partition IDs for the given topic.
	// This method is the same as Client.Partitions(), and is provided for convenience.
	Partitions(topic string) ([]int32, error)

	// ConsumePartition creates a PartitionConsumer on the given topic/partition with
	// the given offset. It will return an error if this Consumer is already consuming
	// on the given topic/partition. Offset can be a literal offset, or OffsetNewest
	// or OffsetOldest
	ConsumePartition(topic string, partition int32, offset int64) (PartitionConsumer, error)

	// HighWaterMarks returns the current high water marks for each topic and partition.
	// Consistency between partitions is not guaranteed since high water marks are updated separately.
	HighWaterMarks() map[string]map[int32]int64

	// Close shuts down the consumer. It must be called after all child
	// PartitionConsumers have already been closed.
	Close() error

	// Pause suspends fetching from the requested partitions. Future calls to the broker will not return any
	// records from these partitions until they have been resumed using Resume()/ResumeAll().
	// Note that this method does not affect partition subscription.
	// In particular, it does not cause a group rebalance when automatic assignment is used.
	Pause(topicPartitions map[string][]int32)

	// Resume resumes specified partitions which have been paused with Pause()/PauseAll().
	// New calls to the broker will return records from these partitions if there are any to be fetched.
	Resume(topicPartitions map[string][]int32)

	// PauseAll suspends fetching from all partitions. Future calls to the broker will not return any
	// records from these partitions until they have been resumed using Resume()/ResumeAll().
	// Note that this method does not affect partition subscription.
	// In particular, it does not cause a group rebalance when automatic assignment is used.
	PauseAll()

	// ResumeAll resumes all partitions which have been paused with Pause()/PauseAll().
	// New calls to the broker will return records from these partitions if there are any to be fetched.
	ResumeAll()
}

Consumer manages PartitionConsumers which process Kafka messages from brokers. You MUST call Close() on a consumer to avoid leaks, it will not be garbage-collected automatically when it passes out of scope.

Example

This example shows how to use the consumer to read messages from a single partition. 

consumer, err := NewConsumer([]string{"localhost:9092"}, NewTestConfig())
if err != nil {
	panic(err)
}

defer func() {
	if err := consumer.Close(); err != nil {
		log.Fatalln(err)
	}
}()

partitionConsumer, err := consumer.ConsumePartition("my_topic", 0, OffsetNewest)
if err != nil {
	panic(err)
}

defer func() {
	if err := partitionConsumer.Close(); err != nil {
		log.Fatalln(err)
	}
}()

// Trap SIGINT to trigger a shutdown.
signals := make(chan os.Signal, 1)
signal.Notify(signals, os.Interrupt)

consumed := 0
ConsumerLoop:
for {
	select {
	case msg := <-partitionConsumer.Messages():
		log.Printf("Consumed message offset %d\n", msg.Offset)
		consumed++
	case <-signals:
		break ConsumerLoop
	}
}

log.Printf("Consumed: %d\n", consumed)

Output:

func NewConsumer 

func NewConsumer(addrs []string, config *Config) (Consumer, error)

NewConsumer creates a new consumer using the given broker addresses and configuration.

func NewConsumerFromClient 

func NewConsumerFromClient(client Client) (Consumer, error)

NewConsumerFromClient creates a new consumer using the given client. It is still necessary to call Close() on the underlying client when shutting down this consumer.

type ConsumerError 

type ConsumerError struct {
	Topic     string
	Partition int32
	Err       error
}

ConsumerError is what is provided to the user when an error occurs. It wraps an error and includes the topic and partition.

func (ConsumerError) Error 

func (ce ConsumerError) Error() string

func (ConsumerError) Unwrap 

func (ce ConsumerError) Unwrap() error

type ConsumerErrors 

type ConsumerErrors []*ConsumerError

ConsumerErrors is a type that wraps a batch of errors and implements the Error interface. It can be returned from the PartitionConsumer's Close methods to avoid the need to manually drain errors when stopping.

func (ConsumerErrors) Error 

func (ce ConsumerErrors) Error() string

type ConsumerGroup 

type ConsumerGroup interface {
	// Consume joins a cluster of consumers for a given list of topics and
	// starts a blocking ConsumerGroupSession through the ConsumerGroupHandler.
	//
	// The life-cycle of a session is represented by the following steps:
	//
	// 1. The consumers join the group (as explained in https://kafka.apache.org/documentation/#intro_consumers)
	//    and is assigned their "fair share" of partitions, aka 'claims'.
	// 2. Before processing starts, the handler's Setup() hook is called to notify the user
	//    of the claims and allow any necessary preparation or alteration of state.
	// 3. For each of the assigned claims the handler's ConsumeClaim() function is then called
	//    in a separate goroutine which requires it to be thread-safe. Any state must be carefully protected
	//    from concurrent reads/writes.
	// 4. The session will persist until one of the ConsumeClaim() functions exits. This can be either when the
	//    parent context is canceled or when a server-side rebalance cycle is initiated.
	// 5. Once all the ConsumeClaim() loops have exited, the handler's Cleanup() hook is called
	//    to allow the user to perform any final tasks before a rebalance.
	// 6. Finally, marked offsets are committed one last time before claims are released.
	//
	// Please note, that once a rebalance is triggered, sessions must be completed within
	// Config.Consumer.Group.Rebalance.Timeout. This means that ConsumeClaim() functions must exit
	// as quickly as possible to allow time for Cleanup() and the final offset commit. If the timeout
	// is exceeded, the consumer will be removed from the group by Kafka, which will cause offset
	// commit failures.
	// This method should be called inside an infinite loop, when a
	// server-side rebalance happens, the consumer session will need to be
	// recreated to get the new claims.
	Consume(ctx context.Context, topics []string, handler ConsumerGroupHandler) error

	// Errors returns a read channel of errors that occurred during the consumer life-cycle.
	// By default, errors are logged and not returned over this channel.
	// If you want to implement any custom error handling, set your config's
	// Consumer.Return.Errors setting to true, and read from this channel.
	Errors() <-chan error

	// Close stops the ConsumerGroup and detaches any running sessions. It is required to call
	// this function before the object passes out of scope, as it will otherwise leak memory.
	Close() error

	// Pause suspends fetching from the requested partitions. Future calls to the broker will not return any
	// records from these partitions until they have been resumed using Resume()/ResumeAll().
	// Note that this method does not affect partition subscription.
	// In particular, it does not cause a group rebalance when automatic assignment is used.
	Pause(partitions map[string][]int32)

	// Resume resumes specified partitions which have been paused with Pause()/PauseAll().
	// New calls to the broker will return records from these partitions if there are any to be fetched.
	Resume(partitions map[string][]int32)

	// Pause suspends fetching from all partitions. Future calls to the broker will not return any
	// records from these partitions until they have been resumed using Resume()/ResumeAll().
	// Note that this method does not affect partition subscription.
	// In particular, it does not cause a group rebalance when automatic assignment is used.
	PauseAll()

	// Resume resumes all partitions which have been paused with Pause()/PauseAll().
	// New calls to the broker will return records from these partitions if there are any to be fetched.
	ResumeAll()
}

ConsumerGroup is responsible for dividing up processing of topics and partitions over a collection of processes (the members of the consumer group).

Example 
package main

import (
	"context"
	"fmt"
)

type exampleConsumerGroupHandler struct{}

func (exampleConsumerGroupHandler) Setup(_ ConsumerGroupSession) error   { return nil }
func (exampleConsumerGroupHandler) Cleanup(_ ConsumerGroupSession) error { return nil }
func (h exampleConsumerGroupHandler) ConsumeClaim(sess ConsumerGroupSession, claim ConsumerGroupClaim) error {
	for msg := range claim.Messages() {
		fmt.Printf("Message topic:%q partition:%d offset:%d\n", msg.Topic, msg.Partition, msg.Offset)
		sess.MarkMessage(msg, "")
	}
	return nil
}

func main() {
	config := NewTestConfig()
	config.Version = V2_0_0_0 // specify appropriate version
	config.Consumer.Return.Errors = true

	group, err := NewConsumerGroup([]string{"localhost:9092"}, "my-group", config)
	if err != nil {
		panic(err)
	}
	defer func() { _ = group.Close() }()

	// Track errors
	go func() {
		for err := range group.Errors() {
			fmt.Println("ERROR", err)
		}
	}()

	// Iterate over consumer sessions.
	ctx := context.Background()
	for {
		topics := []string{"my-topic"}
		handler := exampleConsumerGroupHandler{}

		// `Consume` should be called inside an infinite loop, when a
		// server-side rebalance happens, the consumer session will need to be
		// recreated to get the new claims
		err := group.Consume(ctx, topics, handler)
		if err != nil {
			panic(err)
		}
	}
}

Output:

func NewConsumerGroup 

func NewConsumerGroup(addrs []string, groupID string, config *Config) (ConsumerGroup, error)

NewConsumerGroup creates a new consumer group the given broker addresses and configuration.

func NewConsumerGroupFromClient 

func NewConsumerGroupFromClient(groupID string, client Client) (ConsumerGroup, error)

NewConsumerGroupFromClient creates a new consumer group using the given client. It is still necessary to call Close() on the underlying client when shutting down this consumer. PLEASE NOTE: consumer groups can only re-use but not share clients.

type ConsumerGroupClaim 

type ConsumerGroupClaim interface {
	// Topic returns the consumed topic name.
	Topic() string

	// Partition returns the consumed partition.
	Partition() int32

	// InitialOffset returns the initial offset that was used as a starting point for this claim.
	InitialOffset() int64

	// HighWaterMarkOffset returns the high watermark offset of the partition,
	// i.e. the offset that will be used for the next message that will be produced.
	// You can use this to determine how far behind the processing is.
	HighWaterMarkOffset() int64

	// Messages returns the read channel for the messages that are returned by
	// the broker. The messages channel will be closed when a new rebalance cycle
	// is due. You must finish processing and mark offsets within
	// Config.Consumer.Group.Session.Timeout before the topic/partition is eventually
	// re-assigned to another group member.
	Messages() <-chan *ConsumerMessage
}

ConsumerGroupClaim processes Kafka messages from a given topic and partition within a consumer group.

type ConsumerGroupHandler 

type ConsumerGroupHandler interface {
	// Setup is run at the beginning of a new session, before ConsumeClaim.
	Setup(ConsumerGroupSession) error

	// Cleanup is run at the end of a session, once all ConsumeClaim goroutines have exited
	// but before the offsets are committed for the very last time.
	Cleanup(ConsumerGroupSession) error

	// ConsumeClaim must start a consumer loop of ConsumerGroupClaim's Messages().
	// Once the Messages() channel is closed, the Handler must finish its processing
	// loop and exit.
	ConsumeClaim(ConsumerGroupSession, ConsumerGroupClaim) error
}

ConsumerGroupHandler instances are used to handle individual topic/partition claims. It also provides hooks for your consumer group session life-cycle and allow you to trigger logic before or after the consume loop(s).

PLEASE NOTE that handlers are likely be called from several goroutines concurrently, ensure that all state is safely protected against race conditions.

type ConsumerGroupMemberAssignment 

type ConsumerGroupMemberAssignment struct {
	Version  int16
	Topics   map[string][]int32
	UserData []byte
}

ConsumerGroupMemberAssignment holds the member assignment for a consume group https://github.com/apache/kafka/blob/trunk/clients/src/main/resources/common/message/ConsumerProtocolAssignment.json

type ConsumerGroupMemberMetadata 

type ConsumerGroupMemberMetadata struct {
	Version         int16
	Topics          []string
	UserData        []byte
	OwnedPartitions []*OwnedPartition
	GenerationID    int32
	RackID          *string
}

ConsumerGroupMemberMetadata holds the metadata for consumer group https://github.com/apache/kafka/blob/trunk/clients/src/main/resources/common/message/ConsumerProtocolSubscription.json

type ConsumerGroupSession 

type ConsumerGroupSession interface {
	// Claims returns information about the claimed partitions by topic.
	Claims() map[string][]int32

	// MemberID returns the cluster member ID.
	MemberID() string

	// GenerationID returns the current generation ID.
	GenerationID() int32

	// MarkOffset marks the provided offset, alongside a metadata string
	// that represents the state of the partition consumer at that point in time. The
	// metadata string can be used by another consumer to restore that state, so it
	// can resume consumption.
	//
	// To follow upstream conventions, you are expected to mark the offset of the
	// next message to read, not the last message read. Thus, when calling `MarkOffset`
	// you should typically add one to the offset of the last consumed message.
	//
	// Note: calling MarkOffset does not necessarily commit the offset to the backend
	// store immediately for efficiency reasons, and it may never be committed if
	// your application crashes. This means that you may end up processing the same
	// message twice, and your processing should ideally be idempotent.
	MarkOffset(topic string, partition int32, offset int64, metadata string)

	// Commit the offset to the backend
	//
	// Note: calling Commit performs a blocking synchronous operation.
	Commit()

	// ResetOffset resets to the provided offset, alongside a metadata string that
	// represents the state of the partition consumer at that point in time. Reset
	// acts as a counterpart to MarkOffset, the difference being that it allows to
	// reset an offset to an earlier or smaller value, where MarkOffset only
	// allows incrementing the offset. cf MarkOffset for more details.
	ResetOffset(topic string, partition int32, offset int64, metadata string)

	// MarkMessage marks a message as consumed.
	MarkMessage(msg *ConsumerMessage, metadata string)

	// Context returns the session context.
	Context() context.Context
}

ConsumerGroupSession represents a consumer group member session.

type ConsumerInterceptor 

type ConsumerInterceptor interface {

	// OnConsume is called when the consumed message is intercepted. Please
	// avoid modifying the message until it's safe to do so, as this is _not_ a
	// copy of the message.
	OnConsume(*ConsumerMessage)
}

ConsumerInterceptor allows you to intercept (and possibly mutate) the records received by the consumer before they are sent to the messages channel. https://cwiki.apache.org/confluence/display/KAFKA/KIP-42%3A+Add+Producer+and+Consumer+Interceptors#KIP42:AddProducerandConsumerInterceptors-Motivation

type ConsumerMessage 

type ConsumerMessage struct {
	Headers        []*RecordHeader // only set if kafka is version 0.11+
	Timestamp      time.Time       // only set if kafka is version 0.10+, inner message timestamp
	BlockTimestamp time.Time       // only set if kafka is version 0.10+, outer (compressed) block timestamp

	Key, Value []byte
	Topic      string
	Partition  int32
	Offset     int64
}

ConsumerMessage encapsulates a Kafka message returned by the consumer.

type ConsumerMetadataRequest 

type ConsumerMetadataRequest struct {
	Version       int16
	ConsumerGroup string
}

ConsumerMetadataRequest is used for metadata requests

type ConsumerMetadataResponse 

type ConsumerMetadataResponse struct {
	Version         int16
	Err             KError
	Coordinator     *Broker
	CoordinatorID   int32  // deprecated: use Coordinator.ID()
	CoordinatorHost string // deprecated: use Coordinator.Addr()
	CoordinatorPort int32  // deprecated: use Coordinator.Addr()
}

ConsumerMetadataResponse holds the response for a consumer group meta data requests

type ControlRecord 

type ControlRecord struct {
	Version          int16
	CoordinatorEpoch int32
	Type             ControlRecordType
}

Control records are returned as a record by fetchRequest However unlike "normal" records, they mean nothing application wise. They only serve internal logic for supporting transactions.

type ControlRecordType 

type ControlRecordType int

ControlRecordType ... 

