spring 使用@Async注解实现异步调用

1.先定义一个事件,该类继承 ApplicationEven的抽象类

import org.springframework.context.ApplicationEvent;


public class DemoTask extends ApplicationEvent {

    private String id;

    public OrgRegisterTask(Object source, Stringid) {
        super(source);
        this.id = id;
    }

    public String getId() {
        return id;
    }
}

2.定义一个监听者,时刻监听者发布者是否有发布任务。

import com.alibaba.fastjson.JSON;
import com.xxx.event.OrgRegisterTask;
import com.xxx.service.DemoService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.event.EventListener;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.stereotype.Component;


@Slf4j
@Component
@EnableAsync
public class DemoTaskHandler {

    @Autowired
    private DemoService demoService;

    @EventListener
    @Async
    public void demoHandler(DemoTask demoTask) {
     demoService.registerAccount(demoTask.getId());     
    }

}

3.事件发布

import javax.annotation.Resource;
import org.springframework.context.ApplicationEventPublisher;

@Component
public class DemoPubLisher {

   @Resource
    private ApplicationEventPublisher publisher;

   //事件发布方法
   public void pushListener(String id){
      publisher.publishEvent(new DemoTask(this,id));
   }

}

 

 

在类上,我们增加了注解@EnableAsync 表示开启异步@Async注解,不使用@EnableAsync注解,@Async是不会生效的；@Component 把bean注册到spring容器中；.在方法上我们使用了@EventListener（事件监听器）。