1、提供方配置文件:

server:
  port: 8001
dubbo:
  application:
    name: site-service-boot-provider
  registry:
    address: zookeeper://ubu:2181
  scan:
    base-packages: com.yas.serviceprovider
  #指定某一种协议
  protocol:
    name: dubbo
    port: 20882

 

2、提供方代码:

 1 package com.yas.serviceprovider.timeout;
 2 
 3 import com.yas.api.SiteService;
 4 import org.apache.dubbo.config.annotation.Service;
 5 //1.如果服务端设置了timeout,而客户端没有设置,表示客户端采用服务端一样的timeout
 6 //2.如果服务端的实际执行时间比设置的timeout要长,那么会打印超时日志,但服务会正常执行
 7 @Service(version = "timeout",timeout = 4000)
 8 public class TimeoutSiteServiceImpl implements SiteService {
 9     @Override
10     public String getName(String name) {
11         try {
12             Thread.sleep(5000);
13         } catch (InterruptedException e) {
14             e.printStackTrace();
15         }
16         return "timeout:"+name;
17     }
18 }

 

3、接口层新增一个stub类:

这里用到了代理模式。

这个类必须和SiteService接口放在同一个包下(约定)。

 1 package com.yas.api;
 2 
 3 public class SiteServiceStub implements SiteService {
 4     private SiteService siteService;
 5 
 6     public SiteServiceStub(SiteService siteService){
 7         this.siteService = siteService;
 8     }
 9 
10     @Override
11     public String getName(String name) {
12         try{
13             return this.siteService.getName(name);
14         }catch (Exception e){
15             return "stub:"+name;
16         }
17     }
18 }

 

4、消费方代码:

package com.yas.serviceconsumer.controller;

import com.yas.api.SiteService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TimeoutController {
    //客户端未设置timeout,服务端也未设置timeout,则默认为1000毫秒超时
    //客户端未设置timeout,服务端设置了timeout,则客户端以服务端设置为准
    //如果客户端timeout的时间到了,服务端还没有返回数据,则抛出异常
    //如果客户端timeout到之前,已经从服务端获取了响应,则正常执行


    @Reference(version = "timeout",timeout = 2000,stub = "true")
    SiteService siteService;

    @RequestMapping("/timeout")
    public String getName(@RequestParam("name") String name){
        return siteService.getName(name);
    }
}

 

5、测试:

使用postman请求地址:http://localhost:8000/timeout?name=zhangsan

结果如下:stub:zhangsan

 

posted on 2021-11-04 13:23  Sempron2800+  阅读(116)  评论(0编辑  收藏  举报