SpringBoot 官方文档示例：(5)通过Listener获取应用的Availability状态

amadeus_liu2

已于 2022-04-11 15:27:02 修改

阅读量565

点赞数

分类专栏： SpringBoot 文章标签： spring boot

于 2022-04-11 15:18:05 首次发布

本文链接：https://blog.youkuaiyun.com/amadeus_liu2/article/details/124100039

版权

SpringBoot 专栏收录该内容

246 篇文章

订阅专栏

1.创建listener类：

package cn.edu.tju.component;

import org.springframework.boot.availability.AvailabilityChangeEvent;
import org.springframework.boot.availability.LivenessState;
import org.springframework.context.event.EventListener;
import org.springframework.stereotype.Component;

@Component
public class MyAvailabilityStateExporter {
    @EventListener
    public void onStateChange(AvailabilityChangeEvent<LivenessState> event) {
        switch (event.getState()) {
            case CORRECT:
                System.out.println("correct......");
                break;
            case  BROKEN:
                System.out.println("broken......");
                break;
        }
    }
}

2.触发应用的availability状态改变

package cn.edu.tju.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.availability.AvailabilityChangeEvent;
import org.springframework.boot.availability.LivenessState;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class LivenessController {
    @Autowired
    ApplicationEventPublisher applicationEventPublisher;

    @RequestMapping("/live")
    public String test(){
        AvailabilityChangeEvent.publish(applicationEventPublisher,new NullPointerException("info"),
                LivenessState.BROKEN);
        return "ok";
    }
}