consumer

package
v1.0.0 Latest Latest
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 Go to latest Published: Mar 17, 2020 License: Apache-2.0 Imports: 22 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	/**
	 * <ul>
	 * Keywords:
	 * <li>{@code AND, OR, NOT, BETWEEN, IN, TRUE, FALSE, IS, NULL}</li>
	 * </ul>
	 * <p/>
	 * <ul>
	 * Data type:
	 * <li>Boolean, like: TRUE, FALSE</li>
	 * <li>String, like: 'abc'</li>
	 * <li>Decimal, like: 123</li>
	 * <li>Float number, like: 3.1415</li>
	 * </ul>
	 * <p/>
	 * <ul>
	 * Grammar:
	 * <li>{@code AND, OR}</li>
	 * <li>{@code >, >=, <, <=, =}</li>
	 * <li>{@code BETWEEN A AND B}, equals to {@code >=A AND <=B}</li>
	 * <li>{@code NOT BETWEEN A AND B}, equals to {@code >B OR <A}</li>
	 * <li>{@code IN ('a', 'b')}, equals to {@code ='a' OR ='b'}, this operation only support String type.</li>
	 * <li>{@code IS NULL}, {@code IS NOT NULL}, check parameter whether is null, or not.</li>
	 * <li>{@code =TRUE}, {@code =FALSE}, check parameter whether is true, or false.</li>
	 * </ul>
	 * <p/>
	 * <p>
	 * Example:
	 * (a > 10 AND a < 100) OR (b IS NOT NULL AND b=TRUE)
	 * </p>
	 */
	SQL92 = ExpressionType("SQL92")

	/**
	 * Only support or operation such as
	 * "tag1 || tag2 || tag3", <br>
	 * If null or * expression, meaning subscribe all.
	 */
	TAG = ExpressionType("TAG")
)
View Source 
const (
	Mb = 1024 * 1024
)

Variables

View Source 
var (
	ErrCreated        = errors.New("consumer group has been created")
	ErrBrokerNotFound = errors.New("broker can not found")
)

Functions

func AllocateByAveragely 

func AllocateByAveragely(consumerGroup, currentCID string, mqAll []*primitive.MessageQueue,
	cidAll []string) []*primitive.MessageQueue

func AllocateByAveragelyCircle 

func AllocateByAveragelyCircle(consumerGroup, currentCID string, mqAll []*primitive.MessageQueue,
	cidAll []string) []*primitive.MessageQueue

func AllocateByConfig 

func AllocateByConfig(consumerGroup, currentCID string, mqAll []*primitive.MessageQueue,
	cidAll []string) []*primitive.MessageQueue

func AllocateByConsistentHash 

func AllocateByConsistentHash(consumerGroup, currentCID string, mqAll []*primitive.MessageQueue,
	cidAll []string) []*primitive.MessageQueue

func AllocateByMachineNearby 

func AllocateByMachineNearby(consumerGroup, currentCID string, mqAll []*primitive.MessageQueue,
	cidAll []string) []*primitive.MessageQueue

TODO

func AllocateByMachineRoom 

func AllocateByMachineRoom(consumerGroup, currentCID string, mqAll []*primitive.MessageQueue,
	cidAll []string) []*primitive.MessageQueue

func IsTagType 

func IsTagType(exp string) bool

func NewPullConsumer 

func NewPullConsumer(options ...Option) (*defaultPullConsumer, error)

func NewPushConsumer 

func NewPushConsumer(opts ...Option) (*pushConsumer, error)

func ShutDownStatis 

func ShutDownStatis()

Types

type AllocateStrategy 

type AllocateStrategy func(string, string, []*primitive.MessageQueue, []string) []*primitive.MessageQueue

type ConsumeFromWhere 

type ConsumeFromWhere int

Consuming point on consumer booting. </p>

There are three consuming points: <ul> <li> <code>CONSUME_FROM_LAST_OFFSET</code>: consumer clients pick up where it stopped previously. If it were a newly booting up consumer client, according aging of the consumer group, there are two cases: <ol> <li> if the consumer group is created so recently that the earliest message being subscribed has yet expired, which means the consumer group represents a lately launched business, consuming will start from the very beginning; </li> <li> if the earliest message being subscribed has expired, consuming will start from the latest messages, meaning messages born prior to the booting timestamp would be ignored. </li> </ol> </li> <li> <code>CONSUME_FROM_FIRST_OFFSET</code>: Consumer client will start from earliest messages available. </li> <li> <code>CONSUME_FROM_TIMESTAMP</code>: Consumer client will start from specified timestamp, which means messages born prior to {@link #consumeTimestamp} will be ignored </li> </ul> 

