Package org.springframework.integration.redis.inbound

Class ReactiveRedisStreamMessageProducer

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.endpoint.AbstractEndpoint

org.springframework.integration.endpoint.MessageProducerSupport

org.springframework.integration.redis.inbound.ReactiveRedisStreamMessageProducer

All Implemented Interfaces:

Aware, BeanFactoryAware, BeanNameAware, DisposableBean, InitializingBean, SmartInitializingSingleton, ApplicationContextAware, Lifecycle, Phased, SmartLifecycle, ExpressionCapable, MessageProducer, IntegrationPattern, NamedComponent, ManageableLifecycle, ManageableSmartLifecycle, TrackableComponent

public class ReactiveRedisStreamMessageProducer
extends MessageProducerSupport

A MessageProducerSupport for reading messages from a Redis Stream and publishing them into the provided output channel. By default this adapter reads message as a standalone client XREAD (Redis command) but can be switched to a Consumer Group feature XREADGROUP by setting consumerName field. By default the Consumer Group name is the id of this bean IntegrationObjectSupport.getBeanName().

Since:

5.4

Author:

Attoumane Ahamadi, Artem Bilan, Rohan Mukesh

Field Summary

Fields inherited from class org.springframework.integration.endpoint.AbstractEndpoint

lifecycleCondition, lifecycleLock

Fields inherited from class org.springframework.integration.context.IntegrationObjectSupport

EXPRESSION_PARSER, logger

Fields inherited from interface org.springframework.context.SmartLifecycle

DEFAULT_PHASE

Constructor Summary

Constructors

Constructor	Description
ReactiveRedisStreamMessageProducer(ReactiveRedisConnectionFactory reactiveConnectionFactory, String streamKey)

Method Summary

Modifier and Type	Method	Description
protected void	doStart()	Take no action by default.
String	getComponentType()	Subclasses may implement this method to provide component type information.
protected void	onInit()	Subclasses may implement this for initialization logic.
void	setAutoAck(boolean autoAck)	Set whether or not acknowledge message read in the Consumer Group.
void	setBatchSize(int recordsPerPoll)	Configure a batch size for the COUNT option during reading.
void	setConsumerGroup(String consumerGroup)	Set the name of the Consumer Group.
void	setConsumerName(String consumerName)	Set the name of the consumer.
void	setCreateConsumerGroup(boolean createConsumerGroup)	Create the Consumer Group if and only if it does not exist.
void	setExtractPayload(boolean extractPayload)	Configure this channel adapter to extract or not value from the Record.
void	setObjectMapper(HashMapper<?,?,?> hashMapper)	Configure a hash mapper.
void	setOnErrorResume(Function<? super Throwable,? extends org.reactivestreams.Publisher<Void>> resumeFunction)	Configure a resume Function to resume the main sequence when polling the stream fails.
void	setPollTimeout(Duration pollTimeout)	Configure a poll timeout for the BLOCK option during reading.
void	setReadOffset(ReadOffset readOffset)	Define the offset from which we want to read message.
void	setSerializer(RedisSerializationContext.SerializationPair<?> pair)	Configure a key, hash key and hash value serializer.
void	setStreamReceiverOptions(StreamReceiver.StreamReceiverOptions<String,?> streamReceiverOptions)	Set ReactiveStreamOperations used to customize the StreamReceiver.
void	setTargetType(Class<?> targetType)	Configure a hash target type.

Methods inherited from class org.springframework.integration.endpoint.MessageProducerSupport

afterSingletonsInstantiated, buildErrorMessage, doStop, getErrorChannel, getErrorMessageAttributes, getErrorMessageStrategy, getIntegrationPatternType, getMessagingTemplate, getOutputChannel, sendErrorMessageIfNecessary, sendMessage, setErrorChannel, setErrorChannelName, setErrorMessageStrategy, setOutputChannel, setOutputChannelName, setSendTimeout, setShouldTrack, subscribeToPublisher

Methods inherited from class org.springframework.integration.endpoint.AbstractEndpoint

destroy, doStop, getPhase, getRole, isActive, isAutoStartup, isRunning, setAutoStartup, setPhase, setRole, start, stop, stop

Methods inherited from class org.springframework.integration.context.IntegrationObjectSupport

afterPropertiesSet, extractTypeIfPossible, generateId, getApplicationContext, getApplicationContextId, getBeanDescription, getBeanFactory, getBeanName, getChannelResolver, getComponentName, getConversionService, getExpression, getIntegrationProperties, getIntegrationProperty, getMessageBuilderFactory, getTaskScheduler, isInitialized, setApplicationContext, setBeanFactory, setBeanName, setChannelResolver, setComponentName, setConversionService, setMessageBuilderFactory, setPrimaryExpression, setTaskScheduler, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.springframework.integration.support.context.NamedComponent

getBeanName, getComponentName

Constructor Details

ReactiveRedisStreamMessageProducer

public ReactiveRedisStreamMessageProducer(ReactiveRedisConnectionFactory reactiveConnectionFactory,
 String streamKey)

Method Details

setReadOffset

public void setReadOffset(ReadOffset readOffset)

Define the offset from which we want to read message. By default the ReadOffset.latest() is used. ReadOffset.latest() is equal to '$', which is the Id used with XREAD to get new data added to the stream. Note that when switching to the Consumer Group feature, we set it to ReadOffset.lastConsumed() if it is still equal to ReadOffset.latest().

