input

package
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 Go to latest Published: Jul 17, 2018 License: MIT Imports: 32 Imported by: 0

Documentation

Overview

Package input defines consumers for aggregating data from a variety of sources. All consumer types must implement interface input.Type.

If the source of a consumer is given assurances of message receipt then the consumer must ensure that all messages read from a source are propagated to a reader before shutting down gracefully. For example, a ZMQ subscriber model based consumer would not need to provide such ensurance, a HTTP POST based consumer, however, would be expected to propagate any requests where a 200 OK message has been returned.

Index

Constants

This section is empty.

Variables

View Source 
var Constructors = map[string]TypeSpec{}

Constructors is a map of all input types with their specs.

View Source 
var (
	// ErrBrokerNoInputs is returned when creating a broker with zero inputs.
	ErrBrokerNoInputs = errors.New("attempting to create broker input type with no inputs")
)

Functions

func Descriptions 

func Descriptions() string

Descriptions returns a formatted string of descriptions for each type.

func SanitiseConfig 

func SanitiseConfig(conf Config) (interface{}, error)

SanitiseConfig returns a sanitised version of the Config, meaning sections that aren't relevant to behaviour are removed.

Types

type BrokerConfig 

type BrokerConfig struct {
	Copies int             `json:"copies" yaml:"copies"`
	Inputs brokerInputList `json:"inputs" yaml:"inputs"`
}

BrokerConfig is configuration for the Broker input type.

func NewBrokerConfig 

func NewBrokerConfig() BrokerConfig

NewBrokerConfig creates a new BrokerConfig with default values.

type Config 

type Config struct {
	Type          string                     `json:"type" yaml:"type"`
	AmazonS3      reader.AmazonS3Config      `json:"amazon_s3" yaml:"amazon_s3"`
	AmazonSQS     reader.AmazonSQSConfig     `json:"amazon_sqs" yaml:"amazon_sqs"`
	AMQP          reader.AMQPConfig          `json:"amqp" yaml:"amqp"`
	Broker        BrokerConfig               `json:"broker" yaml:"broker"`
	Dynamic       DynamicConfig              `json:"dynamic" yaml:"dynamic"`
	File          FileConfig                 `json:"file" yaml:"file"`
	Files         reader.FilesConfig         `json:"files" yaml:"files"`
	HTTPClient    HTTPClientConfig           `json:"http_client" yaml:"http_client"`
	HTTPServer    HTTPServerConfig           `json:"http_server" yaml:"http_server"`
	Inproc        InprocConfig               `json:"inproc" yaml:"inproc"`
	Kafka         reader.KafkaConfig         `json:"kafka" yaml:"kafka"`
	KafkaBalanced reader.KafkaBalancedConfig `json:"kafka_balanced" yaml:"kafka_balanced"`
	MQTT          reader.MQTTConfig          `json:"mqtt" yaml:"mqtt"`
	NATS          reader.NATSConfig          `json:"nats" yaml:"nats"`
	NATSStream    reader.NATSStreamConfig    `json:"nats_stream" yaml:"nats_stream"`
	NSQ           reader.NSQConfig           `json:"nsq" yaml:"nsq"`
	ReadUntil     ReadUntilConfig            `json:"read_until" yaml:"read_until"`
	RedisList     reader.RedisListConfig     `json:"redis_list" yaml:"redis_list"`
	RedisPubSub   reader.RedisPubSubConfig   `json:"redis_pubsub" yaml:"redis_pubsub"`
	ScaleProto    reader.ScaleProtoConfig    `json:"scalability_protocols" yaml:"scalability_protocols"`
	STDIN         STDINConfig                `json:"stdin" yaml:"stdin"`
	Websocket     reader.WebsocketConfig     `json:"websocket" yaml:"websocket"`
	ZMQ4          *reader.ZMQ4Config         `json:"zmq4,omitempty" yaml:"zmq4,omitempty"`
	Processors    []processor.Config         `json:"processors" yaml:"processors"`
}

Config is the all encompassing configuration struct for all input types. Note that some configs are empty structs, as the type has no optional values but we want to list it as an option.

