Spring Cloud

事件驱动

package com.shanghai.springcloud20181022.event;


import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class SpringEventListener {
    public static void main(String[] args) {
        AnnotationConfigApplicationContext annotationConfigApplicationContext=new AnnotationConfigApplicationContext();
        //增加监听器
        annotationConfigApplicationContext.addApplicationListener(new WansonApplicationLister());

        //上下文启动
        annotationConfigApplicationContext.refresh();

        //发布事件
        annotationConfigApplicationContext.publishEvent(new WandonApplicationEvent("hello world"));
        annotationConfigApplicationContext.publishEvent(new WandonApplicationEvent(2018));
        annotationConfigApplicationContext.publishEvent(new WandonApplicationEvent(Math.PI));
    }

    private static class WansonApplicationLister implements ApplicationListener<WandonApplicationEvent>{

        @Override
        public void onApplicationEvent(WandonApplicationEvent wandonApplicationEvent) {
            System.out.printf("WansonApplicationListener receives event source:%s\n\t\n",wandonApplicationEvent.getSource());
        }
    }

    private static class WandonApplicationEvent extends ApplicationEvent{

        public WandonApplicationEvent(Object source) {
            super(source);
        }
    }
}