org.springframework.context.event

Interface GenericApplicationListener

All Superinterfaces:

ApplicationListener<ApplicationEvent>, java.util.EventListener, Ordered

All Known Implementing Classes:

ApplicationListenerMethodAdapter, GenericApplicationListenerAdapter, SourceFilteringListener

public interface GenericApplicationListener
extends ApplicationListener<ApplicationEvent>, Ordered

Extended variant of the standard ApplicationListener interface, exposing further metadata such as the supported event and source type.

As of Spring Framework 4.2, this interface supersedes the Class-based SmartApplicationListener with full handling of generic event types.

Since:

4.2

Author:

Stephane Nicoll

See Also:

SmartApplicationListener, GenericApplicationListenerAdapter

Field Summary

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Method Summary

Modifier and Type	Method and Description
default int	getOrder() Determine this listener's order in a set of listeners for the same event.
boolean	supportsEventType(ResolvableType eventType) Determine whether this listener actually supports the given event type.
default boolean	supportsSourceType(java.lang.Class<?> sourceType) Determine whether this listener actually supports the given source type.

Methods inherited from interface org.springframework.context.ApplicationListener

onApplicationEvent

Method Detail

supportsEventType

boolean supportsEventType(ResolvableType eventType)

Determine whether this listener actually supports the given event type.

Parameters:

eventType - the event type (never null)

supportsSourceType

default boolean supportsSourceType(@Nullable
                                   java.lang.Class<?> sourceType)

Determine whether this listener actually supports the given source type.

The default implementation always returns true.

Parameters:

sourceType - the source type, or null if no source

getOrder

default int getOrder()

Determine this listener's order in a set of listeners for the same event.

The default implementation returns Ordered.LOWEST_PRECEDENCE.

Specified by:

getOrder in interface Ordered

Returns:

the order value

See Also:

Ordered.HIGHEST_PRECEDENCE, Ordered.LOWEST_PRECEDENCE