func NewConfig 

func NewConfig() Config

NewConfig returns a configuration struct fully populated with default values.

func (*Config) UnmarshalJSON 

func (c *Config) UnmarshalJSON(bytes []byte) error

UnmarshalJSON ensures that when parsing configs that are in a map or slice the default values are still applied.

func (*Config) UnmarshalYAML 

func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML ensures that when parsing configs that are in a map or slice the default values are still applied.

type DynamicConfig 

type DynamicConfig struct {
	Inputs    map[string]Config `json:"inputs" yaml:"inputs"`
	Prefix    string            `json:"prefix" yaml:"prefix"`
	TimeoutMS int               `json:"timeout_ms" yaml:"timeout_ms"`
}

DynamicConfig is configuration for the Dynamic input type.

func NewDynamicConfig 

func NewDynamicConfig() DynamicConfig

NewDynamicConfig creates a new DynamicConfig with default values.

type FileConfig 

type FileConfig struct {
	Path      string `json:"path" yaml:"path"`
	Multipart bool   `json:"multipart" yaml:"multipart"`
	MaxBuffer int    `json:"max_buffer" yaml:"max_buffer"`
	Delim     string `json:"delimiter" yaml:"delimiter"`
}

FileConfig is configuration values for the File input type.

func NewFileConfig 

func NewFileConfig() FileConfig

NewFileConfig creates a new FileConfig with default values.

type HTTPClient 

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

HTTPClient is an output type that pushes messages to HTTPClient.

func (*HTTPClient) CloseAsync 

func (h *HTTPClient) CloseAsync()

CloseAsync shuts down the HTTPClient output and stops processing messages.

func (*HTTPClient) TransactionChan 

func (h *HTTPClient) TransactionChan() <-chan types.Transaction

TransactionChan returns the transactions channel.

func (*HTTPClient) WaitForClose 

func (h *HTTPClient) WaitForClose(timeout time.Duration) error

WaitForClose blocks until the HTTPClient output has closed down.

type HTTPClientConfig 

type HTTPClientConfig struct {
	client.Config `json:",inline" yaml:",inline"`
	Payload       string       `json:"payload" yaml:"payload"`
	Stream        StreamConfig `json:"stream" yaml:"stream"`
}

HTTPClientConfig is configuration for the HTTPClient output type.

func NewHTTPClientConfig 

func NewHTTPClientConfig() HTTPClientConfig

NewHTTPClientConfig creates a new HTTPClientConfig with default values.

type HTTPServer 

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

HTTPServer is an input type that serves HTTPServer POST requests.

func (*HTTPServer) CloseAsync 

func (h *HTTPServer) CloseAsync()

CloseAsync shuts down the HTTPServer input and stops processing requests.

func (*HTTPServer) TransactionChan 

func (h *HTTPServer) TransactionChan() <-chan types.Transaction

TransactionChan returns the transactions channel.

func (*HTTPServer) WaitForClose 

func (h *HTTPServer) WaitForClose(timeout time.Duration) error

WaitForClose blocks until the HTTPServer input has closed down.

type HTTPServerConfig 

type HTTPServerConfig struct {
	Address   string `json:"address" yaml:"address"`
	Path      string `json:"path" yaml:"path"`
	WSPath    string `json:"ws_path" yaml:"ws_path"`
	TimeoutMS int64  `json:"timeout_ms" yaml:"timeout_ms"`
	CertFile  string `json:"cert_file" yaml:"cert_file"`
	KeyFile   string `json:"key_file" yaml:"key_file"`
}

HTTPServerConfig is configuration for the HTTPServer input type.

func NewHTTPServerConfig 

func NewHTTPServerConfig() HTTPServerConfig

NewHTTPServerConfig creates a new HTTPServerConfig with default values.

type Inproc 

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

Inproc is an input type that reads from a named pipe.

func (*Inproc) CloseAsync 

func (i *Inproc) CloseAsync()

CloseAsync shuts down the Inproc input and stops processing requests.