const (
	// ControlRecordAbort is a control record for abort
	ControlRecordAbort ControlRecordType = iota
	// ControlRecordCommit is a control record for commit
	ControlRecordCommit
	// ControlRecordUnknown is a control record of unknown type
	ControlRecordUnknown
)

type CoordinatorType 

type CoordinatorType int8
const (
	CoordinatorGroup CoordinatorType = iota
	CoordinatorTransaction
)

type CreateAclsRequest 

type CreateAclsRequest struct {
	Version      int16
	AclCreations []*AclCreation
}

CreateAclsRequest is an acl creation request

type CreateAclsResponse 

type CreateAclsResponse struct {
	Version              int16
	ThrottleTime         time.Duration
	AclCreationResponses []*AclCreationResponse
}

CreateAclsResponse is a an acl response creation type

type CreatePartitionsRequest 

type CreatePartitionsRequest struct {
	Version         int16
	TopicPartitions map[string]*TopicPartition
	Timeout         time.Duration
	ValidateOnly    bool
}

type CreatePartitionsResponse 

type CreatePartitionsResponse struct {
	Version              int16
	ThrottleTime         time.Duration
	TopicPartitionErrors map[string]*TopicPartitionError
}

type CreateTopicsRequest 

type CreateTopicsRequest struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// TopicDetails contains the topics to create.
	TopicDetails map[string]*TopicDetail
	// Timeout contains how long to wait before timing out the request.
	Timeout time.Duration
	// ValidateOnly if true, check that the topics can be created as specified,
	// but don't create anything.
	ValidateOnly bool
}

type CreateTopicsResponse 

type CreateTopicsResponse struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ThrottleTime contains the duration for which the request was throttled due
	// to a quota violation, or zero if the request did not violate any quota.
	ThrottleTime time.Duration
	// TopicErrors contains a map of any errors for the topics we tried to create.
	TopicErrors map[string]*TopicError
}

type DeleteAclsRequest 

type DeleteAclsRequest struct {
	Version int
	Filters []*AclFilter
}

DeleteAclsRequest is a delete acl request

type DeleteAclsResponse 

type DeleteAclsResponse struct {
	Version         int16
	ThrottleTime    time.Duration
	FilterResponses []*FilterResponse
}

DeleteAclsResponse is a delete acl response

type DeleteGroupsRequest 

type DeleteGroupsRequest struct {
	Version int16
	Groups  []string
}

func (*DeleteGroupsRequest) AddGroup 

func (r *DeleteGroupsRequest) AddGroup(group string)

type DeleteGroupsResponse 

type DeleteGroupsResponse struct {
	Version         int16
	ThrottleTime    time.Duration
	GroupErrorCodes map[string]KError
}

type DeleteOffsetsRequest 

type DeleteOffsetsRequest struct {
	Version int16
	Group   string
	// contains filtered or unexported fields
}

func (*DeleteOffsetsRequest) AddPartition 

func (r *DeleteOffsetsRequest) AddPartition(topic string, partitionID int32)

type DeleteOffsetsResponse 

type DeleteOffsetsResponse struct {
	Version int16
	// The top-level error code, or 0 if there was no error.
	ErrorCode    KError
	ThrottleTime time.Duration
	// The responses for each partition of the topics.
	Errors map[string]map[int32]KError
}

func (*DeleteOffsetsResponse) AddError 

func (r *DeleteOffsetsResponse) AddError(topic string, partition int32, errorCode KError)

type DeleteRecordsRequest 

type DeleteRecordsRequest struct {
	Version int16
	Topics  map[string]*DeleteRecordsRequestTopic
	Timeout time.Duration
}

type DeleteRecordsRequestTopic 

type DeleteRecordsRequestTopic struct {
	PartitionOffsets map[int32]int64 // partition => offset
}

type DeleteRecordsResponse 

type DeleteRecordsResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Topics       map[string]*DeleteRecordsResponseTopic
}

type DeleteRecordsResponsePartition 

type DeleteRecordsResponsePartition struct {
	LowWatermark int64
	Err          KError
}

type DeleteRecordsResponseTopic 

type DeleteRecordsResponseTopic struct {
	Partitions map[int32]*DeleteRecordsResponsePartition
}

type DeleteTopicsRequest 

type DeleteTopicsRequest struct {
	Version int16
	Topics  []string
	Timeout time.Duration
}

type DeleteTopicsResponse 

type DeleteTopicsResponse struct {
	Version         int16
	ThrottleTime    time.Duration
	TopicErrorCodes map[string]KError
}

type DescribeAclsRequest 

type DescribeAclsRequest struct {
	Version int
	AclFilter
}

DescribeAclsRequest is a describe acl request type

type DescribeAclsResponse 

type DescribeAclsResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Err          KError
	ErrMsg       *string
	ResourceAcls []*ResourceAcls
}

DescribeAclsResponse is a describe acl response type

type DescribeClientQuotasEntry 

type DescribeClientQuotasEntry struct {
	Entity []QuotaEntityComponent // The quota entity description.
	Values map[string]float64     // The quota values for the entity.
}

type DescribeClientQuotasRequest 

type DescribeClientQuotasRequest struct {
	Version    int16
	Components []QuotaFilterComponent
	Strict     bool
}

A filter to be applied to matching client quotas. Components: the components to filter on Strict: whether the filter only includes specified components

type DescribeClientQuotasResponse 

type DescribeClientQuotasResponse struct {
	Version      int16
	ThrottleTime time.Duration               // The duration in milliseconds for which the request was throttled due to a quota violation, or zero if the request did not violate any quota.
	ErrorCode    KError                      // The error code, or `0` if the quota description succeeded.
	ErrorMsg     *string                     // The error message, or `null` if the quota description succeeded.
	Entries      []DescribeClientQuotasEntry // A result entry.
}

type DescribeConfigError 

type DescribeConfigError struct {
	Err    KError
	ErrMsg string
}

func (*DescribeConfigError) Error 

func (c *DescribeConfigError) Error() string

type DescribeConfigsRequest 

type DescribeConfigsRequest struct {
	Version         int16
	Resources       []*ConfigResource
	IncludeSynonyms bool
}

type DescribeConfigsResponse 

type DescribeConfigsResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Resources    []*ResourceResponse
}

type DescribeGroupsRequest 

type DescribeGroupsRequest struct {
	Version                     int16
	Groups                      []string
	IncludeAuthorizedOperations bool
}

func (*DescribeGroupsRequest) AddGroup 

func (r *DescribeGroupsRequest) AddGroup(group string)

type DescribeGroupsResponse 

type DescribeGroupsResponse struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ThrottleTimeMs contains the duration in milliseconds for which the
	// request was throttled due to a quota violation, or zero if the request
	// did not violate any quota.
	ThrottleTimeMs int32
	// Groups contains each described group.
	Groups []*GroupDescription
}

type DescribeLogDirsRequest 

type DescribeLogDirsRequest struct {
	// Version 0 and 1 are equal
	// The version number is bumped to indicate that on quota violation brokers send out responses before throttling.
	Version int16

	// If this is an empty array, all topics will be queried
	DescribeTopics []DescribeLogDirsRequestTopic
}

DescribeLogDirsRequest is a describe request to get partitions' log size

type DescribeLogDirsRequestTopic 

type DescribeLogDirsRequestTopic struct {
	Topic        string
	PartitionIDs []int32
}

DescribeLogDirsRequestTopic is a describe request about the log dir of one or more partitions within a Topic

type DescribeLogDirsResponse 

type DescribeLogDirsResponse struct {
	ThrottleTime time.Duration

	// Version 0 and 1 are equal
	// The version number is bumped to indicate that on quota violation brokers send out responses before throttling.
	Version int16

	LogDirs []DescribeLogDirsResponseDirMetadata
}

type DescribeLogDirsResponseDirMetadata 

type DescribeLogDirsResponseDirMetadata struct {
	ErrorCode KError

	// The absolute log directory path
	Path   string
	Topics []DescribeLogDirsResponseTopic
}

type DescribeLogDirsResponsePartition 

type DescribeLogDirsResponsePartition struct {
	PartitionID int32

	// The size of the log segments of the partition in bytes.
	Size int64

	// The lag of the log's LEO w.r.t. partition's HW (if it is the current log for the partition) or
	// current replica's LEO (if it is the future log for the partition)
	OffsetLag int64

	// True if this log is created by AlterReplicaLogDirsRequest and will replace the current log of
	// the replica in the future.
	IsTemporary bool
}

DescribeLogDirsResponsePartition describes a partition's log directory

type DescribeLogDirsResponseTopic 

type DescribeLogDirsResponseTopic struct {
	Topic      string
	Partitions []DescribeLogDirsResponsePartition
}

DescribeLogDirsResponseTopic contains a topic's partitions descriptions

type DescribeUserScramCredentialsRequest 

type DescribeUserScramCredentialsRequest struct {
	// Version 0 is currently only supported
	Version int16

	// If this is an empty array, all users will be queried
	DescribeUsers []DescribeUserScramCredentialsRequestUser
}

DescribeUserScramCredentialsRequest is a request to get list of SCRAM user names

type DescribeUserScramCredentialsRequestUser 

type DescribeUserScramCredentialsRequestUser struct {
	Name string
}

DescribeUserScramCredentialsRequestUser is a describe request about specific user name

type DescribeUserScramCredentialsResponse 

type DescribeUserScramCredentialsResponse struct {
	// Version 0 is currently only supported
	Version int16

	ThrottleTime time.Duration

	ErrorCode    KError
	ErrorMessage *string

	Results []*DescribeUserScramCredentialsResult
}

type DescribeUserScramCredentialsResult 

type DescribeUserScramCredentialsResult struct {
	User string

	ErrorCode    KError
	ErrorMessage *string

	CredentialInfos []*UserScramCredentialsResponseInfo
}

type DynamicConsistencyPartitioner 

type DynamicConsistencyPartitioner interface {
	Partitioner

	// MessageRequiresConsistency is similar to Partitioner.RequiresConsistency,
	// but takes in the message being partitioned so that the partitioner can
	// make a per-message determination.
	MessageRequiresConsistency(message *ProducerMessage) bool
}

DynamicConsistencyPartitioner can optionally be implemented by Partitioners in order to allow more flexibility than is originally allowed by the RequiresConsistency method in the Partitioner interface. This allows partitioners to require consistency sometimes, but not all times. It's useful for, e.g., the HashPartitioner, which does not require consistency if the message key is nil.

type Encoder 

type Encoder interface {
	Encode() ([]byte, error)
	Length() int
}

Encoder is a simple interface for any type that can be encoded as an array of bytes in order to be sent as the key or value of a Kafka message. Length() is provided as an optimization, and must return the same as len() on the result of Encode().

type EndTxnRequest 

type EndTxnRequest struct {
	Version           int16
	TransactionalID   string
	ProducerID        int64
	ProducerEpoch     int16
	TransactionResult bool
}

type EndTxnResponse 

type EndTxnResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Err          KError
}

type FetchRequest 

type FetchRequest struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ReplicaID contains the broker ID of the follower, of -1 if this request
	// is from a consumer.
	// ReplicaID int32
	// MaxWaitTime contains the maximum time in milliseconds to wait for the response.
	MaxWaitTime int32
	// MinBytes contains the minimum bytes to accumulate in the response.
	MinBytes int32
	// MaxBytes contains the maximum bytes to fetch.  See KIP-74 for cases
	// where this limit may not be honored.
	MaxBytes int32
	// Isolation contains a This setting controls the visibility of
	// transactional records. Using READ_UNCOMMITTED (isolation_level = 0)
	// makes all records visible. With READ_COMMITTED (isolation_level = 1),
	// non-transactional and COMMITTED transactional records are visible. To be
	// more concrete, READ_COMMITTED returns all data from offsets smaller than
	// the current LSO (last stable offset), and enables the inclusion of the
	// list of aborted transactions in the result, which allows consumers to
	// discard ABORTED transactional records
	Isolation IsolationLevel
	// SessionID contains the fetch session ID.
	SessionID int32
	// SessionEpoch contains the epoch of the partition leader as known to the
	// follower replica or a consumer.
	SessionEpoch int32

	// RackID contains a Rack ID of the consumer making this request
	RackID string
	// contains filtered or unexported fields
}

FetchRequest (API key 1) will fetch Kafka messages. Version 3 introduced the MaxBytes field. See https://issues.apache.org/jira/browse/KAFKA-2063 for a discussion of the issues leading up to that. The KIP is at https://cwiki.apache.org/confluence/display/KAFKA/KIP-74%3A+Add+Fetch+Response+Size+Limit+in+Bytes

func (*FetchRequest) AddBlock 

func (r *FetchRequest) AddBlock(topic string, partitionID int32, fetchOffset int64, maxBytes int32, leaderEpoch int32)

type FetchResponse 

type FetchResponse struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ThrottleTime contains the duration in milliseconds for which the request
	// was throttled due to a quota violation, or zero if the request did not
	// violate any quota.
	ThrottleTime time.Duration
	// ErrorCode contains the top level response error code.
	ErrorCode int16
	// SessionID contains the fetch session ID, or 0 if this is not part of a fetch session.
	SessionID int32
	// Blocks contains the response topics.
	Blocks map[string]map[int32]*FetchResponseBlock

	LogAppendTime bool
	Timestamp     time.Time
}

func (*FetchResponse) AddControlRecord 

func (r *FetchResponse) AddControlRecord(topic string, partition int32, offset int64, producerID int64, recordType ControlRecordType)

func (*FetchResponse) AddControlRecordWithTimestamp 

func (r *FetchResponse) AddControlRecordWithTimestamp(topic string, partition int32, offset int64, producerID int64, recordType ControlRecordType, timestamp time.Time)

func (*FetchResponse) AddError 

func (r *FetchResponse) AddError(topic string, partition int32, err KError)

func (*FetchResponse) AddMessage 

func (r *FetchResponse) AddMessage(topic string, partition int32, key, value Encoder, offset int64)

func (*FetchResponse) AddMessageWithTimestamp 

func (r *FetchResponse) AddMessageWithTimestamp(topic string, partition int32, key, value Encoder, offset int64, timestamp time.Time, version int8)

func (*FetchResponse) AddRecord 

func (r *FetchResponse) AddRecord(topic string, partition int32, key, value Encoder, offset int64)

func (*FetchResponse) AddRecordBatch 

func (r *FetchResponse) AddRecordBatch(topic string, partition int32, key, value Encoder, offset int64, producerID int64, isTransactional bool)

func (*FetchResponse) AddRecordBatchWithTimestamp 

func (r *FetchResponse) AddRecordBatchWithTimestamp(topic string, partition int32, key, value Encoder, offset int64, producerID int64, isTransactional bool, timestamp time.Time)

AddRecordBatchWithTimestamp is similar to AddRecordWithTimestamp But instead of appending 1 record to a batch, it append a new batch containing 1 record to the fetchResponse Since transaction are handled on batch level (the whole batch is either committed or aborted), use this to test transactions

func (*FetchResponse) AddRecordWithTimestamp 

func (r *FetchResponse) AddRecordWithTimestamp(topic string, partition int32, key, value Encoder, offset int64, timestamp time.Time)

func (*FetchResponse) GetBlock 

func (r *FetchResponse) GetBlock(topic string, partition int32) *FetchResponseBlock

func (*FetchResponse) SetLastOffsetDelta 

func (r *FetchResponse) SetLastOffsetDelta(topic string, partition int32, offset int32)

func (*FetchResponse) SetLastStableOffset 

func (r *FetchResponse) SetLastStableOffset(topic string, partition int32, offset int64)

type FetchResponseBlock 

type FetchResponseBlock struct {
	// Err contains the error code, or 0 if there was no fetch error.
	Err KError
	// HighWatermarkOffset contains the current high water mark.
	HighWaterMarkOffset int64
	// LastStableOffset contains the last stable offset (or LSO) of the
	// partition. This is the last offset such that the state of all
	// transactional records prior to this offset have been decided (ABORTED or
	// COMMITTED)
	LastStableOffset       int64
	LastRecordsBatchOffset *int64
	// LogStartOffset contains the current log start offset.
	LogStartOffset int64
	// AbortedTransactions contains the aborted transactions.
	AbortedTransactions []*AbortedTransaction
	// PreferredReadReplica contains the preferred read replica for the
	// consumer to use on its next fetch request
	PreferredReadReplica int32
	// RecordsSet contains the record data.
	RecordsSet []*Records

