服务主动下线offline

最新推荐文章于 2024-09-07 20:41:35 发布

布谷2015

最新推荐文章于 2024-09-07 20:41:35 发布

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本文链接：https://blog.youkuaiyun.com/qq_20601529/article/details/95981938

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本文介绍了在服务部署过程中，如何通过调用shutdown接口将服务实例状态设为Down，并使用delete请求立即从注册中心下线服务，以避免部署期间的请求异常问题。

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服务部署时，调用shutdown接口实例状态为Down，通过delete请求可以让注册中心即刻下线服务，减少服务部署时的请求异常情况。

package lewis.demo1.controller;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import lewis.demo1.common.utils.HttpUtils;
import lewis.demo1.common.utils.WebUtils;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;

@Slf4j
@RestController
@RequestMapping("/instance")
public class InstanceController {

    @Value("${spring.application.name}")
    private String springApplicationName;
    @Value("${eureka.client.service-url.defaultZone}")
    private String eurekaClientServiceUrlDefaultZone;

    @Autowired
    DiscoveryClient discoveryClient;

    @GetMapping("/offline")
    @ResponseBody
    public InstanceModel offline(){
        InstanceModel model = new InstanceModel();

		try {
	        List<String> offlineUrlList = getInstanceAddress(springApplicationName, "instanceId");
	        for (String offlineUrl:offlineUrlList) {
	            HttpUtils.doDelete(offlineUrl);
	        }
	        List<String> zuulNotifyUrlList = getInstanceAddress("ZUUL", "homePageUrl");
	        for (String zuulNotifyUrl:zuulNotifyUrlList) {
	            HttpUtils.doPost(zuulNotifyUrl);
	        }
	        model.setStatus("0000");
	        model.setMessage("服务下线成功");
	        model.setSuccess(true);
        } catch (Exception e) {
	        model.setStatus("9999");
	        model.setMessage("服务下线失败");
	        model.setSuccess(false);
			log.error(e.getMessage(), e);
		}

        model.setTimestamp(System.currentTimeMillis());
        return model;
    }

    private List<String> getInstanceAddress(String springApplicationName, String urlType){
        List<String> instanceAddressList = new ArrayList<>();
        List<ServiceInstance> serviceInstanceList = discoveryClient.getInstances(springApplicationName);
        try {
            String host = WebUtils.getLinuxLocalIp();
            log.debug("LOCAL IP:"+host);
            log.debug(JSONObject.toJSONString(serviceInstanceList));
            for (ServiceInstance serviceInstance : serviceInstanceList) {
                JSONObject jsonObject = JSON.parseObject(JSONObject.toJSONString(serviceInstance));
                if (serviceInstance.getHost().equals(host)) {
                    String url = jsonObject.getJSONObject("instanceInfo").getString(urlType);
                    if ("instanceId".equalsIgnoreCase(urlType)) {
                        String[] defaultZones = eurekaClientServiceUrlDefaultZone.split(",");
                        for (String zone:defaultZones) {
                            instanceAddressList.add(zone + "apps/" + springApplicationName + "/" + url);
                        }
                    } else if ("homePageUrl".equalsIgnoreCase(urlType)) {
                        instanceAddressList.add(url + "actuator/shutdown");
                    }
                }
            }
        } catch (Exception e){
            log.error(e.getMessage(), e);
        }
        return instanceAddressList;
    }


    @Data
    @NoArgsConstructor
    class InstanceModel {
        private String status;
        private String message;
        private boolean isSuccess;
        private Long timestamp;
    }

}