spring5事件机制
所属分类 spring
浏览量 1298
org.springframework.context.ApplicationListener
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.PayloadApplicationEvent;
public class MyApplicationListener implements ApplicationListener{
public void onApplicationEvent(ApplicationEvent event) {
System.out.println("event="+event+","+event.getClass());
if(event instanceof PayloadApplicationEvent){
PayloadApplicationEvent pevent = (PayloadApplicationEvent)event;
Object payload = pevent.getPayload();
Object source = pevent.getSource();
System.out.println("payload="+payload+",source="+source);
}
}
}
MyApplicationListener 配置为一个 bean
import org.springframework.context.ApplicationEvent;
public class MyEvent extends ApplicationEvent{
public MyEvent(Object source){
super(source);
}
}
ctx.publishEvent("payload-event");
ctx.publishEvent(new MyEvent("my-event"));
支持发布 ApplicationEvent 及 普通的事件 使用 PayloadApplicationEvent 包装
public class PayloadApplicationEvent extends ApplicationEvent
ContextRefreshedEvent
ContextClosedEvent
event=spring5.MyEvent[source=my-event],class spring5.MyEvent
event=org.springframework.context.PayloadApplicationEvent[source=org.springframework.context.annotation.AnnotationConfigApplicationContext@4f7d0008: startup date [Mon Jun 17 17:56:50 CST 2019]; root of context hierarchy],class org.springframework.context.PayloadApplicationEvent
payload=payload-event,source=org.springframework.context.annotation.AnnotationConfigApplicationContext@4f7d0008: startup date [Mon Jun 17 17:56:50 CST 2019]; root of context hierarchy
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