org.axonframework.kafka.eventhandling.consumer

Class KafkaMessageStream

java.lang.Object

org.axonframework.kafka.eventhandling.consumer.KafkaMessageStream

All Implemented Interfaces:

AutoCloseable, org.axonframework.common.stream.BlockingStream<org.axonframework.eventhandling.TrackedEventMessage<?>>, org.axonframework.eventsourcing.eventstore.TrackingEventStream

public class KafkaMessageStream
extends Object
implements org.axonframework.eventsourcing.eventstore.TrackingEventStream

Create message stream from a specific kafka topic. Messages are fetch in bulk and stored in an in-memory buffer. We try to introduce some sort and stored them in a local buffer. Consumer position is tracked via KafkaTrackingTokenRecords are fetched from kafka and stored in-memory buffer.

This is not thread safe

Since:

3.0

Author:

Allard Buijze, Nakul Mishra

Constructor Summary

Constructors

Constructor and Description
KafkaMessageStream(Buffer<KafkaEventMessage> buffer, Runnable closeHandler)

Method Summary

Modifier and Type	Method and Description
void	close()
boolean	hasNextAvailable(int timeout, TimeUnit unit)
org.axonframework.eventhandling.TrackedEventMessage<?>	nextAvailable()
Optional<org.axonframework.eventhandling.TrackedEventMessage<?>>	peek()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axonframework.common.stream.BlockingStream

asStream, hasNextAvailable

Constructor Detail

KafkaMessageStream

public KafkaMessageStream(Buffer<KafkaEventMessage> buffer,
                          Runnable closeHandler)

Method Detail

peek

public Optional<org.axonframework.eventhandling.TrackedEventMessage<?>> peek()

Specified by:

peek in interface org.axonframework.common.stream.BlockingStream<org.axonframework.eventhandling.TrackedEventMessage<?>>

hasNextAvailable

public boolean hasNextAvailable(int timeout,
                                TimeUnit unit)

Specified by:

hasNextAvailable in interface org.axonframework.common.stream.BlockingStream<org.axonframework.eventhandling.TrackedEventMessage<?>>

nextAvailable

public org.axonframework.eventhandling.TrackedEventMessage<?> nextAvailable()

Specified by:

nextAvailable in interface org.axonframework.common.stream.BlockingStream<org.axonframework.eventhandling.TrackedEventMessage<?>>

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface org.axonframework.common.stream.BlockingStream<org.axonframework.eventhandling.TrackedEventMessage<?>>