Parameters:

readOffset - the desired offset

setExtractPayload

public void setExtractPayload(boolean extractPayload)

Configure this channel adapter to extract or not value from the Record.

Parameters:

extractPayload - default true

setAutoAck

public void setAutoAck(boolean autoAck)

Set whether or not acknowledge message read in the Consumer Group. true by default.

Parameters:

autoAck - the acknowledge option.

setConsumerGroup

public void setConsumerGroup(@Nullable
 String consumerGroup)

Set the name of the Consumer Group. It is possible to create that Consumer Group if desired, see: createConsumerGroup. If not set, the defined bean name IntegrationObjectSupport.getBeanName() is used.

Parameters:

consumerGroup - the Consumer Group on which this adapter should register to listen messages.

setConsumerName

public void setConsumerName(@Nullable
 String consumerName)

Set the name of the consumer. When a consumer name is provided, this adapter is switched to the Consumer Group feature. Note that this value should be unique in the group.

Parameters:

consumerName - the consumer name in the Consumer Group

setCreateConsumerGroup

public void setCreateConsumerGroup(boolean createConsumerGroup)

Create the Consumer Group if and only if it does not exist. During the creation we also create the stream, see MKSTREAM.

Parameters:

createConsumerGroup - specify if we should create the Consumer Group, false by default

setStreamReceiverOptions

public void setStreamReceiverOptions(@Nullable
 StreamReceiver.StreamReceiverOptions<String,?> streamReceiverOptions)

Set ReactiveStreamOperations used to customize the StreamReceiver. It provides a way to set the polling timeout and the serialization context. By default the polling timeout is set to infinite and StringRedisSerializer is used. Mutually exclusive with 'pollTimeout', 'batchSize', 'onErrorResume', 'serializer', 'targetType', 'objectMapper'.

Parameters:

streamReceiverOptions - the desired receiver options

setPollTimeout

public void setPollTimeout(Duration pollTimeout)

Configure a poll timeout for the BLOCK option during reading. Mutually exclusive with setStreamReceiverOptions(StreamReceiver.StreamReceiverOptions).

Parameters:

pollTimeout - the timeout for polling.

Since:

5.5

See Also:

• StreamReceiver.StreamReceiverOptionsBuilder.pollTimeout(Duration)

setBatchSize

public void setBatchSize(int recordsPerPoll)

Configure a batch size for the COUNT option during reading. Mutually exclusive with setStreamReceiverOptions(StreamReceiver.StreamReceiverOptions).

Parameters:

recordsPerPoll - must be greater zero.

Since:

5.5

See Also:

• StreamReceiver.StreamReceiverOptionsBuilder.batchSize(int)

setOnErrorResume

public void setOnErrorResume(Function<? super Throwable,? extends org.reactivestreams.Publisher<Void>> resumeFunction)

Configure a resume Function to resume the main sequence when polling the stream fails. Mutually exclusive with setStreamReceiverOptions(StreamReceiver.StreamReceiverOptions). By default this function extract the failed Record and sends an ErrorMessage to the provided MessageProducerSupport.setErrorChannel(org.springframework.messaging.MessageChannel). The failed message for this record may have a IntegrationMessageHeaderAccessor.ACKNOWLEDGMENT_CALLBACK header when manual acknowledgment is configured for this message producer.

Parameters:

resumeFunction - must not be null.

Since:

5.5

See Also:

• StreamReceiver.StreamReceiverOptionsBuilder.onErrorResume(Function)

setSerializer

public void setSerializer(RedisSerializationContext.SerializationPair<?> pair)

Configure a key, hash key and hash value serializer. Mutually exclusive with setStreamReceiverOptions(StreamReceiver.StreamReceiverOptions).

Parameters:

pair - must not be null.

Since:

5.5

See Also:

• StreamReceiver.StreamReceiverOptionsBuilder.serializer(RedisSerializationContext)

setTargetType

public void setTargetType(Class<?> targetType)

Configure a hash target type. Changes the emitted Record type to ObjectRecord. Mutually exclusive with setStreamReceiverOptions(StreamReceiver.StreamReceiverOptions).

Parameters:

targetType - must not be null.

Since:

5.5

See Also:

• StreamReceiver.StreamReceiverOptionsBuilder.targetType(Class)

setObjectMapper

public void setObjectMapper(HashMapper<?,?,?> hashMapper)

Configure a hash mapper. Mutually exclusive with setStreamReceiverOptions(StreamReceiver.StreamReceiverOptions).

Parameters:

hashMapper - must not be null.

Since:

5.5

See Also:

• StreamReceiver.StreamReceiverOptionsBuilder.objectMapper(HashMapper)

getComponentType

public String getComponentType()

Description copied from class: IntegrationObjectSupport

Subclasses may implement this method to provide component type information.

Specified by:

getComponentType in interface NamedComponent

Overrides:

getComponentType in class IntegrationObjectSupport

onInit

protected void onInit()

Description copied from class: IntegrationObjectSupport

Subclasses may implement this for initialization logic.

Overrides:

onInit in class MessageProducerSupport

doStart

protected void doStart()

Description copied from class: MessageProducerSupport

Take no action by default. Subclasses may override this if they need lifecycle-managed behavior. Protected by 'lifecycleLock'.

Overrides:

doStart in class MessageProducerSupport