	Partial bool
	Records *Records // deprecated: use FetchResponseBlock.RecordsSet
}

type FilterResponse 

type FilterResponse struct {
	Err          KError
	ErrMsg       *string
	MatchingAcls []*MatchingAcl
}

FilterResponse is a filter response type

type FindCoordinatorRequest 

type FindCoordinatorRequest struct {
	Version         int16
	CoordinatorKey  string
	CoordinatorType CoordinatorType
}

type FindCoordinatorResponse 

type FindCoordinatorResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Err          KError
	ErrMsg       *string
	Coordinator  *Broker
}

type GSSAPIConfig 

type GSSAPIConfig struct {
	AuthType           int
	KeyTabPath         string
	CCachePath         string
	KerberosConfigPath string
	ServiceName        string
	Username           string
	Password           string
	Realm              string
	DisablePAFXFAST    bool
	BuildSpn           BuildSpnFunc
}

type GSSAPIKerberosAuth 

type GSSAPIKerberosAuth struct {
	Config *GSSAPIConfig

	NewKerberosClientFunc func(config *GSSAPIConfig) (KerberosClient, error)
	// contains filtered or unexported fields
}

func (*GSSAPIKerberosAuth) Authorize 

func (krbAuth *GSSAPIKerberosAuth) Authorize(broker *Broker) error

This does the handshake for authorization

type GSSApiHandlerFunc 

type GSSApiHandlerFunc func([]byte) []byte

type GroupData 

type GroupData struct {
	GroupState string // version 4 or later
}

type GroupDescription 

type GroupDescription struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// Err contains the describe error as the KError type.
	Err KError
	// ErrorCode contains the describe error, or 0 if there was no error.
	ErrorCode int16
	// GroupId contains the group ID string.
	GroupId string
	// State contains the group state string, or the empty string.
	State string
	// ProtocolType contains the group protocol type, or the empty string.
	ProtocolType string
	// Protocol contains the group protocol data, or the empty string.
	Protocol string
	// Members contains the group members.
	Members map[string]*GroupMemberDescription
	// AuthorizedOperations contains a 32-bit bitfield to represent authorized
	// operations for this group.
	AuthorizedOperations int32
}

GroupDescription contains each described group.

type GroupMember 

type GroupMember struct {
	// MemberId contains the group member ID.
	MemberId string
	// GroupInstanceId contains the unique identifier of the consumer instance
	// provided by end user.
	GroupInstanceId *string
	// Metadata contains the group member metadata.
	Metadata []byte
}

type GroupMemberDescription 

type GroupMemberDescription struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// MemberId contains the member ID assigned by the group coordinator.
	MemberId string
	// GroupInstanceId contains the unique identifier of the consumer instance
	// provided by end user.
	GroupInstanceId *string
	// ClientId contains the client ID used in the member's latest join group
	// request.
	ClientId string
	// ClientHost contains the client host.
	ClientHost string
	// MemberMetadata contains the metadata corresponding to the current group
	// protocol in use.
	MemberMetadata []byte
	// MemberAssignment contains the current assignment provided by the group
	// leader.
	MemberAssignment []byte
}

GroupMemberDescription contains the group members.

func (*GroupMemberDescription) GetMemberAssignment 

func (gmd *GroupMemberDescription) GetMemberAssignment() (*ConsumerGroupMemberAssignment, error)

func (*GroupMemberDescription) GetMemberMetadata 

func (gmd *GroupMemberDescription) GetMemberMetadata() (*ConsumerGroupMemberMetadata, error)

type GroupProtocol 

type GroupProtocol struct {
	// Name contains the protocol name.
	Name string
	// Metadata contains the protocol metadata.
	Metadata []byte
}

type HashPartitionerOption 

type HashPartitionerOption func(*hashPartitioner)

HashPartitionerOption lets you modify default values of the partitioner

func WithAbsFirst 

func WithAbsFirst() HashPartitionerOption

WithAbsFirst means that the partitioner handles absolute values in the same way as the reference Java implementation

func WithCustomFallbackPartitioner 

func WithCustomFallbackPartitioner(randomHP Partitioner) HashPartitionerOption

WithCustomFallbackPartitioner lets you specify what HashPartitioner should be used in case a Distribution Key is empty

func WithCustomHashFunction 

func WithCustomHashFunction(hasher func() hash.Hash32) HashPartitionerOption

WithCustomHashFunction lets you specify what hash function to use for the partitioning

func WithHashUnsigned 

func WithHashUnsigned() HashPartitionerOption

WithHashUnsigned means the partitioner treats the hashed value as unsigned when partitioning. This is intended to be combined with the crc32 hash algorithm to be compatible with librdkafka's implementation

type HeartbeatRequest 

type HeartbeatRequest struct {
	Version         int16
	GroupId         string
	GenerationId    int32
	MemberId        string
	GroupInstanceId *string
}

type HeartbeatResponse 

type HeartbeatResponse struct {
	Version      int16
	ThrottleTime int32
	Err          KError
}

type IncrementalAlterConfigsEntry 

type IncrementalAlterConfigsEntry struct {
	Operation IncrementalAlterConfigsOperation
	Value     *string
}

type IncrementalAlterConfigsOperation 

type IncrementalAlterConfigsOperation int8
const (
	IncrementalAlterConfigsOperationSet IncrementalAlterConfigsOperation = iota
	IncrementalAlterConfigsOperationDelete
	IncrementalAlterConfigsOperationAppend
	IncrementalAlterConfigsOperationSubtract
)

type IncrementalAlterConfigsRequest 

type IncrementalAlterConfigsRequest struct {
	Version      int16
	Resources    []*IncrementalAlterConfigsResource
	ValidateOnly bool
}

IncrementalAlterConfigsRequest is an incremental alter config request type

type IncrementalAlterConfigsResource 

type IncrementalAlterConfigsResource struct {
	Type          ConfigResourceType
	Name          string
	ConfigEntries map[string]IncrementalAlterConfigsEntry
}

type IncrementalAlterConfigsResponse 

type IncrementalAlterConfigsResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Resources    []*AlterConfigsResourceResponse
}

IncrementalAlterConfigsResponse is a response type for incremental alter config

type InitProducerIDRequest 

type InitProducerIDRequest struct {
	Version            int16
	TransactionalID    *string
	TransactionTimeout time.Duration
	ProducerID         int64
	ProducerEpoch      int16
}

type InitProducerIDResponse 

type InitProducerIDResponse struct {
	ThrottleTime  time.Duration
	Err           KError
	Version       int16
	ProducerID    int64
	ProducerEpoch int16
}

type IsolationLevel 

type IsolationLevel int8
const (
	ReadUncommitted IsolationLevel = iota
	ReadCommitted
)

type JoinGroupRequest 

type JoinGroupRequest struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// GroupId contains the group identifier.
	GroupId string
	// SessionTimeout specifies that the coordinator should consider the consumer
	// dead if it receives no heartbeat after this timeout in milliseconds.
	SessionTimeout int32
	// RebalanceTimeout contains the maximum time in milliseconds that the
	// coordinator will wait for each member to rejoin when rebalancing the
	// group.
	RebalanceTimeout int32
	// MemberId contains the member id assigned by the group coordinator.
	MemberId string
	// GroupInstanceId contains the unique identifier of the consumer instance
	// provided by end user.
	GroupInstanceId *string
	// ProtocolType contains the unique name the for class of protocols
	// implemented by the group we want to join.
	ProtocolType string
	// GroupProtocols contains the list of protocols that the member supports.
	// deprecated; use OrderedGroupProtocols
	GroupProtocols map[string][]byte
	// OrderedGroupProtocols contains an ordered list of protocols that the member
	// supports.
	OrderedGroupProtocols []*GroupProtocol
}

func (*JoinGroupRequest) AddGroupProtocol 

func (r *JoinGroupRequest) AddGroupProtocol(name string, metadata []byte)

func (*JoinGroupRequest) AddGroupProtocolMetadata 

func (r *JoinGroupRequest) AddGroupProtocolMetadata(name string, metadata *ConsumerGroupMemberMetadata) error

type JoinGroupResponse 

type JoinGroupResponse struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ThrottleTime contains the duration for which the request was throttled due
	// to a quota violation, or zero if the request did not violate any quota.
	ThrottleTime int32
	// Err contains the error code, or 0 if there was no error.
	Err KError
	// GenerationId contains the generation ID of the group.
	GenerationId int32
	// GroupProtocol contains the group protocol selected by the coordinator.
	GroupProtocol string
	// LeaderId contains the leader of the group.
	LeaderId string
	// MemberId contains the member ID assigned by the group coordinator.
	MemberId string
	// Members contains the per-group-member information.
	Members []GroupMember
}

func (*JoinGroupResponse) GetMembers 

func (r *JoinGroupResponse) GetMembers() (map[string]ConsumerGroupMemberMetadata, error)

type KError 

type KError int16

KError is the type of error that can be returned directly by the Kafka broker. See https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-ErrorCodes 

const (
	ErrUnknown                            KError = -1 // Errors.UNKNOWN_SERVER_ERROR
	ErrNoError                            KError = 0  // Errors.NONE
	ErrOffsetOutOfRange                   KError = 1  // Errors.OFFSET_OUT_OF_RANGE
	ErrInvalidMessage                     KError = 2  // Errors.CORRUPT_MESSAGE
	ErrUnknownTopicOrPartition            KError = 3  // Errors.UNKNOWN_TOPIC_OR_PARTITION
	ErrInvalidMessageSize                 KError = 4  // Errors.INVALID_FETCH_SIZE
	ErrLeaderNotAvailable                 KError = 5  // Errors.LEADER_NOT_AVAILABLE
	ErrNotLeaderForPartition              KError = 6  // Errors.NOT_LEADER_OR_FOLLOWER
	ErrRequestTimedOut                    KError = 7  // Errors.REQUEST_TIMED_OUT
	ErrBrokerNotAvailable                 KError = 8  // Errors.BROKER_NOT_AVAILABLE
	ErrReplicaNotAvailable                KError = 9  // Errors.REPLICA_NOT_AVAILABLE
	ErrMessageSizeTooLarge                KError = 10 // Errors.MESSAGE_TOO_LARGE
	ErrStaleControllerEpochCode           KError = 11 // Errors.STALE_CONTROLLER_EPOCH
	ErrOffsetMetadataTooLarge             KError = 12 // Errors.OFFSET_METADATA_TOO_LARGE
	ErrNetworkException                   KError = 13 // Errors.NETWORK_EXCEPTION
	ErrOffsetsLoadInProgress              KError = 14 // Errors.COORDINATOR_LOAD_IN_PROGRESS
	ErrConsumerCoordinatorNotAvailable    KError = 15 // Errors.COORDINATOR_NOT_AVAILABLE
	ErrNotCoordinatorForConsumer          KError = 16 // Errors.NOT_COORDINATOR
	ErrInvalidTopic                       KError = 17 // Errors.INVALID_TOPIC_EXCEPTION
	ErrMessageSetSizeTooLarge             KError = 18 // Errors.RECORD_LIST_TOO_LARGE
	ErrNotEnoughReplicas                  KError = 19 // Errors.NOT_ENOUGH_REPLICAS
	ErrNotEnoughReplicasAfterAppend       KError = 20 // Errors.NOT_ENOUGH_REPLICAS_AFTER_APPEND
	ErrInvalidRequiredAcks                KError = 21 // Errors.INVALID_REQUIRED_ACKS
	ErrIllegalGeneration                  KError = 22 // Errors.ILLEGAL_GENERATION
	ErrInconsistentGroupProtocol          KError = 23 // Errors.INCONSISTENT_GROUP_PROTOCOL
	ErrInvalidGroupId                     KError = 24 // Errors.INVALID_GROUP_ID
	ErrUnknownMemberId                    KError = 25 // Errors.UNKNOWN_MEMBER_ID
	ErrInvalidSessionTimeout              KError = 26 // Errors.INVALID_SESSION_TIMEOUT
	ErrRebalanceInProgress                KError = 27 // Errors.REBALANCE_IN_PROGRESS
	ErrInvalidCommitOffsetSize            KError = 28 // Errors.INVALID_COMMIT_OFFSET_SIZE
	ErrTopicAuthorizationFailed           KError = 29 // Errors.TOPIC_AUTHORIZATION_FAILED
	ErrGroupAuthorizationFailed           KError = 30 // Errors.GROUP_AUTHORIZATION_FAILED
	ErrClusterAuthorizationFailed         KError = 31 // Errors.CLUSTER_AUTHORIZATION_FAILED
	ErrInvalidTimestamp                   KError = 32 // Errors.INVALID_TIMESTAMP
	ErrUnsupportedSASLMechanism           KError = 33 // Errors.UNSUPPORTED_SASL_MECHANISM
	ErrIllegalSASLState                   KError = 34 // Errors.ILLEGAL_SASL_STATE
	ErrUnsupportedVersion                 KError = 35 // Errors.UNSUPPORTED_VERSION
	ErrTopicAlreadyExists                 KError = 36 // Errors.TOPIC_ALREADY_EXISTS
	ErrInvalidPartitions                  KError = 37 // Errors.INVALID_PARTITIONS
	ErrInvalidReplicationFactor           KError = 38 // Errors.INVALID_REPLICATION_FACTOR
	ErrInvalidReplicaAssignment           KError = 39 // Errors.INVALID_REPLICA_ASSIGNMENT
	ErrInvalidConfig                      KError = 40 // Errors.INVALID_CONFIG
	ErrNotController                      KError = 41 // Errors.NOT_CONTROLLER
	ErrInvalidRequest                     KError = 42 // Errors.INVALID_REQUEST
	ErrUnsupportedForMessageFormat        KError = 43 // Errors.UNSUPPORTED_FOR_MESSAGE_FORMAT
	ErrPolicyViolation                    KError = 44 // Errors.POLICY_VIOLATION
	ErrOutOfOrderSequenceNumber           KError = 45 // Errors.OUT_OF_ORDER_SEQUENCE_NUMBER
	ErrDuplicateSequenceNumber            KError = 46 // Errors.DUPLICATE_SEQUENCE_NUMBER
	ErrInvalidProducerEpoch               KError = 47 // Errors.INVALID_PRODUCER_EPOCH
	ErrInvalidTxnState                    KError = 48 // Errors.INVALID_TXN_STATE
	ErrInvalidProducerIDMapping           KError = 49 // Errors.INVALID_PRODUCER_ID_MAPPING
	ErrInvalidTransactionTimeout          KError = 50 // Errors.INVALID_TRANSACTION_TIMEOUT
	ErrConcurrentTransactions             KError = 51 // Errors.CONCURRENT_TRANSACTIONS
	ErrTransactionCoordinatorFenced       KError = 52 // Errors.TRANSACTION_COORDINATOR_FENCED
	ErrTransactionalIDAuthorizationFailed KError = 53 // Errors.TRANSACTIONAL_ID_AUTHORIZATION_FAILED
	ErrSecurityDisabled                   KError = 54 // Errors.SECURITY_DISABLED
	ErrOperationNotAttempted              KError = 55 // Errors.OPERATION_NOT_ATTEMPTED
	ErrKafkaStorageError                  KError = 56 // Errors.KAFKA_STORAGE_ERROR
	ErrLogDirNotFound                     KError = 57 // Errors.LOG_DIR_NOT_FOUND
	ErrSASLAuthenticationFailed           KError = 58 // Errors.SASL_AUTHENTICATION_FAILED
	ErrUnknownProducerID                  KError = 59 // Errors.UNKNOWN_PRODUCER_ID
	ErrReassignmentInProgress             KError = 60 // Errors.REASSIGNMENT_IN_PROGRESS
	ErrDelegationTokenAuthDisabled        KError = 61 // Errors.DELEGATION_TOKEN_AUTH_DISABLED
	ErrDelegationTokenNotFound            KError = 62 // Errors.DELEGATION_TOKEN_NOT_FOUND
	ErrDelegationTokenOwnerMismatch       KError = 63 // Errors.DELEGATION_TOKEN_OWNER_MISMATCH
	ErrDelegationTokenRequestNotAllowed   KError = 64 // Errors.DELEGATION_TOKEN_REQUEST_NOT_ALLOWED
	ErrDelegationTokenAuthorizationFailed KError = 65 // Errors.DELEGATION_TOKEN_AUTHORIZATION_FAILED
	ErrDelegationTokenExpired             KError = 66 // Errors.DELEGATION_TOKEN_EXPIRED
	ErrInvalidPrincipalType               KError = 67 // Errors.INVALID_PRINCIPAL_TYPE
	ErrNonEmptyGroup                      KError = 68 // Errors.NON_EMPTY_GROUP
	ErrGroupIDNotFound                    KError = 69 // Errors.GROUP_ID_NOT_FOUND
	ErrFetchSessionIDNotFound             KError = 70 // Errors.FETCH_SESSION_ID_NOT_FOUND
	ErrInvalidFetchSessionEpoch           KError = 71 // Errors.INVALID_FETCH_SESSION_EPOCH
	ErrListenerNotFound                   KError = 72 // Errors.LISTENER_NOT_FOUND
	ErrTopicDeletionDisabled              KError = 73 // Errors.TOPIC_DELETION_DISABLED
	ErrFencedLeaderEpoch                  KError = 74 // Errors.FENCED_LEADER_EPOCH
	ErrUnknownLeaderEpoch                 KError = 75 // Errors.UNKNOWN_LEADER_EPOCH
	ErrUnsupportedCompressionType         KError = 76 // Errors.UNSUPPORTED_COMPRESSION_TYPE
	ErrStaleBrokerEpoch                   KError = 77 // Errors.STALE_BROKER_EPOCH
	ErrOffsetNotAvailable                 KError = 78 // Errors.OFFSET_NOT_AVAILABLE
	ErrMemberIdRequired                   KError = 79 // Errors.MEMBER_ID_REQUIRED
	ErrPreferredLeaderNotAvailable        KError = 80 // Errors.PREFERRED_LEADER_NOT_AVAILABLE
	ErrGroupMaxSizeReached                KError = 81 // Errors.GROUP_MAX_SIZE_REACHED
	ErrFencedInstancedId                  KError = 82 // Errors.FENCED_INSTANCE_ID
	ErrEligibleLeadersNotAvailable        KError = 83 // Errors.ELIGIBLE_LEADERS_NOT_AVAILABLE
	ErrElectionNotNeeded                  KError = 84 // Errors.ELECTION_NOT_NEEDED
	ErrNoReassignmentInProgress           KError = 85 // Errors.NO_REASSIGNMENT_IN_PROGRESS
	ErrGroupSubscribedToTopic             KError = 86 // Errors.GROUP_SUBSCRIBED_TO_TOPIC
	ErrInvalidRecord                      KError = 87 // Errors.INVALID_RECORD
	ErrUnstableOffsetCommit               KError = 88 // Errors.UNSTABLE_OFFSET_COMMIT
	ErrThrottlingQuotaExceeded            KError = 89 // Errors.THROTTLING_QUOTA_EXCEEDED
	ErrProducerFenced                     KError = 90 // Errors.PRODUCER_FENCED
)