func (*Inproc) TransactionChan 

func (i *Inproc) TransactionChan() <-chan types.Transaction

TransactionChan returns the transactions channel.

func (*Inproc) WaitForClose 

func (i *Inproc) WaitForClose(timeout time.Duration) error

WaitForClose blocks until the Inproc input has closed down.

type InprocConfig 

type InprocConfig string

InprocConfig is a configuration type for the inproc input.

func NewInprocConfig 

func NewInprocConfig() InprocConfig

NewInprocConfig creates a new inproc input config.

type ReadUntil 

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

ReadUntil is an input type that reads from a ReadUntil instance.

func (*ReadUntil) CloseAsync 

func (r *ReadUntil) CloseAsync()

CloseAsync shuts down the ReadUntil input and stops processing requests.

func (*ReadUntil) TransactionChan 

func (r *ReadUntil) TransactionChan() <-chan types.Transaction

TransactionChan returns the transactions channel.

func (*ReadUntil) WaitForClose 

func (r *ReadUntil) WaitForClose(timeout time.Duration) error

WaitForClose blocks until the ReadUntil input has closed down.

type ReadUntilConfig 

type ReadUntilConfig struct {
	Input     *Config          `json:"input" yaml:"input"`
	Restart   bool             `json:"restart_input" yaml:"restart_input"`
	Condition condition.Config `json:"condition" yaml:"condition"`
}

ReadUntilConfig is configuration values for the ReadUntil input type.

func NewReadUntilConfig 

func NewReadUntilConfig() ReadUntilConfig

NewReadUntilConfig creates a new ReadUntilConfig with default values.

func (ReadUntilConfig) MarshalJSON 

func (r ReadUntilConfig) MarshalJSON() ([]byte, error)

MarshalJSON prints an empty object instead of nil.

func (ReadUntilConfig) MarshalYAML 

func (r ReadUntilConfig) MarshalYAML() (interface{}, error)

MarshalYAML prints an empty object instead of nil.

type Reader 

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

Reader is an input type that reads from a Reader instance.

func (*Reader) CloseAsync 

func (r *Reader) CloseAsync()

CloseAsync shuts down the Reader input and stops processing requests.

func (*Reader) TransactionChan 

func (r *Reader) TransactionChan() <-chan types.Transaction

TransactionChan returns the transactions channel.

func (*Reader) WaitForClose 

func (r *Reader) WaitForClose(timeout time.Duration) error

WaitForClose blocks until the Reader input has closed down.

type STDINConfig 

type STDINConfig struct {
	Multipart bool   `json:"multipart" yaml:"multipart"`
	MaxBuffer int    `json:"max_buffer" yaml:"max_buffer"`
	Delim     string `json:"delimiter" yaml:"delimiter"`
}

STDINConfig contains config fields for the STDIN input type.

func NewSTDINConfig 

func NewSTDINConfig() STDINConfig

NewSTDINConfig creates a STDINConfig populated with default values.

type StreamConfig 

type StreamConfig struct {
	Enabled   bool   `json:"enabled" yaml:"enabled"`
	Reconnect bool   `json:"reconnect" yaml:"reconnect"`
	Multipart bool   `json:"multipart" yaml:"multipart"`
	MaxBuffer int    `json:"max_buffer" yaml:"max_buffer"`
	Delim     string `json:"delimiter" yaml:"delimiter"`
}

StreamConfig contains fields for specifiying stream consumption behaviour.

type Type 

type Type interface {
	types.Closable
	types.Producer
}

Type is the standard interface of an input type.

func New 

func New(
	conf Config,
	mgr types.Manager,
	log log.Modular,
	stats metrics.Type,
	pipelines ...pipeline.ConstructorFunc,
) (Type, error)

New creates an input type based on an input configuration.

func NewAMQP 

func NewAMQP(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewAMQP creates a new AMQP input type.

func NewAmazonS3 

func NewAmazonS3(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewAmazonS3 creates a new amazon S3 input type.

func NewAmazonSQS 

func NewAmazonSQS(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewAmazonSQS creates a new Amazon SQS input type.