const (
	ConsumeFromLastOffset ConsumeFromWhere = iota
	ConsumeFromFirstOffset
	ConsumeFromTimestamp
)

type ConsumeResult 

type ConsumeResult int
const (
	ConsumeSuccess ConsumeResult = iota
	ConsumeRetryLater
	Commit
	Rollback
	SuspendCurrentQueueAMoment
)

type ConsumeResultHolder 

type ConsumeResultHolder struct {
	ConsumeResult
}

type ConsumeStatus 

type ConsumeStatus struct {
	PullRT            float64
	PullTPS           float64
	ConsumeRT         float64
	ConsumeOKTPS      float64
	ConsumeFailedTPS  float64
	ConsumeFailedMsgs int64
}

func GetConsumeStatus 

func GetConsumeStatus(group, topic string) ConsumeStatus

type ConsumeType 

type ConsumeType string

type ConsumerReturn 

type ConsumerReturn int
const (
	SuccessReturn ConsumerReturn = iota
	ExceptionReturn
	NullReturn
	TimeoutReturn
	FailedReturn
)

type ExpressionType 

type ExpressionType string

type MessageModel 

type MessageModel int

Message model defines the way how messages are delivered to each consumer clients. </p>

RocketMQ supports two message models: clustering and broadcasting. If clustering is set, consumer clients with the same {@link #ConsumerGroup} would only consume shards of the messages subscribed, which achieves load balances; Conversely, if the broadcasting is set, each consumer client will consume all subscribed messages separately. </p>

This field defaults to clustering. 

const (
	BroadCasting MessageModel = iota
	Clustering
)

func (MessageModel) String 

func (mode MessageModel) String() string

type MessageSelector 

type MessageSelector struct {
	Type       ExpressionType
	Expression string
}

type OffsetStore 

type OffsetStore interface {
	// contains filtered or unexported methods
}

func NewLocalFileOffsetStore 

func NewLocalFileOffsetStore(clientID, group string) OffsetStore

func NewRemoteOffsetStore 

func NewRemoteOffsetStore(group string, client internal.RMQClient) OffsetStore

type Option 

type Option func(*consumerOptions)

func WithConsumeFromWhere 

func WithConsumeFromWhere(w ConsumeFromWhere) Option

func WithConsumerModel 

func WithConsumerModel(m MessageModel) Option

func WithConsumerOrder 

func WithConsumerOrder(order bool) Option

func WithCredentials 

func WithCredentials(c primitive.Credentials) Option

func WithGroupName 

func WithGroupName(group string) Option

WithGroupName set group name address

func WithInterceptor 

func WithInterceptor(fs ...primitive.Interceptor) Option

WithChainConsumerInterceptor returns a ConsumerOption that specifies the chained interceptor for consumer. The first interceptor will be the outer most, while the last interceptor will be the inner most wrapper around the real call.

func WithMaxReconsumeTimes 

func WithMaxReconsumeTimes(times int32) Option

WithMaxReconsumeTimes set MaxReconsumeTimes of options, if message reconsume greater than MaxReconsumeTimes, it will be sent to retry or dlq topic. more info reference by examples/consumer/retry.

func WithNameServer 

func WithNameServer(nameServers []string) Option

WithNameServer set NameServer address, only support one NameServer cluster in alpha2

func WithRetry 

func WithRetry(retries int) Option

WithRetry return a Option that specifies the retry times when send failed. TODO: use retry middleware instead

func WithVIPChannel 

func WithVIPChannel(enable bool) Option

type PullConsumer 

type PullConsumer interface {
	// Start
	Start()

	// Shutdown refuse all new pull operation, finish all submitted.
	Shutdown()

	// Pull pull message of topic,  selector indicate which queue to pull.
	Pull(ctx context.Context, topic string, selector MessageSelector, numbers int) (*primitive.PullResult, error)

	// PullFrom pull messages of queue from the offset to offset + numbers
	PullFrom(ctx context.Context, queue *primitive.MessageQueue, offset int64, numbers int) (*primitive.PullResult, error)

	// updateOffset update offset of queue in mem
	UpdateOffset(queue *primitive.MessageQueue, offset int64) error

	// PersistOffset persist all offset in mem.
	PersistOffset(ctx context.Context) error

	// CurrentOffset return the current offset of queue in mem.
	CurrentOffset(queue *primitive.MessageQueue) (int64, error)
}

type PullRequest 

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

func (*PullRequest) String 

func (pr *PullRequest) String() string

type QueueLock 

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

Source Files

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