Numeric error codes returned by the Kafka server.

func (KError) Error 

func (err KError) Error() string

type KafkaGSSAPIHandler 

type KafkaGSSAPIHandler struct {
	// contains filtered or unexported fields
}

func (*KafkaGSSAPIHandler) MockKafkaGSSAPI 

func (h *KafkaGSSAPIHandler) MockKafkaGSSAPI(buffer []byte) []byte

type KafkaVersion 

type KafkaVersion struct {
	// contains filtered or unexported fields
}

KafkaVersion instances represent versions of the upstream Kafka broker.

func ParseKafkaVersion 

func ParseKafkaVersion(s string) (KafkaVersion, error)

ParseKafkaVersion parses and returns kafka version or error from a string

func (KafkaVersion) IsAtLeast 

func (v KafkaVersion) IsAtLeast(other KafkaVersion) bool

IsAtLeast return true if and only if the version it is called on is greater than or equal to the version passed in: 

V1.IsAtLeast(V2) // false
V2.IsAtLeast(V1) // true

func (KafkaVersion) String 

func (v KafkaVersion) String() string

type KerberosClient 

type KerberosClient interface {
	Login() error
	GetServiceTicket(spn string) (messages.Ticket, types.EncryptionKey, error)
	Domain() string
	CName() types.PrincipalName
	Destroy()
}

func NewKerberosClient 

func NewKerberosClient(config *GSSAPIConfig) (KerberosClient, error)

NewKerberosClient creates kerberos client used to obtain TGT and TGS tokens. It uses pure go Kerberos 5 solution (RFC-4121 and RFC-4120). uses gokrb5 library underlying which is a pure go kerberos client with some GSS-API capabilities.

type KerberosGoKrb5Client 

type KerberosGoKrb5Client struct {
	krb5client.Client
}

func (*KerberosGoKrb5Client) CName 

func (c *KerberosGoKrb5Client) CName() types.PrincipalName

func (*KerberosGoKrb5Client) Domain 

func (c *KerberosGoKrb5Client) Domain() string

type LeaveGroupRequest 

type LeaveGroupRequest struct {
	Version  int16
	GroupId  string
	MemberId string           // Removed in Version 3
	Members  []MemberIdentity // Added in Version 3
}

type LeaveGroupResponse 

type LeaveGroupResponse struct {
	Version      int16
	ThrottleTime int32
	Err          KError
	Members      []MemberResponse
}

type ListGroupsRequest 

type ListGroupsRequest struct {
	Version      int16
	StatesFilter []string // version 4 or later
}

type ListGroupsResponse 

type ListGroupsResponse struct {
	Version      int16
	ThrottleTime int32
	Err          KError
	Groups       map[string]string
	GroupsData   map[string]GroupData // version 4 or later
}

type ListPartitionReassignmentsRequest 

type ListPartitionReassignmentsRequest struct {
	TimeoutMs int32

	Version int16
	// contains filtered or unexported fields
}

func (*ListPartitionReassignmentsRequest) AddBlock 

func (r *ListPartitionReassignmentsRequest) AddBlock(topic string, partitionIDs []int32)

type ListPartitionReassignmentsResponse 

type ListPartitionReassignmentsResponse struct {
	Version        int16
	ThrottleTimeMs int32
	ErrorCode      KError
	ErrorMessage   *string
	TopicStatus    map[string]map[int32]*PartitionReplicaReassignmentsStatus
}

func (*ListPartitionReassignmentsResponse) AddBlock 

func (r *ListPartitionReassignmentsResponse) AddBlock(topic string, partition int32, replicas, addingReplicas, removingReplicas []int32)

type MatchingAcl 

type MatchingAcl struct {
	Err    KError
	ErrMsg *string
	Resource
	Acl
}

MatchingAcl is a matching acl type

type MemberIdentity 

type MemberIdentity struct {
	MemberId        string
	GroupInstanceId *string
}

type MemberResponse 

type MemberResponse struct {
	MemberId        string
	GroupInstanceId *string
	Err             KError
}

type Message 

type Message struct {
	Codec            CompressionCodec // codec used to compress the message contents
	CompressionLevel int              // compression level
	LogAppendTime    bool             // the used timestamp is LogAppendTime
	Key              []byte           // the message key, may be nil
	Value            []byte           // the message contents
	Set              *MessageSet      // the message set a message might wrap
	Version          int8             // v1 requires Kafka 0.10
	Timestamp        time.Time        // the timestamp of the message (version 1+ only)
	// contains filtered or unexported fields
}

Message is a kafka message type

type MessageBlock 

type MessageBlock struct {
	Offset int64
	Msg    *Message
}

func (*MessageBlock) Messages 

func (msb *MessageBlock) Messages() []*MessageBlock

Messages convenience helper which returns either all the messages that are wrapped in this block

type MessageSet 

type MessageSet struct {
	PartialTrailingMessage bool // whether the set on the wire contained an incomplete trailing MessageBlock
	OverflowMessage        bool // whether the set on the wire contained an overflow message
	Messages               []*MessageBlock
}

type MetadataRequest 

type MetadataRequest struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// Topics contains the topics to fetch metadata for.
	Topics []string
	// AllowAutoTopicCreation contains a If this is true, the broker may auto-create topics that we requested which do not already exist, if it is configured to do so.
	AllowAutoTopicCreation             bool
	IncludeClusterAuthorizedOperations bool // version 8 and up
	IncludeTopicAuthorizedOperations   bool // version 8 and up
}

func NewMetadataRequest 

func NewMetadataRequest(version KafkaVersion, topics []string) *MetadataRequest

type MetadataResponse 

type MetadataResponse struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ThrottleTimeMs contains the duration in milliseconds for which the request was throttled due to a quota violation, or zero if the request did not violate any quota.
	ThrottleTimeMs int32
	// Brokers contains each broker in the response.
	Brokers []*Broker
	// ClusterID contains the cluster ID that responding broker belongs to.
	ClusterID *string
	// ControllerID contains the ID of the controller broker.
	ControllerID int32
	// Topics contains each topic in the response.
	Topics                      []*TopicMetadata
	ClusterAuthorizedOperations int32 // Only valid for Version >= 8
}

func (*MetadataResponse) AddBroker 

func (r *MetadataResponse) AddBroker(addr string, id int32)

func (*MetadataResponse) AddTopic 

func (r *MetadataResponse) AddTopic(topic string, err KError) *TopicMetadata

func (*MetadataResponse) AddTopicPartition 

func (r *MetadataResponse) AddTopicPartition(topic string, partition, brokerID int32, replicas, isr []int32, offline []int32, err KError)

type MockAlterConfigsResponse 

type MockAlterConfigsResponse struct {
	// contains filtered or unexported fields
}

func NewMockAlterConfigsResponse 

func NewMockAlterConfigsResponse(t TestReporter) *MockAlterConfigsResponse

func (*MockAlterConfigsResponse) For 

func (mr *MockAlterConfigsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockAlterConfigsResponseWithErrorCode 

type MockAlterConfigsResponseWithErrorCode struct {
	// contains filtered or unexported fields
}

func NewMockAlterConfigsResponseWithErrorCode 

func NewMockAlterConfigsResponseWithErrorCode(t TestReporter) *MockAlterConfigsResponseWithErrorCode

func (*MockAlterConfigsResponseWithErrorCode) For 

func (mr *MockAlterConfigsResponseWithErrorCode) For(reqBody versionedDecoder) encoderWithHeader

type MockAlterPartitionReassignmentsResponse 

type MockAlterPartitionReassignmentsResponse struct {
	// contains filtered or unexported fields
}

func NewMockAlterPartitionReassignmentsResponse 

func NewMockAlterPartitionReassignmentsResponse(t TestReporter) *MockAlterPartitionReassignmentsResponse

func (*MockAlterPartitionReassignmentsResponse) For 

func (mr *MockAlterPartitionReassignmentsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockApiVersionsResponse 

type MockApiVersionsResponse struct {
	// contains filtered or unexported fields
}

func NewMockApiVersionsResponse 

func NewMockApiVersionsResponse(t TestReporter) *MockApiVersionsResponse

func (*MockApiVersionsResponse) For 

func (m *MockApiVersionsResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockApiVersionsResponse) SetApiKeys 

func (m *MockApiVersionsResponse) SetApiKeys(apiKeys []ApiVersionsResponseKey) *MockApiVersionsResponse

type MockBroker 

type MockBroker struct {
	// contains filtered or unexported fields
}

MockBroker is a mock Kafka broker that is used in unit tests. It is exposed to facilitate testing of higher level or specialized consumers and producers built on top of Sarama. Note that it does not 'mimic' the Kafka API protocol, but rather provides a facility to do that. It takes care of the TCP transport, request unmarshalling, response marshaling, and makes it the test writer responsibility to program correct according to the Kafka API protocol MockBroker behavior.

MockBroker is implemented as a TCP server listening on a kernel-selected localhost port that can accept many connections. It reads Kafka requests from that connection and returns responses programmed by the SetHandlerByMap function. If a MockBroker receives a request that it has no programmed response for, then it returns nothing and the request times out.

A set of MockRequest builders to define mappings used by MockBroker is provided by Sarama. But users can develop MockRequests of their own and use them along with or instead of the standard ones.

When running tests with MockBroker it is strongly recommended to specify a timeout to `go test` so that if the broker hangs waiting for a response, the test panics.

