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java.lang.Object org.springframework.context.event.SourceFilteringListener
public class SourceFilteringListener
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.
Field Summary |
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Fields inherited from interface org.springframework.core.Ordered |
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HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE |
Constructor Summary | |
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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). |
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SourceFilteringListener(Object source,
ApplicationListener delegate)
Create a SourceFilteringListener for the given event source. |
Method Summary | |
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int |
getOrder()
Return the order value of this object, with a higher value meaning greater in terms of sorting. |
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 |
supportsSourceType(Class<?> sourceType)
Determine whether this listener actually supports the given source type. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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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 sourceMethod Detail |
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public void onApplicationEvent(ApplicationEvent event)
ApplicationListener
onApplicationEvent
in interface ApplicationListener<ApplicationEvent>
event
- the event to respond topublic boolean supportsEventType(Class<? extends ApplicationEvent> eventType)
SmartApplicationListener
supportsEventType
in interface SmartApplicationListener
public boolean supportsSourceType(Class<?> sourceType)
SmartApplicationListener
supportsSourceType
in interface SmartApplicationListener
public int getOrder()
Ordered
Normally starting with 0, with Integer.MAX_VALUE
indicating the greatest value. Same order values will result
in arbitrary positions for the affected objects.
Higher values can be interpreted as lower priority. As a consequence, the object with the lowest value has highest priority (somewhat analogous to Servlet "load-on-startup" values).
getOrder
in interface Ordered
protected void onApplicationEventInternal(ApplicationEvent event)
The default implementation invokes the specified delegate, if any.
event
- the event to process (matching the specified source)
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