Package io.microsphere.spring.context.event

Class DeferredApplicationEventPublisher

java.lang.Object

io.microsphere.spring.context.event.DeferredApplicationEventPublisher

All Implemented Interfaces:

EventListener, org.springframework.context.ApplicationEventPublisher, org.springframework.context.ApplicationListener<org.springframework.context.event.ContextRefreshedEvent>

public class DeferredApplicationEventPublisher
extends Object
implements org.springframework.context.ApplicationEventPublisher, org.springframework.context.ApplicationListener<org.springframework.context.event.ContextRefreshedEvent>

Before Spring Framework 4.2, AbstractApplicationContext is an implementation of ApplicationEventPublisher can't handle the early event that is published before ApplicationEventMulticaster's initialization, in this scenario, DeferredApplicationEventPublisher is introduced and used to resolve publishEvent(ApplicationEvent) too early to publish ApplicationEvent when Spring ApplicationContexts' ApplicationEventMulticaster is not ready. First, DeferredApplicationEventPublisher stores these early events temporarily, and then re-publish them on Application context is ready.

In contrast, If current runtime is based on Spring Framework that supports early application events, DeferredApplicationEventPublisher only delegates the Application Context that was injected by constructor.

Since:

1.0.0

Author:

Mercy

Constructor Summary

Constructors

Constructor	Description
DeferredApplicationEventPublisher(org.springframework.context.ApplicationEventPublisher delegate)

Method Summary

Modifier and Type	Method	Description
void	onApplicationEvent(org.springframework.context.event.ContextRefreshedEvent event)
void	publishEvent(Object event)	Current method will not be invoked before Spring 4.2
void	publishEvent(org.springframework.context.ApplicationEvent event)
protected boolean	supportsPublishEventMethod()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.context.ApplicationListener

supportsAsyncExecution

Constructor Details

DeferredApplicationEventPublisher

public DeferredApplicationEventPublisher(org.springframework.context.ApplicationEventPublisher delegate)

Parameters:

delegate - ApplicationEventPublisher

Method Details

supportsPublishEventMethod

protected boolean supportsPublishEventMethod()

publishEvent

public void publishEvent(org.springframework.context.ApplicationEvent event)

Specified by:

publishEvent in interface org.springframework.context.ApplicationEventPublisher

publishEvent

public void publishEvent(Object event)

Current method will not be invoked before Spring 4.2

Specified by:

publishEvent in interface org.springframework.context.ApplicationEventPublisher

Parameters:

event - the ApplicationEvent or the payload of event

onApplicationEvent

public void onApplicationEvent(org.springframework.context.event.ContextRefreshedEvent event)

Specified by:

onApplicationEvent in interface org.springframework.context.ApplicationListener<org.springframework.context.event.ContextRefreshedEvent>