Spring 事件记录

⒈定义一个事件，继承 ApplicationEvent 接口。

package cn.coreqi.eventdemo.event;

import org.springframework.context.ApplicationEvent;

public class ProjectEvent extends ApplicationEvent {
    private String id;
    private String projectStatus;

    public String getId() {
        return id;
    }

    public String getProjectStatus() {
        return projectStatus;
    }

    public ProjectEvent(Object source, String id, String projectStatus){
        super(source);
        this.id = id;
        this.projectStatus = projectStatus;
    }
}

2.定义一个监听者，实现 ApplicationListener，以下二选其一，需要注意Spring的版本，以1为优先选项。

　　1.

package cn.coreqi.eventdemo.listener;

import cn.coreqi.eventdemo.event.ProjectEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;

@Component
public class ProjectListener implements ApplicationListener<ProjectEvent> {
    @Override
    public void onApplicationEvent(ProjectEvent event) {
        System.out.println("接收到的项目id: " + event.getId());
        System.out.println("接受到的项目类型: " + event.getProjectStatus());
        //开始业务处理
    }
}

　　2.

    @EventListener
    public void registerProjectEventListener(ProjectEvent event){
        System.out.println("这是第二种监听方式");
        System.out.println("接收到的项目id: " + event.getId());
        System.out.println("接受到的项目类型: " + event.getProjectStatus());
        //开始业务处理
    }

3.发布【这里是手动发布，一般是以quartz等任务框架去推动发布】

    public static void main(String[] args) {
        //SpringApplication.run(ApplicationMain.class, args);
        ConfigurableApplicationContext context = SpringApplication.run(ApplicationMain.class, args);
        context.publishEvent(new ProjectEvent(context,"7777","开始"));
    }

【可选】4.异步

package cn.coreqi.eventdemo.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.event.ApplicationEventMulticaster;
import org.springframework.context.event.SimpleApplicationEventMulticaster;
import org.springframework.core.task.SimpleAsyncTaskExecutor;

@Configuration
public class AsynchronousSpringEventsConfig {

    @Bean(name = "applicationEventMulticaster")
    public ApplicationEventMulticaster simpleApplicationEventMulticaster()
    {
        SimpleApplicationEventMulticaster eventMulticaster = new SimpleApplicationEventMulticaster();
        eventMulticaster.setTaskExecutor(new SimpleAsyncTaskExecutor());    //不是最优选择
        return eventMulticaster;
    }

}