func NewBroker 

func NewBroker(
	conf Config,
	mgr types.Manager,
	log log.Modular,
	stats metrics.Type,
	pipelines ...pipeline.ConstructorFunc,
) (Type, error)

NewBroker creates a new Broker input type.

func NewDynamic 

func NewDynamic(
	conf Config,
	mgr types.Manager,
	log log.Modular,
	stats metrics.Type,
	pipelines ...pipeline.ConstructorFunc,
) (Type, error)

NewDynamic creates a new Dynamic input type.

func NewFile 

func NewFile(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewFile creates a new File input type.

func NewFiles 

func NewFiles(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewFiles creates a new Files input type.

func NewHTTPClient 

func NewHTTPClient(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewHTTPClient creates a new HTTPClient output type.

func NewHTTPServer 

func NewHTTPServer(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewHTTPServer creates a new HTTPServer input type.

func NewInproc 

func NewInproc(
	conf Config,
	mgr types.Manager,
	log log.Modular,
	stats metrics.Type,
) (Type, error)

NewInproc creates a new Inproc input type.

func NewKafka 

func NewKafka(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewKafka creates a new Kafka input type.

func NewKafkaBalanced 

func NewKafkaBalanced(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewKafkaBalanced creates a new KafkaBalanced input type.

func NewMQTT 

func NewMQTT(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewMQTT create a new MQTT input type.

func NewNATS 

func NewNATS(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewNATS creates a new NATS input type.

func NewNATSStream 

func NewNATSStream(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewNATSStream creates a new NATSStream input type.

func NewNSQ 

func NewNSQ(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewNSQ create a new NSQ input type.

func NewReadUntil 

func NewReadUntil(
	conf Config,
	mgr types.Manager,
	log log.Modular,
	stats metrics.Type,
) (Type, error)

NewReadUntil creates a new ReadUntil input type.

func NewReader 

func NewReader(
	typeStr string,
	r reader.Type,
	log log.Modular,
	stats metrics.Type,
) (Type, error)

NewReader creates a new Reader input type.

func NewRedisList 

func NewRedisList(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewRedisList creates a new Redis List input type.

func NewRedisPubSub 

func NewRedisPubSub(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewRedisPubSub creates a new RedisPubSub input type.

func NewSTDIN 

func NewSTDIN(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewSTDIN creates a new STDIN input type.

func NewScaleProto 

func NewScaleProto(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewScaleProto creates a new ScaleProto input type.

func NewWebsocket 

func NewWebsocket(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error)

NewWebsocket creates a new Websocket input type.

func WrapWithPipelines 

func WrapWithPipelines(in Type, pipeConstructors ...pipeline.ConstructorFunc) (Type, error)

WrapWithPipelines wraps an input with a variadic number of pipelines.

type TypeSpec 

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

TypeSpec is a constructor and a usage description for each input type.

type WithPipeline 

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

WithPipeline is a type that wraps both an input type and a pipeline type by routing the input through the pipeline, and implements the input.Type interface in order to act like an ordinary input.

func WrapWithPipeline 

func WrapWithPipeline(in Type, pipeConstructor pipeline.ConstructorFunc) (*WithPipeline, error)

WrapWithPipeline routes an input directly into a processing pipeline and returns a type that manages both and acts like an ordinary input.

func (*WithPipeline) CloseAsync 

func (i *WithPipeline) CloseAsync()

CloseAsync triggers a closure of this object but does not block.

func (*WithPipeline) TransactionChan 

func (i *WithPipeline) TransactionChan() <-chan types.Transaction

TransactionChan returns the channel used for consuming transactions from this input.

func (*WithPipeline) WaitForClose 

func (i *WithPipeline) WaitForClose(timeout time.Duration) error

WaitForClose is a blocking call to wait until the object has finished closing down and cleaning up resources.

Source Files

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Directories

Path Synopsis
Package reader defines implementations of an interface for generic message reading from various third party sources.
 Package reader defines implementations of an interface for generic message reading from various third party sources.

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