Package org.apache.shiro.event.support
Interface EventListener
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- All Known Subinterfaces:
TypedEventListener
- All Known Implementing Classes:
SingleArgumentMethodEventListener
public interface EventListener
An event listener knows how to accept and process events of a particular type (or types). Note that this interface is in the event implementation support package (and not the event package directly) because it is a supporting concept for event bus implementations and not something that most application developers using Shiro should implement directly. App developers should instead use theSubscribe
annotation on methods they wish to receive events. This interface therefore mainly represents a 'middle man' between the event bus and the actual subscribing component. As such, event bus implementors (or framework/infrastructural implementors) or those that wish to customize listener/dispatch functionality might find this concept useful. It is a concept almost always used in conjunction with aEventListenerResolver
implementation.- Since:
- 1.3
- See Also:
SingleArgumentMethodEventListener
,AnnotationEventListenerResolver
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description boolean
accepts(Object event)
Returnstrue
if the listener instance can process the specified event object,false
otherwise.void
onEvent(Object event)
Handles the specified event.
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