It is not necessary to prefix message length or correlation ID to your response bytes, the server does that automatically as a convenience.

func NewMockBroker 

func NewMockBroker(t TestReporter, brokerID int32) *MockBroker

NewMockBroker launches a fake Kafka broker. It takes a TestReporter as provided by the test framework and a channel of responses to use. If an error occurs it is simply logged to the TestReporter and the broker exits.

func NewMockBrokerAddr 

func NewMockBrokerAddr(t TestReporter, brokerID int32, addr string) *MockBroker

NewMockBrokerAddr behaves like newMockBroker but listens on the address you give it rather than just some ephemeral port.

func NewMockBrokerListener 

func NewMockBrokerListener(t TestReporter, brokerID int32, listener net.Listener) *MockBroker

NewMockBrokerListener behaves like newMockBrokerAddr but accepts connections on the listener specified.

func (*MockBroker) Addr 

func (b *MockBroker) Addr() string

Addr returns the broker connection string in the form "<address>:<port>".

func (*MockBroker) BrokerID 

func (b *MockBroker) BrokerID() int32

BrokerID returns broker ID assigned to the broker.

func (*MockBroker) Close 

func (b *MockBroker) Close()

Close terminates the broker blocking until it stops internal goroutines and releases all resources.

func (*MockBroker) History 

func (b *MockBroker) History() []RequestResponse

History returns a slice of RequestResponse pairs in the order they were processed by the broker. Note that in case of multiple connections to the broker the order expected by a test can be different from the order recorded in the history, unless some synchronization is implemented in the test.

func (*MockBroker) Port 

func (b *MockBroker) Port() int32

Port returns the TCP port number the broker is listening for requests on.

func (*MockBroker) Returns 

func (b *MockBroker) Returns(e encoderWithHeader)

func (*MockBroker) SetGSSAPIHandler 

func (b *MockBroker) SetGSSAPIHandler(handler GSSApiHandlerFunc)

func (*MockBroker) SetHandlerByMap 

func (b *MockBroker) SetHandlerByMap(handlerMap map[string]MockResponse)

SetHandlerByMap defines mapping of Request types to MockResponses. When a request is received by the broker, it looks up the request type in the map and uses the found MockResponse instance to generate an appropriate reply. If the request type is not found in the map then nothing is sent.

func (*MockBroker) SetHandlerFuncByMap 

func (b *MockBroker) SetHandlerFuncByMap(handlerMap map[string]requestHandlerFunc)

SetHandlerFuncByMap defines mapping of Request types to RequestHandlerFunc. When a request is received by the broker, it looks up the request type in the map and invoke the found RequestHandlerFunc instance to generate an appropriate reply.

func (*MockBroker) SetLatency 

func (b *MockBroker) SetLatency(latency time.Duration)

SetLatency makes broker pause for the specified period every time before replying.

func (*MockBroker) SetNotifier 

func (b *MockBroker) SetNotifier(notifier RequestNotifierFunc)

SetNotifier set a function that will get invoked whenever a request has been processed successfully and will provide the number of bytes read and written

type MockConsumerMetadataResponse 

type MockConsumerMetadataResponse struct {
	// contains filtered or unexported fields
}

MockConsumerMetadataResponse is a `ConsumerMetadataResponse` builder.

func NewMockConsumerMetadataResponse 

func NewMockConsumerMetadataResponse(t TestReporter) *MockConsumerMetadataResponse

func (*MockConsumerMetadataResponse) For 

func (mr *MockConsumerMetadataResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockConsumerMetadataResponse) SetCoordinator 

func (mr *MockConsumerMetadataResponse) SetCoordinator(group string, broker *MockBroker) *MockConsumerMetadataResponse

func (*MockConsumerMetadataResponse) SetError 

func (mr *MockConsumerMetadataResponse) SetError(group string, kerror KError) *MockConsumerMetadataResponse

type MockCreateAclsResponse 

type MockCreateAclsResponse struct {
	// contains filtered or unexported fields
}

func NewMockCreateAclsResponse 

func NewMockCreateAclsResponse(t TestReporter) *MockCreateAclsResponse

func (*MockCreateAclsResponse) For 

func (mr *MockCreateAclsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockCreateAclsResponseError 

type MockCreateAclsResponseError struct {
	// contains filtered or unexported fields
}

func NewMockCreateAclsResponseWithError 

func NewMockCreateAclsResponseWithError(t TestReporter) *MockCreateAclsResponseError

func (*MockCreateAclsResponseError) For 

func (mr *MockCreateAclsResponseError) For(reqBody versionedDecoder) encoderWithHeader

type MockCreatePartitionsResponse 

type MockCreatePartitionsResponse struct {
	// contains filtered or unexported fields
}

func NewMockCreatePartitionsResponse 

func NewMockCreatePartitionsResponse(t TestReporter) *MockCreatePartitionsResponse

func (*MockCreatePartitionsResponse) For 

func (mr *MockCreatePartitionsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockCreateTopicsResponse 

type MockCreateTopicsResponse struct {
	// contains filtered or unexported fields
}

func NewMockCreateTopicsResponse 

func NewMockCreateTopicsResponse(t TestReporter) *MockCreateTopicsResponse

func (*MockCreateTopicsResponse) For 

func (mr *MockCreateTopicsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockDeleteAclsResponse 

type MockDeleteAclsResponse struct {
	// contains filtered or unexported fields
}

func NewMockDeleteAclsResponse 

func NewMockDeleteAclsResponse(t TestReporter) *MockDeleteAclsResponse

func (*MockDeleteAclsResponse) For 

func (mr *MockDeleteAclsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockDeleteGroupsResponse 

type MockDeleteGroupsResponse struct {
	// contains filtered or unexported fields
}

func NewMockDeleteGroupsRequest 

func NewMockDeleteGroupsRequest(t TestReporter) *MockDeleteGroupsResponse

func (*MockDeleteGroupsResponse) For 

func (m *MockDeleteGroupsResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockDeleteGroupsResponse) SetDeletedGroups 

func (m *MockDeleteGroupsResponse) SetDeletedGroups(groups []string) *MockDeleteGroupsResponse

type MockDeleteOffsetResponse 

type MockDeleteOffsetResponse struct {
	// contains filtered or unexported fields
}

func NewMockDeleteOffsetRequest 

func NewMockDeleteOffsetRequest(t TestReporter) *MockDeleteOffsetResponse

func (*MockDeleteOffsetResponse) For 

func (m *MockDeleteOffsetResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockDeleteOffsetResponse) SetDeletedOffset 

func (m *MockDeleteOffsetResponse) SetDeletedOffset(errorCode KError, topic string, partition int32, errorPartition KError) *MockDeleteOffsetResponse

type MockDeleteRecordsResponse 

type MockDeleteRecordsResponse struct {
	// contains filtered or unexported fields
}

func NewMockDeleteRecordsResponse 

func NewMockDeleteRecordsResponse(t TestReporter) *MockDeleteRecordsResponse

func (*MockDeleteRecordsResponse) For 

func (mr *MockDeleteRecordsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockDeleteTopicsResponse 

type MockDeleteTopicsResponse struct {
	// contains filtered or unexported fields
}

func NewMockDeleteTopicsResponse 

func NewMockDeleteTopicsResponse(t TestReporter) *MockDeleteTopicsResponse

func (*MockDeleteTopicsResponse) For 

func (mr *MockDeleteTopicsResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockDeleteTopicsResponse) SetError 

func (mr *MockDeleteTopicsResponse) SetError(kerror KError) *MockDeleteTopicsResponse

type MockDescribeConfigsResponse 

type MockDescribeConfigsResponse struct {
	// contains filtered or unexported fields
}

func NewMockDescribeConfigsResponse 

func NewMockDescribeConfigsResponse(t TestReporter) *MockDescribeConfigsResponse

func (*MockDescribeConfigsResponse) For 

func (mr *MockDescribeConfigsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockDescribeConfigsResponseWithErrorCode 

type MockDescribeConfigsResponseWithErrorCode struct {
	// contains filtered or unexported fields
}

func NewMockDescribeConfigsResponseWithErrorCode 

func NewMockDescribeConfigsResponseWithErrorCode(t TestReporter) *MockDescribeConfigsResponseWithErrorCode

func (*MockDescribeConfigsResponseWithErrorCode) For 

func (mr *MockDescribeConfigsResponseWithErrorCode) For(reqBody versionedDecoder) encoderWithHeader

type MockDescribeGroupsResponse 

type MockDescribeGroupsResponse struct {
	// contains filtered or unexported fields
}

func NewMockDescribeGroupsResponse 

func NewMockDescribeGroupsResponse(t TestReporter) *MockDescribeGroupsResponse

func (*MockDescribeGroupsResponse) AddGroupDescription 

func (m *MockDescribeGroupsResponse) AddGroupDescription(groupID string, description *GroupDescription) *MockDescribeGroupsResponse

func (*MockDescribeGroupsResponse) For 

func (m *MockDescribeGroupsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockDescribeLogDirsResponse 

type MockDescribeLogDirsResponse struct {
	// contains filtered or unexported fields
}

func NewMockDescribeLogDirsResponse 

func NewMockDescribeLogDirsResponse(t TestReporter) *MockDescribeLogDirsResponse

func (*MockDescribeLogDirsResponse) For 

func (m *MockDescribeLogDirsResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockDescribeLogDirsResponse) SetLogDirs 

func (m *MockDescribeLogDirsResponse) SetLogDirs(logDirPath string, topicPartitions map[string]int) *MockDescribeLogDirsResponse

type MockFetchResponse 

type MockFetchResponse struct {
	// contains filtered or unexported fields
}

MockFetchResponse is a `FetchResponse` builder.

func NewMockFetchResponse 

func NewMockFetchResponse(t TestReporter, batchSize int) *MockFetchResponse

func (*MockFetchResponse) For 

func (mfr *MockFetchResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockFetchResponse) SetHighWaterMark 

func (mfr *MockFetchResponse) SetHighWaterMark(topic string, partition int32, offset int64) *MockFetchResponse

func (*MockFetchResponse) SetMessage 

func (mfr *MockFetchResponse) SetMessage(topic string, partition int32, offset int64, msg Encoder) *MockFetchResponse

func (*MockFetchResponse) SetMessageWithKey 

func (mfr *MockFetchResponse) SetMessageWithKey(topic string, partition int32, offset int64, key, msg Encoder) *MockFetchResponse

type MockFindCoordinatorResponse 

type MockFindCoordinatorResponse struct {
	// contains filtered or unexported fields
}

MockFindCoordinatorResponse is a `FindCoordinatorResponse` builder.

func NewMockFindCoordinatorResponse 

func NewMockFindCoordinatorResponse(t TestReporter) *MockFindCoordinatorResponse

func (*MockFindCoordinatorResponse) For 

func (mr *MockFindCoordinatorResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockFindCoordinatorResponse) SetCoordinator 

func (mr *MockFindCoordinatorResponse) SetCoordinator(coordinatorType CoordinatorType, group string, broker *MockBroker) *MockFindCoordinatorResponse

func (*MockFindCoordinatorResponse) SetError 

func (mr *MockFindCoordinatorResponse) SetError(coordinatorType CoordinatorType, group string, kerror KError) *MockFindCoordinatorResponse

type MockHeartbeatResponse 

type MockHeartbeatResponse struct {
	Err KError
	// contains filtered or unexported fields
}

func NewMockHeartbeatResponse 

func NewMockHeartbeatResponse(t TestReporter) *MockHeartbeatResponse

func (*MockHeartbeatResponse) For 

func (m *MockHeartbeatResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockHeartbeatResponse) SetError 

func (m *MockHeartbeatResponse) SetError(kerr KError) *MockHeartbeatResponse

type MockIncrementalAlterConfigsResponse 

type MockIncrementalAlterConfigsResponse struct {
	// contains filtered or unexported fields
}

func NewMockIncrementalAlterConfigsResponse 

func NewMockIncrementalAlterConfigsResponse(t TestReporter) *MockIncrementalAlterConfigsResponse

func (*MockIncrementalAlterConfigsResponse) For 

func (mr *MockIncrementalAlterConfigsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockIncrementalAlterConfigsResponseWithErrorCode 

type MockIncrementalAlterConfigsResponseWithErrorCode struct {
	// contains filtered or unexported fields
}

func NewMockIncrementalAlterConfigsResponseWithErrorCode 

func NewMockIncrementalAlterConfigsResponseWithErrorCode(t TestReporter) *MockIncrementalAlterConfigsResponseWithErrorCode

func (*MockIncrementalAlterConfigsResponseWithErrorCode) For 

func (mr *MockIncrementalAlterConfigsResponseWithErrorCode) For(reqBody versionedDecoder) encoderWithHeader

type MockInitProducerIDResponse 

type MockInitProducerIDResponse struct {
	// contains filtered or unexported fields
}

MockInitProducerIDResponse is an `InitPorducerIDResponse` builder.

func NewMockInitProducerIDResponse 

func NewMockInitProducerIDResponse(t TestReporter) *MockInitProducerIDResponse

func (*MockInitProducerIDResponse) For 

func (m *MockInitProducerIDResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockInitProducerIDResponse) SetError 

func (m *MockInitProducerIDResponse) SetError(err KError) *MockInitProducerIDResponse

func (*MockInitProducerIDResponse) SetProducerEpoch 

func (m *MockInitProducerIDResponse) SetProducerEpoch(epoch int) *MockInitProducerIDResponse

func (*MockInitProducerIDResponse) SetProducerID 

func (m *MockInitProducerIDResponse) SetProducerID(id int) *MockInitProducerIDResponse

type MockJoinGroupResponse 

type MockJoinGroupResponse struct {
	ThrottleTime  int32
	Err           KError
	GenerationId  int32
	GroupProtocol string
	LeaderId      string
	MemberId      string
	Members       []GroupMember
	// contains filtered or unexported fields
}

func NewMockJoinGroupResponse 

func NewMockJoinGroupResponse(t TestReporter) *MockJoinGroupResponse

func (*MockJoinGroupResponse) For 

func (m *MockJoinGroupResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockJoinGroupResponse) SetError 

func (m *MockJoinGroupResponse) SetError(kerr KError) *MockJoinGroupResponse

func (*MockJoinGroupResponse) SetGenerationId 

func (m *MockJoinGroupResponse) SetGenerationId(id int32) *MockJoinGroupResponse

func (*MockJoinGroupResponse) SetGroupProtocol 

func (m *MockJoinGroupResponse) SetGroupProtocol(proto string) *MockJoinGroupResponse

func (*MockJoinGroupResponse) SetLeaderId 

func (m *MockJoinGroupResponse) SetLeaderId(id string) *MockJoinGroupResponse

func (*MockJoinGroupResponse) SetMember 

func (m *MockJoinGroupResponse) SetMember(id string, meta *ConsumerGroupMemberMetadata) *MockJoinGroupResponse

func (*MockJoinGroupResponse) SetMemberId 

func (m *MockJoinGroupResponse) SetMemberId(id string) *MockJoinGroupResponse

func (*MockJoinGroupResponse) SetThrottleTime 

func (m *MockJoinGroupResponse) SetThrottleTime(t int32) *MockJoinGroupResponse

type MockKerberosClient 

type MockKerberosClient struct {
	ASRep messages.ASRep
	// contains filtered or unexported fields
}

func (*MockKerberosClient) CName 

func (c *MockKerberosClient) CName() types.PrincipalName

func (*MockKerberosClient) Destroy 

func (c *MockKerberosClient) Destroy()

func (*MockKerberosClient) Domain 

func (c *MockKerberosClient) Domain() string

func (*MockKerberosClient) GetServiceTicket 

func (c *MockKerberosClient) GetServiceTicket(spn string) (messages.Ticket, types.EncryptionKey, error)

func (*MockKerberosClient) Login 

func (c *MockKerberosClient) Login() error

type MockLeaveGroupResponse 

type MockLeaveGroupResponse struct {
	Err KError
	// contains filtered or unexported fields
}

func NewMockLeaveGroupResponse 

func NewMockLeaveGroupResponse(t TestReporter) *MockLeaveGroupResponse

func (*MockLeaveGroupResponse) For 

func (m *MockLeaveGroupResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockLeaveGroupResponse) SetError 

func (m *MockLeaveGroupResponse) SetError(kerr KError) *MockLeaveGroupResponse

type MockListAclsResponse 

type MockListAclsResponse struct {
	// contains filtered or unexported fields
}

func NewMockListAclsResponse 

func NewMockListAclsResponse(t TestReporter) *MockListAclsResponse

func (*MockListAclsResponse) For 

func (mr *MockListAclsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockListGroupsResponse 

type MockListGroupsResponse struct {
	// contains filtered or unexported fields
}

func NewMockListGroupsResponse 

func NewMockListGroupsResponse(t TestReporter) *MockListGroupsResponse

func (*MockListGroupsResponse) AddGroup 

func (m *MockListGroupsResponse) AddGroup(groupID, protocolType string) *MockListGroupsResponse

func (*MockListGroupsResponse) For 

func (m *MockListGroupsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockListPartitionReassignmentsResponse 

type MockListPartitionReassignmentsResponse struct {
	// contains filtered or unexported fields
}

func NewMockListPartitionReassignmentsResponse 

func NewMockListPartitionReassignmentsResponse(t TestReporter) *MockListPartitionReassignmentsResponse

func (*MockListPartitionReassignmentsResponse) For 

func (mr *MockListPartitionReassignmentsResponse) For(reqBody versionedDecoder) encoderWithHeader

type MockMetadataResponse 

type MockMetadataResponse struct {
	// contains filtered or unexported fields
}

MockMetadataResponse is a `MetadataResponse` builder.

