public class SourceFilteringListener extends Object implements GenericApplicationListener, SmartApplicationListener
ApplicationListener decorator that filters
events from a specified event source, invoking its delegate listener for
matching ApplicationEvent objects only.
Can also be used as base class, overriding the onApplicationEventInternal(org.springframework.context.ApplicationEvent)
method instead of specifying a delegate listener.
HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE| Modifier | Constructor and Description |
|---|---|
protected |
SourceFilteringListener(Object source)
Create a SourceFilteringListener for the given event source,
expecting subclasses to override the
onApplicationEventInternal(org.springframework.context.ApplicationEvent)
method (instead of specifying a delegate listener). |
|
SourceFilteringListener(Object source,
ApplicationListener<?> delegate)
Create a SourceFilteringListener for the given event source.
|
| Modifier and Type | Method and Description |
|---|---|
int |
getOrder()
Get the order value of this object.
|
void |
onApplicationEvent(ApplicationEvent event)
Handle an application event.
|
protected void |
onApplicationEventInternal(ApplicationEvent event)
Actually process the event, after having filtered according to the
desired event source already.
|
boolean |
supportsEventType(Class<? extends ApplicationEvent> eventType)
Determine whether this listener actually supports the given event type.
|
boolean |
supportsEventType(ResolvableType eventType)
Determine whether this listener actually supports the given event type.
|
boolean |
supportsSourceType(Class<?> sourceType)
Determine whether this listener actually supports the given source type.
|
public SourceFilteringListener(Object source, ApplicationListener<?> delegate)
source - the event source that this listener filters for,
only processing events from this sourcedelegate - the delegate listener to invoke with event
from the specified sourceprotected SourceFilteringListener(Object source)
onApplicationEventInternal(org.springframework.context.ApplicationEvent)
method (instead of specifying a delegate listener).source - the event source that this listener filters for,
only processing events from this sourcepublic void onApplicationEvent(ApplicationEvent event)
ApplicationListeneronApplicationEvent in interface ApplicationListener<ApplicationEvent>event - the event to respond topublic boolean supportsEventType(ResolvableType eventType)
GenericApplicationListenersupportsEventType in interface GenericApplicationListenereventType - the event type (never null)public boolean supportsEventType(Class<? extends ApplicationEvent> eventType)
SmartApplicationListenersupportsEventType in interface SmartApplicationListenereventType - the event type (never null)public boolean supportsSourceType(@Nullable Class<?> sourceType)
GenericApplicationListenersupportsSourceType in interface GenericApplicationListenersupportsSourceType in interface SmartApplicationListenersourceType - the source type, or null if no sourcepublic int getOrder()
OrderedHigher values are interpreted as lower priority. As a consequence,
the object with the lowest value has the highest priority (somewhat
analogous to Servlet load-on-startup values).
Same order values will result in arbitrary sort positions for the affected objects.
getOrder in interface OrderedOrdered.HIGHEST_PRECEDENCE,
Ordered.LOWEST_PRECEDENCEprotected void onApplicationEventInternal(ApplicationEvent event)
The default implementation invokes the specified delegate, if any.
event - the event to process (matching the specified source)