org.springframework.context.event

Interface ApplicationEventMulticaster

All Known Implementing Classes:

AbstractApplicationEventMulticaster, SimpleApplicationEventMulticaster

public interface ApplicationEventMulticaster

Interface to be implemented by objects that can manage a number of ApplicationListener objects and publish events to them.

An ApplicationEventPublisher, typically a Spring ApplicationContext, can use an ApplicationEventMulticaster as a delegate for actually publishing events.

Author:

Rod Johnson, Juergen Hoeller, Stephane Nicoll

See Also:

ApplicationListener

Method Summary

Modifier and Type	Method and Description
void	addApplicationListener(ApplicationListener<?> listener) Add a listener to be notified of all events.
void	addApplicationListenerBean(String listenerBeanName) Add a listener bean to be notified of all events.
void	multicastEvent(ApplicationEvent event) Multicast the given application event to appropriate listeners.
void	multicastEvent(ApplicationEvent event, ResolvableType eventType) Multicast the given application event to appropriate listeners.
void	removeAllListeners() Remove all listeners registered with this multicaster.
void	removeApplicationListener(ApplicationListener<?> listener) Remove a listener from the notification list.
void	removeApplicationListenerBean(String listenerBeanName) Remove a listener bean from the notification list.

Method Detail

addApplicationListener

void addApplicationListener(ApplicationListener<?> listener)

Add a listener to be notified of all events.

Parameters:

listener - the listener to add

addApplicationListenerBean

void addApplicationListenerBean(String listenerBeanName)

Add a listener bean to be notified of all events.

Parameters:

listenerBeanName - the name of the listener bean to add

removeApplicationListener

void removeApplicationListener(ApplicationListener<?> listener)

Remove a listener from the notification list.

Parameters:

listener - the listener to remove

removeApplicationListenerBean

void removeApplicationListenerBean(String listenerBeanName)

Remove a listener bean from the notification list.

Parameters:

listenerBeanName - the name of the listener bean to remove

removeAllListeners

void removeAllListeners()

Remove all listeners registered with this multicaster.

After a remove call, the multicaster will perform no action on event notification until new listeners are registered.

multicastEvent

void multicastEvent(ApplicationEvent event)

Multicast the given application event to appropriate listeners.

Consider using multicastEvent(ApplicationEvent, ResolvableType) if possible as it provides better support for generics-based events.

Parameters:

event - the event to multicast

multicastEvent

void multicastEvent(ApplicationEvent event,
                    @Nullable
                    ResolvableType eventType)

Multicast the given application event to appropriate listeners.

If the eventType is null, a default type is built based on the event instance.

Parameters:

event - the event to multicast

eventType - the type of event (can be null)

Since:

4.2