func NewMockMetadataResponse 

func NewMockMetadataResponse(t TestReporter) *MockMetadataResponse

func (*MockMetadataResponse) For 

func (mmr *MockMetadataResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockMetadataResponse) SetBroker 

func (mmr *MockMetadataResponse) SetBroker(addr string, brokerID int32) *MockMetadataResponse

func (*MockMetadataResponse) SetController 

func (mmr *MockMetadataResponse) SetController(brokerID int32) *MockMetadataResponse

func (*MockMetadataResponse) SetError 

func (mmr *MockMetadataResponse) SetError(topic string, kerror KError) *MockMetadataResponse

func (*MockMetadataResponse) SetLeader 

func (mmr *MockMetadataResponse) SetLeader(topic string, partition, brokerID int32) *MockMetadataResponse

type MockOffsetCommitResponse 

type MockOffsetCommitResponse struct {
	// contains filtered or unexported fields
}

MockOffsetCommitResponse is a `OffsetCommitResponse` builder.

func NewMockOffsetCommitResponse 

func NewMockOffsetCommitResponse(t TestReporter) *MockOffsetCommitResponse

func (*MockOffsetCommitResponse) For 

func (mr *MockOffsetCommitResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockOffsetCommitResponse) SetError 

func (mr *MockOffsetCommitResponse) SetError(group, topic string, partition int32, kerror KError) *MockOffsetCommitResponse

type MockOffsetFetchResponse 

type MockOffsetFetchResponse struct {
	// contains filtered or unexported fields
}

MockOffsetFetchResponse is a `OffsetFetchResponse` builder.

func NewMockOffsetFetchResponse 

func NewMockOffsetFetchResponse(t TestReporter) *MockOffsetFetchResponse

func (*MockOffsetFetchResponse) For 

func (mr *MockOffsetFetchResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockOffsetFetchResponse) SetError 

func (mr *MockOffsetFetchResponse) SetError(kerror KError) *MockOffsetFetchResponse

func (*MockOffsetFetchResponse) SetOffset 

func (mr *MockOffsetFetchResponse) SetOffset(group, topic string, partition int32, offset int64, metadata string, kerror KError) *MockOffsetFetchResponse

type MockOffsetResponse 

type MockOffsetResponse struct {
	// contains filtered or unexported fields
}

MockOffsetResponse is an `OffsetResponse` builder.

func NewMockOffsetResponse 

func NewMockOffsetResponse(t TestReporter) *MockOffsetResponse

func (*MockOffsetResponse) For 

func (mor *MockOffsetResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockOffsetResponse) SetOffset 

func (mor *MockOffsetResponse) SetOffset(topic string, partition int32, time, offset int64) *MockOffsetResponse

type MockProduceResponse 

type MockProduceResponse struct {
	// contains filtered or unexported fields
}

MockProduceResponse is a `ProduceResponse` builder.

func NewMockProduceResponse 

func NewMockProduceResponse(t TestReporter) *MockProduceResponse

func (*MockProduceResponse) For 

func (mr *MockProduceResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockProduceResponse) SetError 

func (mr *MockProduceResponse) SetError(topic string, partition int32, kerror KError) *MockProduceResponse

func (*MockProduceResponse) SetVersion 

func (mr *MockProduceResponse) SetVersion(version int16) *MockProduceResponse

type MockResponse 

type MockResponse interface {
	For(reqBody versionedDecoder) (res encoderWithHeader)
}

MockResponse is a response builder interface it defines one method that allows generating a response based on a request body. MockResponses are used to program behavior of MockBroker in tests.

type MockSaslAuthenticateResponse 

type MockSaslAuthenticateResponse struct {
	// contains filtered or unexported fields
}

func NewMockSaslAuthenticateResponse 

func NewMockSaslAuthenticateResponse(t TestReporter) *MockSaslAuthenticateResponse

func (*MockSaslAuthenticateResponse) For 

func (msar *MockSaslAuthenticateResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockSaslAuthenticateResponse) SetAuthBytes 

func (msar *MockSaslAuthenticateResponse) SetAuthBytes(saslAuthBytes []byte) *MockSaslAuthenticateResponse

func (*MockSaslAuthenticateResponse) SetError 

func (msar *MockSaslAuthenticateResponse) SetError(kerror KError) *MockSaslAuthenticateResponse

func (*MockSaslAuthenticateResponse) SetSessionLifetimeMs 

func (msar *MockSaslAuthenticateResponse) SetSessionLifetimeMs(sessionLifetimeMs int64) *MockSaslAuthenticateResponse

type MockSaslHandshakeResponse 

type MockSaslHandshakeResponse struct {
	// contains filtered or unexported fields
}

func NewMockSaslHandshakeResponse 

func NewMockSaslHandshakeResponse(t TestReporter) *MockSaslHandshakeResponse

func (*MockSaslHandshakeResponse) For 

func (mshr *MockSaslHandshakeResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockSaslHandshakeResponse) SetEnabledMechanisms 

func (mshr *MockSaslHandshakeResponse) SetEnabledMechanisms(enabledMechanisms []string) *MockSaslHandshakeResponse

func (*MockSaslHandshakeResponse) SetError 

func (mshr *MockSaslHandshakeResponse) SetError(kerror KError) *MockSaslHandshakeResponse

type MockSequence 

type MockSequence struct {
	// contains filtered or unexported fields
}

MockSequence is a mock response builder that is created from a sequence of concrete responses. Every time when a `MockBroker` calls its `For` method the next response from the sequence is returned. When the end of the sequence is reached the last element from the sequence is returned.

func NewMockSequence 

func NewMockSequence(responses ...interface{}) *MockSequence

func (*MockSequence) For 

func (mc *MockSequence) For(reqBody versionedDecoder) (res encoderWithHeader)

type MockSyncGroupResponse 

type MockSyncGroupResponse struct {
	Err              KError
	MemberAssignment []byte
	// contains filtered or unexported fields
}

func NewMockSyncGroupResponse 

func NewMockSyncGroupResponse(t TestReporter) *MockSyncGroupResponse

func (*MockSyncGroupResponse) For 

func (m *MockSyncGroupResponse) For(reqBody versionedDecoder) encoderWithHeader

func (*MockSyncGroupResponse) SetError 

func (m *MockSyncGroupResponse) SetError(kerr KError) *MockSyncGroupResponse

func (*MockSyncGroupResponse) SetMemberAssignment 

func (m *MockSyncGroupResponse) SetMemberAssignment(assignment *ConsumerGroupMemberAssignment) *MockSyncGroupResponse

type MockWrapper 

type MockWrapper struct {
	// contains filtered or unexported fields
}

MockWrapper is a mock response builder that returns a particular concrete response regardless of the actual request passed to the `For` method.

func NewMockWrapper 

func NewMockWrapper(res encoderWithHeader) *MockWrapper

func (*MockWrapper) For 

func (mw *MockWrapper) For(reqBody versionedDecoder) (res encoderWithHeader)

type OffsetCommitRequest 

type OffsetCommitRequest struct {
	ConsumerGroup           string
	ConsumerGroupGeneration int32   // v1 or later
	ConsumerID              string  // v1 or later
	GroupInstanceId         *string // v7 or later
	RetentionTime           int64   // v2 or later

	// Version can be:
	// - 0 (kafka 0.8.1 and later)
	// - 1 (kafka 0.8.2 and later)
	// - 2 (kafka 0.9.0 and later)
	// - 3 (kafka 0.11.0 and later)
	// - 4 (kafka 2.0.0 and later)
	// - 5&6 (kafka 2.1.0 and later)
	// - 7 (kafka 2.3.0 and later)
	Version int16
	// contains filtered or unexported fields
}

func (*OffsetCommitRequest) AddBlock 

func (r *OffsetCommitRequest) AddBlock(topic string, partitionID int32, offset int64, timestamp int64, metadata string)

func (*OffsetCommitRequest) AddBlockWithLeaderEpoch 

func (r *OffsetCommitRequest) AddBlockWithLeaderEpoch(topic string, partitionID int32, offset int64, leaderEpoch int32, timestamp int64, metadata string)

func (*OffsetCommitRequest) Offset 

func (r *OffsetCommitRequest) Offset(topic string, partitionID int32) (int64, string, error)

type OffsetCommitResponse 

type OffsetCommitResponse struct {
	Version        int16
	ThrottleTimeMs int32
	Errors         map[string]map[int32]KError
}

func (*OffsetCommitResponse) AddError 

func (r *OffsetCommitResponse) AddError(topic string, partition int32, kerror KError)

type OffsetFetchRequest 

type OffsetFetchRequest struct {
	Version       int16
	ConsumerGroup string
	RequireStable bool // requires v7+
	// contains filtered or unexported fields
}

func NewOffsetFetchRequest 

func NewOffsetFetchRequest(
	version KafkaVersion,
	group string,
	partitions map[string][]int32,
) *OffsetFetchRequest

func (*OffsetFetchRequest) AddPartition 

func (r *OffsetFetchRequest) AddPartition(topic string, partitionID int32)

func (*OffsetFetchRequest) ZeroPartitions 

func (r *OffsetFetchRequest) ZeroPartitions()

type OffsetFetchResponse 

type OffsetFetchResponse struct {
	Version        int16
	ThrottleTimeMs int32
	Blocks         map[string]map[int32]*OffsetFetchResponseBlock
	Err            KError
}

func (*OffsetFetchResponse) AddBlock 

func (r *OffsetFetchResponse) AddBlock(topic string, partition int32, block *OffsetFetchResponseBlock)

func (*OffsetFetchResponse) GetBlock 

func (r *OffsetFetchResponse) GetBlock(topic string, partition int32) *OffsetFetchResponseBlock

type OffsetFetchResponseBlock 

type OffsetFetchResponseBlock struct {
	Offset      int64
	LeaderEpoch int32
	Metadata    string
	Err         KError
}

type OffsetManager 

type OffsetManager interface {
	// ManagePartition creates a PartitionOffsetManager on the given topic/partition.
	// It will return an error if this OffsetManager is already managing the given
	// topic/partition.
	ManagePartition(topic string, partition int32) (PartitionOffsetManager, error)

	// Close stops the OffsetManager from managing offsets. It is required to call
	// this function before an OffsetManager object passes out of scope, as it
	// will otherwise leak memory. You must call this after all the
	// PartitionOffsetManagers are closed.
	Close() error

	// Commit commits the offsets. This method can be used if AutoCommit.Enable is
	// set to false.
	Commit()
}

OffsetManager uses Kafka to store and fetch consumed partition offsets.

func NewOffsetManagerFromClient 

func NewOffsetManagerFromClient(group string, client Client) (OffsetManager, error)

NewOffsetManagerFromClient creates a new OffsetManager from the given client. It is still necessary to call Close() on the underlying client when finished with the partition manager.

type OffsetRequest 

type OffsetRequest struct {
	Version        int16
	IsolationLevel IsolationLevel
	// contains filtered or unexported fields
}

func (*OffsetRequest) AddBlock 

func (r *OffsetRequest) AddBlock(topic string, partitionID int32, timestamp int64, maxOffsets int32)

func (*OffsetRequest) ReplicaID 

func (r *OffsetRequest) ReplicaID() int32

func (*OffsetRequest) SetReplicaID 

func (r *OffsetRequest) SetReplicaID(id int32)

type OffsetResponse 

type OffsetResponse struct {
	Version        int16
	ThrottleTimeMs int32
	Blocks         map[string]map[int32]*OffsetResponseBlock
}

func (*OffsetResponse) AddTopicPartition 

func (r *OffsetResponse) AddTopicPartition(topic string, partition int32, offset int64)

func (*OffsetResponse) GetBlock 

func (r *OffsetResponse) GetBlock(topic string, partition int32) *OffsetResponseBlock

type OffsetResponseBlock 

type OffsetResponseBlock struct {
	Err KError
	// Offsets contains the result offsets (for V0/V1 compatibility)
	Offsets []int64 // Version 0
	// Timestamp contains the timestamp associated with the returned offset.
	Timestamp int64 // Version 1
	// Offset contains the returned offset.
	Offset int64 // Version 1
	// LeaderEpoch contains the current leader epoch of the partition.
	LeaderEpoch int32
}

type OwnedPartition 

type OwnedPartition struct {
	Topic      string
	Partitions []int32
}

type PacketDecodingError 

type PacketDecodingError struct {
	Info string
}

PacketDecodingError is returned when there was an error (other than truncated data) decoding the Kafka broker's response. This can be a bad CRC or length field, or any other invalid value.

func (PacketDecodingError) Error 

func (err PacketDecodingError) Error() string

type PacketEncodingError 

type PacketEncodingError struct {
	Info string
}

PacketEncodingError is returned from a failure while encoding a Kafka packet. This can happen, for example, if you try to encode a string over 2^15 characters in length, since Kafka's encoding rules do not permit that.

func (PacketEncodingError) Error 

func (err PacketEncodingError) Error() string

type PartitionConsumer 

type PartitionConsumer interface {
	// AsyncClose initiates a shutdown of the PartitionConsumer. This method will return immediately, after which you
	// should continue to service the 'Messages' and 'Errors' channels until they are empty. It is required to call this
	// function, or Close before a consumer object passes out of scope, as it will otherwise leak memory. You must call
	// this before calling Close on the underlying client.
	AsyncClose()

	// Close stops the PartitionConsumer from fetching messages. It will initiate a shutdown just like AsyncClose, drain
	// the Messages channel, harvest any errors & return them to the caller. Note that if you are continuing to service
	// the Messages channel when this function is called, you will be competing with Close for messages; consider
	// calling AsyncClose, instead. It is required to call this function (or AsyncClose) before a consumer object passes
	// out of scope, as it will otherwise leak memory. You must call this before calling Close on the underlying client.
	Close() error

	// Messages returns the read channel for the messages that are returned by
	// the broker.
	Messages() <-chan *ConsumerMessage

	// Errors returns a read channel of errors that occurred during consuming, if
	// enabled. By default, errors are logged and not returned over this channel.
	// If you want to implement any custom error handling, set your config's
	// Consumer.Return.Errors setting to true, and read from this channel.
	Errors() <-chan *ConsumerError

	// HighWaterMarkOffset returns the high water mark offset of the partition,
	// i.e. the offset that will be used for the next message that will be produced.
	// You can use this to determine how far behind the processing is.
	HighWaterMarkOffset() int64

	// Pause suspends fetching from this partition. Future calls to the broker will not return
	// any records from these partition until it have been resumed using Resume().
	// Note that this method does not affect partition subscription.
	// In particular, it does not cause a group rebalance when automatic assignment is used.
	Pause()

	// Resume resumes this partition which have been paused with Pause().
	// New calls to the broker will return records from these partitions if there are any to be fetched.
	// If the partition was not previously paused, this method is a no-op.
	Resume()

	// IsPaused indicates if this partition consumer is paused or not
	IsPaused() bool
}

PartitionConsumer processes Kafka messages from a given topic and partition. You MUST call one of Close() or AsyncClose() on a PartitionConsumer to avoid leaks; it will not be garbage-collected automatically when it passes out of scope.

