Package de.otto.synapse.consumer

Class StatefulMessageConsumer<P,S>

java.lang.Object

de.otto.synapse.consumer.StatefulMessageConsumer<P,S>

Type Parameters:

P - the type of the Message payload

S - the type of the StateRepository entries

All Implemented Interfaces:

MessageConsumer<P>, java.util.function.Consumer<Message<P>>

public class StatefulMessageConsumer<P,S>
extends java.lang.Object
implements MessageConsumer<P>

A MessageConsumer that is updating a StateRepository.

Constructor Summary

Constructors

Constructor	Description
StatefulMessageConsumer(java.lang.String keyPattern, java.lang.Class<P> payloadType, StateRepository<S> stateRepository, java.util.function.BiFunction<java.util.Optional<S>,? super Message<P>,S> payloadToStateMapper, java.util.function.Function<? super Message<P>,java.lang.String> keyMapper)	Creates a StatefulMessageConsumer.
StatefulMessageConsumer(java.lang.String keyPattern, java.lang.Class<P> payloadType, StateRepository<S> stateRepository, java.util.function.BiFunction<java.util.Optional<S>,Message<P>,S> payloadToStateMapper)	Creates a StatefulMessageConsumer.
StatefulMessageConsumer(java.lang.String keyPattern, java.lang.Class<P> payloadType, StateRepository<S> stateRepository, java.util.function.Function<? super Message<P>,S> payloadToStateMapper, java.util.function.Function<? super Message<P>,java.lang.String> keyMapper)	Creates a StatefulMessageConsumer.
StatefulMessageConsumer(java.lang.String keyPattern, java.lang.Class<P> payloadType, StateRepository<S> stateRepository, java.util.function.Function<Message<P>,S> payloadToStateMapper)	Creates a StatefulMessageConsumer.

Method Summary

Modifier and Type	Method	Description
void	accept(Message<P> message)
java.util.regex.Pattern	keyPattern()	Returns the pattern of message keys accepted by this consumer.
java.lang.Class<P>	payloadType()	Returns the expected payload type of events consumed by this EventConsumer.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Consumer

andThen

Constructor Detail

StatefulMessageConsumer

public StatefulMessageConsumer(java.lang.String keyPattern,
                               java.lang.Class<P> payloadType,
                               StateRepository<S> stateRepository,
                               java.util.function.Function<Message<P>,S> payloadToStateMapper)

Creates a StatefulMessageConsumer.

The message's Key.partitionKey() is used as the key for repository entries.

Parameters:

keyPattern - the of-pattern of message keys accepted by this consumer.

payloadType - the payload type of the messages accepted by this consumer

stateRepository - the StateRepository that is holding the State

payloadToStateMapper - the mapper function used to map message payload to state entities

StatefulMessageConsumer

public StatefulMessageConsumer(java.lang.String keyPattern,
                               java.lang.Class<P> payloadType,
                               StateRepository<S> stateRepository,
                               java.util.function.BiFunction<java.util.Optional<S>,Message<P>,S> payloadToStateMapper)

Creates a StatefulMessageConsumer.

The message's Key.partitionKey() is used as the key for repository entries.

Parameters:

keyPattern - the of-pattern of message keys accepted by this consumer.

payloadType - the payload type of the messages accepted by this consumer

stateRepository - the StateRepository that is holding the State

payloadToStateMapper - the mapper function used to map message payload to state entities

StatefulMessageConsumer

public StatefulMessageConsumer(java.lang.String keyPattern,
                               java.lang.Class<P> payloadType,
                               StateRepository<S> stateRepository,
                               java.util.function.Function<? super Message<P>,S> payloadToStateMapper,
                               java.util.function.Function<? super Message<P>,java.lang.String> keyMapper)

Creates a StatefulMessageConsumer.

Parameters:

keyPattern - the of-pattern of message keys accepted by this consumer.

payloadType - the payload type of the messages accepted by this consumer

stateRepository - the StateRepository that is holding the State

payloadToStateMapper - the mapper function used to map message payload to state entities

keyMapper - the mapper function used to map message keys to StateRepository keys.

StatefulMessageConsumer

public StatefulMessageConsumer(java.lang.String keyPattern,
                               java.lang.Class<P> payloadType,
                               StateRepository<S> stateRepository,
                               java.util.function.BiFunction<java.util.Optional<S>,? super Message<P>,S> payloadToStateMapper,
                               java.util.function.Function<? super Message<P>,java.lang.String> keyMapper)

Creates a StatefulMessageConsumer.

Parameters:

keyPattern - the of-pattern of message keys accepted by this consumer.

payloadType - the payload type of the messages accepted by this consumer

stateRepository - the StateRepository that is holding the State

payloadToStateMapper - the mapper function used to map previous state entity and message payload to state entities

keyMapper - the mapper function used to map message keys to StateRepository keys.

Method Detail

payloadType

@Nonnull
public java.lang.Class<P> payloadType()

Returns the expected payload type of events consumed by this EventConsumer.

Specified by:

payloadType in interface MessageConsumer<P>

Returns:

payload type

keyPattern

@Nonnull
public java.util.regex.Pattern keyPattern()

Returns the pattern of message keys accepted by this consumer.

Specified by:

keyPattern in interface MessageConsumer<P>

Returns:

Pattern

accept

public void accept(Message<P> message)

Specified by:

accept in interface java.util.function.Consumer<P>