org.springframework.kafka.event

Class KafkaEvent

java.lang.Object

java.util.EventObject

org.springframework.context.ApplicationEvent

org.springframework.kafka.event.KafkaEvent

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

ConsumerPausedEvent, ConsumerResumedEvent, ConsumerStoppedEvent, ConsumerStoppingEvent, ContainerStoppedEvent, ListenerContainerIdleEvent, NonResponsiveConsumerEvent

public abstract class KafkaEvent
extends org.springframework.context.ApplicationEvent

Base class for events.

Author:

Gary Russell

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor and Description
KafkaEvent(java.lang.Object source) Deprecated.
KafkaEvent(java.lang.Object source, java.lang.Object container)

Method Summary

Modifier and Type	Method and Description
<T> T	getContainer(java.lang.Class<T> type) Get the container for which the event was published, which will be the parent container if the source that emitted the event is a child container, or the source itself otherwise.
<T> T	getSource(java.lang.Class<T> type) Get the container (source) that published the event.

Methods inherited from class org.springframework.context.ApplicationEvent

getTimestamp

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

KafkaEvent

@Deprecated
public KafkaEvent(java.lang.Object source)

Deprecated.

KafkaEvent

public KafkaEvent(java.lang.Object source,
                  java.lang.Object container)

Method Detail

getContainer

public <T> T getContainer(java.lang.Class<T> type)

Get the container for which the event was published, which will be the parent container if the source that emitted the event is a child container, or the source itself otherwise. The type is required here to avoid a dependency tangle between the event and listener packages.

Type Parameters:

T - the type.

Parameters:

type - the container type (e.g. MessageListenerContainer.class).

Returns:

the container.

Since:

2.2.1

See Also:

getSource(Class)

getSource

public <T> T getSource(java.lang.Class<T> type)

Get the container (source) that published the event. This is provided as an alternative to EventObject.getSource() to avoid the need to cast in user code. The type is required here to avoid a dependency tangle between the event and listener packages.

Type Parameters:

T - the type.

Parameters:

type - the container type (e.g. MessageListenerContainer.class).

Returns:

the container.

Since:

2.2.1

See Also:

getContainer(Class), EventObject.getSource()