The simplest way of using a PartitionConsumer is to loop over its Messages channel using a for/range loop. The PartitionConsumer will only stop itself in one case: when the offset being consumed is reported as out of range by the brokers. In this case you should decide what you want to do (try a different offset, notify a human, etc) and handle it appropriately. For all other error cases, it will just keep retrying. By default, it logs these errors to sarama.Logger; if you want to be notified directly of all errors, set your config's Consumer.Return.Errors to true and read from the Errors channel, using a select statement or a separate goroutine. Check out the Consumer examples to see implementations of these different approaches.

To terminate such a for/range loop while the loop is executing, call AsyncClose. This will kick off the process of consumer tear-down & return immediately. Continue to loop, servicing the Messages channel until the teardown process AsyncClose initiated closes it (thus terminating the for/range loop). If you've already ceased reading Messages, call Close; this will signal the PartitionConsumer's goroutines to begin shutting down (just like AsyncClose), but will also drain the Messages channel, harvest all errors & return them once cleanup has completed.

type PartitionError 

type PartitionError struct {
	Partition int32
	Err       KError
}

PartitionError is a partition error type

type PartitionMetadata 

type PartitionMetadata struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// Err contains the partition error, or 0 if there was no error.
	Err KError
	// ID contains the partition index.
	ID int32
	// Leader contains the ID of the leader broker.
	Leader int32
	// LeaderEpoch contains the leader epoch of this partition.
	LeaderEpoch int32
	// Replicas contains the set of all nodes that host this partition.
	Replicas []int32
	// Isr contains the set of nodes that are in sync with the leader for this partition.
	Isr []int32
	// OfflineReplicas contains the set of offline replicas of this partition.
	OfflineReplicas []int32
}

PartitionMetadata contains each partition in the topic.

type PartitionOffsetManager 

type PartitionOffsetManager interface {
	// NextOffset returns the next offset that should be consumed for the managed
	// partition, accompanied by metadata which can be used to reconstruct the state
	// of the partition consumer when it resumes. NextOffset() will return
	// `config.Consumer.Offsets.Initial` and an empty metadata string if no offset
	// was committed for this partition yet.
	NextOffset() (int64, string)

	// MarkOffset marks the provided offset, alongside a metadata string
	// that represents the state of the partition consumer at that point in time. The
	// metadata string can be used by another consumer to restore that state, so it
	// can resume consumption.
	//
	// To follow upstream conventions, you are expected to mark the offset of the
	// next message to read, not the last message read. Thus, when calling `MarkOffset`
	// you should typically add one to the offset of the last consumed message.
	//
	// Note: calling MarkOffset does not necessarily commit the offset to the backend
	// store immediately for efficiency reasons, and it may never be committed if
	// your application crashes. This means that you may end up processing the same
	// message twice, and your processing should ideally be idempotent.
	MarkOffset(offset int64, metadata string)

	// ResetOffset resets to the provided offset, alongside a metadata string that
	// represents the state of the partition consumer at that point in time. Reset
	// acts as a counterpart to MarkOffset, the difference being that it allows to
	// reset an offset to an earlier or smaller value, where MarkOffset only
	// allows incrementing the offset. cf MarkOffset for more details.
	ResetOffset(offset int64, metadata string)

	// Errors returns a read channel of errors that occur during offset management, if
	// enabled. By default, errors are logged and not returned over this channel. If
	// you want to implement any custom error handling, set your config's
	// Consumer.Return.Errors setting to true, and read from this channel.
	Errors() <-chan *ConsumerError

	// AsyncClose initiates a shutdown of the PartitionOffsetManager. This method will
	// return immediately, after which you should wait until the 'errors' channel has
	// been drained and closed. It is required to call this function, or Close before
	// a consumer object passes out of scope, as it will otherwise leak memory. You
	// must call this before calling Close on the underlying client.
	AsyncClose()

	// Close stops the PartitionOffsetManager from managing offsets. It is required to
	// call this function (or AsyncClose) before a PartitionOffsetManager object
	// passes out of scope, as it will otherwise leak memory. You must call this
	// before calling Close on the underlying client.
	Close() error
}

PartitionOffsetManager uses Kafka to store and fetch consumed partition offsets. You MUST call Close() on a partition offset manager to avoid leaks, it will not be garbage-collected automatically when it passes out of scope.

type PartitionOffsetMetadata 

type PartitionOffsetMetadata struct {
	// Partition contains the index of the partition within the topic.
	Partition int32
	// Offset contains the message offset to be committed.
	Offset int64
	// LeaderEpoch contains the leader epoch of the last consumed record.
	LeaderEpoch int32
	// Metadata contains any associated metadata the client wants to keep.
	Metadata *string
}

type PartitionReplicaReassignmentsStatus 

type PartitionReplicaReassignmentsStatus struct {
	Replicas         []int32
	AddingReplicas   []int32
	RemovingReplicas []int32
}

type Partitioner 

type Partitioner interface {
	// Partition takes a message and partition count and chooses a partition
	Partition(message *ProducerMessage, numPartitions int32) (int32, error)

	// RequiresConsistency indicates to the user of the partitioner whether the
	// mapping of key->partition is consistent or not. Specifically, if a
	// partitioner requires consistency then it must be allowed to choose from all
	// partitions (even ones known to be unavailable), and its choice must be
	// respected by the caller. The obvious example is the HashPartitioner.
	RequiresConsistency() bool
}

Partitioner is anything that, given a Kafka message and a number of partitions indexed [0...numPartitions-1], decides to which partition to send the message. RandomPartitioner, RoundRobinPartitioner and HashPartitioner are provided as simple default implementations.

Example (Manual)

This example shows how to assign partitions to your messages manually. 

config := NewTestConfig()

// First, we tell the producer that we are going to partition ourselves.
config.Producer.Partitioner = NewManualPartitioner

producer, err := NewSyncProducer([]string{"localhost:9092"}, config)
if err != nil {
	log.Println(err)
	return
}
defer func() {
	if err := producer.Close(); err != nil {
		log.Println("Failed to close producer:", err)
	}
}()

// Now, we set the Partition field of the ProducerMessage struct.
msg := &ProducerMessage{Topic: "test", Partition: 6, Value: StringEncoder("test")}

partition, offset, err := producer.SendMessage(msg)
if err != nil {
	log.Println("Failed to produce message to kafka cluster.")
	return
}

if partition != 6 {
	log.Println("Message should have been produced to partition 6!")
	return
}

log.Printf("Produced message to partition %d with offset %d", partition, offset)

Output:
Example (Per_topic)

This example shows how to set a different partitioner depending on the topic. 

config := NewTestConfig()
config.Producer.Partitioner = func(topic string) Partitioner {
	switch topic {
	case "access_log", "error_log":
		return NewRandomPartitioner(topic)

	default:
		return NewHashPartitioner(topic)
	}
}

// ...

Output:
Example (Random)

By default, Sarama uses the message's key to consistently assign a partition to a message using hashing. If no key is set, a random partition will be chosen. This example shows how you can partition messages randomly, even when a key is set, by overriding Config.Producer.Partitioner. 

config := NewTestConfig()
config.Producer.Partitioner = NewRandomPartitioner

producer, err := NewSyncProducer([]string{"localhost:9092"}, config)
if err != nil {
	log.Println(err)
	return
}
defer func() {
	if err := producer.Close(); err != nil {
		log.Println("Failed to close producer:", err)
	}
}()

msg := &ProducerMessage{Topic: "test", Key: StringEncoder("key is set"), Value: StringEncoder("test")}
partition, offset, err := producer.SendMessage(msg)
if err != nil {
	log.Println("Failed to produce message to kafka cluster.")
	return
}

log.Printf("Produced message to partition %d with offset %d", partition, offset)

Output:

func NewConsistentCRCHashPartitioner 

func NewConsistentCRCHashPartitioner(topic string) Partitioner

NewConsistentCRCHashPartitioner is like NewHashPartitioner execpt that it uses the *unsigned* crc32 hash of the encoded bytes of the message key modulus the number of partitions. This is compatible with librdkafka's `consistent_random` partitioner

func NewHashPartitioner 

func NewHashPartitioner(topic string) Partitioner

NewHashPartitioner returns a Partitioner which behaves as follows. If the message's key is nil then a random partition is chosen. Otherwise the FNV-1a hash of the encoded bytes of the message key is used, modulus the number of partitions. This ensures that messages with the same key always end up on the same partition.

func NewManualPartitioner 

func NewManualPartitioner(topic string) Partitioner

NewManualPartitioner returns a Partitioner which uses the partition manually set in the provided ProducerMessage's Partition field as the partition to produce to.

func NewRandomPartitioner 

func NewRandomPartitioner(topic string) Partitioner

NewRandomPartitioner returns a Partitioner which chooses a random partition each time.

func NewReferenceHashPartitioner 

func NewReferenceHashPartitioner(topic string) Partitioner

NewReferenceHashPartitioner is like NewHashPartitioner except that it handles absolute values in the same way as the reference Java implementation. NewHashPartitioner was supposed to do that but it had a mistake and now there are people depending on both behaviors. This will all go away on the next major version bump.

func NewRoundRobinPartitioner 

func NewRoundRobinPartitioner(topic string) Partitioner

NewRoundRobinPartitioner returns a Partitioner which walks through the available partitions one at a time.

type PartitionerConstructor 

type PartitionerConstructor func(topic string) Partitioner

PartitionerConstructor is the type for a function capable of constructing new Partitioners.

func NewCustomHashPartitioner 

func NewCustomHashPartitioner(hasher func() hash.Hash32) PartitionerConstructor

NewCustomHashPartitioner is a wrapper around NewHashPartitioner, allowing the use of custom hasher. The argument is a function providing the instance, implementing the hash.Hash32 interface. This is to ensure that each partition dispatcher gets its own hasher, to avoid concurrency issues by sharing an instance.

func NewCustomPartitioner 

func NewCustomPartitioner(options ...HashPartitionerOption) PartitionerConstructor

NewCustomPartitioner creates a default Partitioner but lets you specify the behavior of each component via options

type ProduceCallback 

type ProduceCallback func(*ProduceResponse, error)

ProduceCallback function is called once the produce response has been parsed or could not be read.

type ProduceRequest 

type ProduceRequest struct {
	TransactionalID *string
	RequiredAcks    RequiredAcks
	Timeout         int32
	Version         int16 // v1 requires Kafka 0.9, v2 requires Kafka 0.10, v3 requires Kafka 0.11
	// contains filtered or unexported fields
}

func (*ProduceRequest) AddBatch 

func (r *ProduceRequest) AddBatch(topic string, partition int32, batch *RecordBatch)

func (*ProduceRequest) AddMessage 

func (r *ProduceRequest) AddMessage(topic string, partition int32, msg *Message)

func (*ProduceRequest) AddSet 

func (r *ProduceRequest) AddSet(topic string, partition int32, set *MessageSet)

type ProduceResponse 

type ProduceResponse struct {
	Blocks       map[string]map[int32]*ProduceResponseBlock // v0, responses
	Version      int16
	ThrottleTime time.Duration // v1, throttle_time_ms
}

func (*ProduceResponse) AddTopicPartition 

func (r *ProduceResponse) AddTopicPartition(topic string, partition int32, err KError)

func (*ProduceResponse) GetBlock 

func (r *ProduceResponse) GetBlock(topic string, partition int32) *ProduceResponseBlock

type ProduceResponseBlock 

type ProduceResponseBlock struct {
	Err         KError    // v0, error_code
	Offset      int64     // v0, base_offset
	Timestamp   time.Time // v2, log_append_time, and the broker is configured with `LogAppendTime`
	StartOffset int64     // v5, log_start_offset
}

partition_responses in protocol

type ProducerError 

type ProducerError struct {
	Msg *ProducerMessage
	Err error
}

ProducerError is the type of error generated when the producer fails to deliver a message. It contains the original ProducerMessage as well as the actual error value.

func (ProducerError) Error 

func (pe ProducerError) Error() string

func (ProducerError) Unwrap 

func (pe ProducerError) Unwrap() error

type ProducerErrors 

type ProducerErrors []*ProducerError

ProducerErrors is a type that wraps a batch of "ProducerError"s and implements the Error interface. It can be returned from the Producer's Close method to avoid the need to manually drain the Errors channel when closing a producer.

func (ProducerErrors) Error 

func (pe ProducerErrors) Error() string

type ProducerInterceptor 

type ProducerInterceptor interface {

	// OnSend is called when the producer message is intercepted. Please avoid
	// modifying the message until it's safe to do so, as this is _not_ a copy
	// of the message.
	OnSend(*ProducerMessage)
}

ProducerInterceptor allows you to intercept (and possibly mutate) the records received by the producer before they are published to the Kafka cluster. https://cwiki.apache.org/confluence/display/KAFKA/KIP-42%3A+Add+Producer+and+Consumer+Interceptors#KIP42:AddProducerandConsumerInterceptors-Motivation

type ProducerMessage 

type ProducerMessage struct {
	Topic string // The Kafka topic for this message.
	// The partitioning key for this message. Pre-existing Encoders include
	// StringEncoder and ByteEncoder.
	Key Encoder
	// The actual message to store in Kafka. Pre-existing Encoders include
	// StringEncoder and ByteEncoder.
	Value Encoder

	// The headers are key-value pairs that are transparently passed
	// by Kafka between producers and consumers.
	Headers []RecordHeader

	// This field is used to hold arbitrary data you wish to include so it
	// will be available when receiving on the Successes and Errors channels.
	// Sarama completely ignores this field and is only to be used for
	// pass-through data.
	Metadata interface{}

	// Offset is the offset of the message stored on the broker. This is only
	// guaranteed to be defined if the message was successfully delivered and
	// RequiredAcks is not NoResponse.
	Offset int64
	// Partition is the partition that the message was sent to. This is only
	// guaranteed to be defined if the message was successfully delivered.
	Partition int32
	// Timestamp can vary in behavior depending on broker configuration, being
	// in either one of the CreateTime or LogAppendTime modes (default CreateTime),
	// and requiring version at least 0.10.0.
	//
	// When configured to CreateTime, the timestamp is specified by the producer
	// either by explicitly setting this field, or when the message is added
	// to a produce set.
	//
	// When configured to LogAppendTime, the timestamp assigned to the message
	// by the broker. This is only guaranteed to be defined if the message was
	// successfully delivered and RequiredAcks is not NoResponse.
	Timestamp time.Time
	// contains filtered or unexported fields
}

ProducerMessage is the collection of elements passed to the Producer in order to send a message.

func (*ProducerMessage) ByteSize 

func (m *ProducerMessage) ByteSize(version int) int

type ProducerTxnStatusFlag 

type ProducerTxnStatusFlag int16

ProducerTxnStatusFlag mark current transaction status. 

const (
	// ProducerTxnFlagUninitialized when txnmgr is created
	ProducerTxnFlagUninitialized ProducerTxnStatusFlag = 1 << iota
	// ProducerTxnFlagInitializing when txnmgr is initializing
	ProducerTxnFlagInitializing
	// ProducerTxnFlagReady when is ready to receive transaction
	ProducerTxnFlagReady
	// ProducerTxnFlagInTransaction when transaction is started
	ProducerTxnFlagInTransaction
	// ProducerTxnFlagEndTransaction when transaction will be committed
	ProducerTxnFlagEndTransaction
	// ProducerTxnFlagInError when having abortable or fatal error
	ProducerTxnFlagInError
	// ProducerTxnFlagCommittingTransaction when committing txn
	ProducerTxnFlagCommittingTransaction
	// ProducerTxnFlagAbortingTransaction when committing txn
	ProducerTxnFlagAbortingTransaction
	// ProducerTxnFlagAbortableError when producer encounter an abortable error
	// Must call AbortTxn in this case.
	ProducerTxnFlagAbortableError
	// ProducerTxnFlagFatalError when producer encounter an fatal error
	// Must Close an recreate it.
	ProducerTxnFlagFatalError
)

func (ProducerTxnStatusFlag) String 

func (s ProducerTxnStatusFlag) String() string

type QuotaEntityComponent 

type QuotaEntityComponent struct {
	EntityType QuotaEntityType
	MatchType  QuotaMatchType
	Name       string
}

type QuotaEntityType 

type QuotaEntityType string
const (
	QuotaEntityUser     QuotaEntityType = "user"
	QuotaEntityClientID QuotaEntityType = "client-id"
	QuotaEntityIP       QuotaEntityType = "ip"
)

ref: https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/quota/ClientQuotaEntity.java

type QuotaFilterComponent 

type QuotaFilterComponent struct {
	EntityType QuotaEntityType
	MatchType  QuotaMatchType
	Match      string
}

Describe a component for applying a client quota filter. EntityType: the entity type the filter component applies to ("user", "client-id", "ip") MatchType: the match type of the filter component (any, exact, default) Match: the name that's matched exactly (used when MatchType is QuotaMatchExact)

type QuotaMatchType 

type QuotaMatchType int
const (
	QuotaMatchExact QuotaMatchType = iota
	QuotaMatchDefault
	QuotaMatchAny
)

ref: https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/requests/DescribeClientQuotasRequest.java

type Record 

type Record struct {
	Headers []*RecordHeader

	Attributes     int8
	TimestampDelta time.Duration
	OffsetDelta    int64
	Key            []byte
	Value          []byte
	// contains filtered or unexported fields
}

Record is kafka record type

type RecordBatch 

type RecordBatch struct {
	FirstOffset           int64
	PartitionLeaderEpoch  int32
	Version               int8
	Codec                 CompressionCodec
	CompressionLevel      int
	Control               bool
	LogAppendTime         bool
	LastOffsetDelta       int32
	FirstTimestamp        time.Time
	MaxTimestamp          time.Time
	ProducerID            int64
	ProducerEpoch         int16
	FirstSequence         int32
	Records               []*Record
	PartialTrailingRecord bool
	IsTransactional       bool
	// contains filtered or unexported fields
}

func (*RecordBatch) LastOffset 

func (b *RecordBatch) LastOffset() int64

type RecordHeader 

type RecordHeader struct {
	Key   []byte
	Value []byte
}

RecordHeader stores key and value for a record header

type Records 

type Records struct {
	MsgSet      *MessageSet
	RecordBatch *RecordBatch
	// contains filtered or unexported fields
}

Records implements a union type containing either a RecordBatch or a legacy MessageSet.

type RequestNotifierFunc 

type RequestNotifierFunc func(bytesRead, bytesWritten int)

RequestNotifierFunc is invoked when a mock broker processes a request successfully and will provides the number of bytes read and written.

type RequestResponse 

type RequestResponse struct {
	Request  protocolBody
	Response encoder
}

RequestResponse represents a Request/Response pair processed by MockBroker.

type RequiredAcks 

type RequiredAcks int16

RequiredAcks is used in Produce Requests to tell the broker how many replica acknowledgements it must see before responding. Any of the constants defined here are valid. On broker versions prior to 0.8.2.0 any other positive int16 is also valid (the broker will wait for that many acknowledgements) but in 0.8.2.0 and later this will raise an exception (it has been replaced by setting the `min.isr` value in the brokers configuration). 

const (
	// NoResponse doesn't send any response, the TCP ACK is all you get.
	NoResponse RequiredAcks = 0
	// WaitForLocal waits for only the local commit to succeed before responding.
	WaitForLocal RequiredAcks = 1
	// WaitForAll waits for all in-sync replicas to commit before responding.
	// The minimum number of in-sync replicas is configured on the broker via
	// the `min.insync.replicas` configuration key.
	WaitForAll RequiredAcks = -1
)

type Resource 

type Resource struct {
	ResourceType        AclResourceType
	ResourceName        string
	ResourcePatternType AclResourcePatternType
}

Resource holds information about acl resource type

type ResourceAcls 

type ResourceAcls struct {
	Resource
	Acls []*Acl
}

ResourceAcls is an acl resource type

type ResourceResponse 

type ResourceResponse struct {
	ErrorCode int16
	ErrorMsg  string
	Type      ConfigResourceType
	Name      string
	Configs   []*ConfigEntry
}

type SASLMechanism 

type SASLMechanism string

SASLMechanism specifies the SASL mechanism the client uses to authenticate with the broker

type SCRAMClient 

type SCRAMClient interface {
	// Begin prepares the client for the SCRAM exchange
	// with the server with a user name and a password
	Begin(userName, password, authzID string) error
	// Step steps client through the SCRAM exchange. It is
	// called repeatedly until it errors or `Done` returns true.
	Step(challenge string) (response string, err error)
	// Done should return true when the SCRAM conversation
	// is over.
	Done() bool
}

SCRAMClient is a an interface to a SCRAM client implementation.

type SaslAuthenticateRequest 

type SaslAuthenticateRequest struct {
	// Version defines the protocol version to use for encode and decode
	Version       int16
	SaslAuthBytes []byte
}

type SaslAuthenticateResponse 

type SaslAuthenticateResponse struct {
	// Version defines the protocol version to use for encode and decode
	Version           int16
	Err               KError
	ErrorMessage      *string
	SaslAuthBytes     []byte
	SessionLifetimeMs int64
}

type SaslHandshakeRequest 

type SaslHandshakeRequest struct {
	Mechanism string
	Version   int16
}

type SaslHandshakeResponse 

type SaslHandshakeResponse struct {
	Version           int16
	Err               KError
	EnabledMechanisms []string
}

type ScramMechanismType 

type ScramMechanismType int8
const (
	SCRAM_MECHANISM_UNKNOWN ScramMechanismType = iota // 0
	SCRAM_MECHANISM_SHA_256                           // 1
	SCRAM_MECHANISM_SHA_512                           // 2
)

func (ScramMechanismType) String 

func (s ScramMechanismType) String() string

type StdLogger 

type StdLogger interface {
	Print(v ...interface{})
	Printf(format string, v ...interface{})
	Println(v ...interface{})
}

StdLogger is used to log error messages. 

var DebugLogger StdLogger = &debugLogger{}

DebugLogger is the instance of a StdLogger that Sarama writes more verbose debug information to. By default it is set to redirect all debug to the default Logger above, but you can optionally set it to another StdLogger instance to (e.g.,) discard debug information

type StickyAssignorUserData 

type StickyAssignorUserData interface {
	// contains filtered or unexported methods
}

type StickyAssignorUserDataV0 

type StickyAssignorUserDataV0 struct {
	Topics map[string][]int32
	// contains filtered or unexported fields
}

StickyAssignorUserDataV0 holds topic partition information for an assignment

type StickyAssignorUserDataV1 

type StickyAssignorUserDataV1 struct {
	Topics     map[string][]int32
	Generation int32
	// contains filtered or unexported fields
}

StickyAssignorUserDataV1 holds topic partition information for an assignment

type StringEncoder 

type StringEncoder string

StringEncoder implements the Encoder interface for Go strings so that they can be used as the Key or Value in a ProducerMessage.

func (StringEncoder) Encode 

func (s StringEncoder) Encode() ([]byte, error)

func (StringEncoder) Length 

func (s StringEncoder) Length() int

type SyncGroupRequest 

type SyncGroupRequest struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// GroupId contains the unique group identifier.
	GroupId string
	// GenerationId contains the generation of the group.
	GenerationId int32
	// MemberId contains the member ID assigned by the group.
	MemberId string
	// GroupInstanceId contains the unique identifier of the consumer instance provided by end user.
	GroupInstanceId *string
	// GroupAssignments contains each assignment.
	GroupAssignments []SyncGroupRequestAssignment
}

func (*SyncGroupRequest) AddGroupAssignment 

func (r *SyncGroupRequest) AddGroupAssignment(memberId string, memberAssignment []byte)

func (*SyncGroupRequest) AddGroupAssignmentMember 

func (r *SyncGroupRequest) AddGroupAssignmentMember(
	memberId string,
	memberAssignment *ConsumerGroupMemberAssignment,
) error

type SyncGroupRequestAssignment 

type SyncGroupRequestAssignment struct {
	// MemberId contains the ID of the member to assign.
	MemberId string
	// Assignment contains the member assignment.
	Assignment []byte
}

type SyncGroupResponse 

type SyncGroupResponse struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// ThrottleTime contains the duration in milliseconds for which the
	// request was throttled due to a quota violation, or zero if the request
	// did not violate any quota.
	ThrottleTime int32
	// Err contains the error code, or 0 if there was no error.
	Err KError
	// MemberAssignment contains the member assignment.
	MemberAssignment []byte
}

func (*SyncGroupResponse) GetMemberAssignment 

func (r *SyncGroupResponse) GetMemberAssignment() (*ConsumerGroupMemberAssignment, error)

type SyncProducer 

type SyncProducer interface {

	// SendMessage produces a given message, and returns only when it either has
	// succeeded or failed to produce. It will return the partition and the offset
	// of the produced message, or an error if the message failed to produce.
	SendMessage(msg *ProducerMessage) (partition int32, offset int64, err error)

	// SendMessages produces a given set of messages, and returns only when all
	// messages in the set have either succeeded or failed. Note that messages
	// can succeed and fail individually; if some succeed and some fail,
	// SendMessages will return an error.
	SendMessages(msgs []*ProducerMessage) error

	// Close shuts down the producer; you must call this function before a producer
	// object passes out of scope, as it may otherwise leak memory.
	// You must call this before calling Close on the underlying client.
	Close() error

	// TxnStatus return current producer transaction status.
	TxnStatus() ProducerTxnStatusFlag

	// IsTransactional return true when current producer is transactional.
	IsTransactional() bool

	// BeginTxn mark current transaction as ready.
	BeginTxn() error

	// CommitTxn commit current transaction.
	CommitTxn() error

	// AbortTxn abort current transaction.
	AbortTxn() error

	// AddOffsetsToTxn add associated offsets to current transaction.
	AddOffsetsToTxn(offsets map[string][]*PartitionOffsetMetadata, groupId string) error

	// AddMessageToTxn add message offsets to current transaction.
	AddMessageToTxn(msg *ConsumerMessage, groupId string, metadata *string) error
}

SyncProducer publishes Kafka messages, blocking until they have been acknowledged. It routes messages to the correct broker, refreshing metadata as appropriate, and parses responses for errors. You must call Close() on a producer to avoid leaks, it may not be garbage-collected automatically when it passes out of scope.

The SyncProducer comes with two caveats: it will generally be less efficient than the AsyncProducer, and the actual durability guarantee provided when a message is acknowledged depend on the configured value of `Producer.RequiredAcks`. There are configurations where a message acknowledged by the SyncProducer can still sometimes be lost.

For implementation reasons, the SyncProducer requires `Producer.Return.Errors` and `Producer.Return.Successes` to be set to true in its configuration.

Example

This example shows the basic usage pattern of the SyncProducer. 

producer, err := NewSyncProducer([]string{"localhost:9092"}, nil)
if err != nil {
	log.Fatalln(err)
}
defer func() {
	if err := producer.Close(); err != nil {
		log.Fatalln(err)
	}
}()

msg := &ProducerMessage{Topic: "my_topic", Value: StringEncoder("testing 123")}
partition, offset, err := producer.SendMessage(msg)
if err != nil {
	log.Printf("FAILED to send message: %s\n", err)
} else {
	log.Printf("> message sent to partition %d at offset %d\n", partition, offset)
}

Output:

func NewSyncProducer 

func NewSyncProducer(addrs []string, config *Config) (SyncProducer, error)

NewSyncProducer creates a new SyncProducer using the given broker addresses and configuration.

func NewSyncProducerFromClient 

func NewSyncProducerFromClient(client Client) (SyncProducer, error)

NewSyncProducerFromClient creates a new SyncProducer using the given client. It is still necessary to call Close() on the underlying client when shutting down this producer.

type TestReporter 

type TestReporter interface {
	Error(...interface{})
	Errorf(string, ...interface{})
	Fatal(...interface{})
	Fatalf(string, ...interface{})
	Helper()
}

TestReporter has methods matching go's testing.T to avoid importing `testing` in the main part of the library.

type Timestamp 

type Timestamp struct {
	*time.Time
}

type TopicDetail 

type TopicDetail struct {
	// NumPartitions contains the number of partitions to create in the topic, or
	// -1 if we are either specifying a manual partition assignment or using the
	// default partitions.
	NumPartitions int32
	// ReplicationFactor contains the number of replicas to create for each
	// partition in the topic, or -1 if we are either specifying a manual
	// partition assignment or using the default replication factor.
	ReplicationFactor int16
	// ReplicaAssignment contains the manual partition assignment, or the empty
	// array if we are using automatic assignment.
	ReplicaAssignment map[int32][]int32
	// ConfigEntries contains the custom topic configurations to set.
	ConfigEntries map[string]*string
}

type TopicError 

type TopicError struct {
	Err    KError
	ErrMsg *string
}

func (*TopicError) Error 

func (t *TopicError) Error() string

func (*TopicError) Unwrap 

func (t *TopicError) Unwrap() error

type TopicMetadata 

type TopicMetadata struct {
	// Version defines the protocol version to use for encode and decode
	Version int16
	// Err contains the topic error, or 0 if there was no error.
	Err KError
	// Name contains the topic name.
	Name string
	Uuid Uuid
	// IsInternal contains a True if the topic is internal.
	IsInternal bool
	// Partitions contains each partition in the topic.
	Partitions                []*PartitionMetadata
	TopicAuthorizedOperations int32 // Only valid for Version >= 8
}

TopicMetadata contains each topic in the response.

type TopicPartition 

type TopicPartition struct {
	Count      int32
	Assignment [][]int32
}

type TopicPartitionError 

type TopicPartitionError struct {
	Err    KError
	ErrMsg *string
}

func (*TopicPartitionError) Error 

func (t *TopicPartitionError) Error() string

func (*TopicPartitionError) Unwrap 

func (t *TopicPartitionError) Unwrap() error

type TxnOffsetCommitRequest 

type TxnOffsetCommitRequest struct {
	Version         int16
	TransactionalID string
	GroupID         string
	ProducerID      int64
	ProducerEpoch   int16
	Topics          map[string][]*PartitionOffsetMetadata
}

type TxnOffsetCommitResponse 

type TxnOffsetCommitResponse struct {
	Version      int16
	ThrottleTime time.Duration
	Topics       map[string][]*PartitionError
}

type UserScramCredentialsResponseInfo 

type UserScramCredentialsResponseInfo struct {
	Mechanism  ScramMechanismType
	Iterations int32
}

type Uuid 

type Uuid [16]byte

func (Uuid) String 

func (u Uuid) String() string

type ZstdDecoderParams 

type ZstdDecoderParams struct {
}

type ZstdEncoderParams 

type ZstdEncoderParams struct {
	Level int
}

Source Files

View all Source files

Directories

Path Synopsis
examples
exactly_once Module
http_server Module
interceptors Module
sasl_scram_client Module
txn_producer Module
internal
toxiproxy
Package mocks provides mocks that can be used for testing applications that use Sarama.
 Package mocks provides mocks that can be used for testing applications that use Sarama.
tools
kafka-console-consumer
kafka-console-partitionconsumer
kafka-console-producer
kafka-producer-performance
tls

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