服务中心Eureka

痛定思痛。 2021-12-22 07:35 263阅读 0赞

# 一、服务消费者-注册服务中心 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 1]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 2]

## 测试结果 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 3]

# 二、消费者通过Eureka访问提供者 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 5]  
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## 测试结果 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 7]

# Consumer #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 8]

## ConsumerController ##

package com.william.controller;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.cloud.client.ServiceInstance;
    import org.springframework.cloud.client.discovery.DiscoveryClient;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    import javax.annotation.Resource;
    import java.util.List;
    
    /**
     * @author ：lijunxuan
     * @date ：Created in 2019/6/29  9:54
     * @description ：
     * @version: 1.0
     */
    @RestController
    @RequestMapping("/consumer")
    public class ConsumerController {
         @Resource
        RestTemplate restTemplate;
         @Resource
         DiscoveryClient discoveryClient;  //发现客户端对象
         @RequestMapping("/findUser")
        public String findUser(Integer id){
             //请求服务提供者的查询用户详情地址
             // String url="http://localhost:9091/user/findById?id="+id;alt+enter  找到format
            String url= String.format("http://localhost:9091/user/findById?id=%d", id);
            /*
            * 动态获取服务注册中心的，服务提供者地址*/
             /**
              * 操作快捷键
              *   找到privider_service-> application.yml->   user-service   先复制  然后按住crtl +e  回到这个位置
              *   discoveryClient.getInstances("user-service")     ctrl +alt +v  和.var的效果相同
              *    List<ServiceInstance> instances = discoveryClient.getInstances("user-service");
              */
             //获取注册中心的所有user-service用户注册实例
             List<ServiceInstance> instances = discoveryClient.getInstances("user-service");
             //获取第一个实例
             ServiceInstance serviceInstance = instances.get(0);
             int port = serviceInstance.getPort();
             String host = serviceInstance.getHost();
             url= String.format("http://%s:%d/user/findById?id=%d", host, port, id);
    
             return restTemplate.getForObject(url,String.class);
         }
    
    }

## 测试断点 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 9]

## 服务续约 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 10]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 11]

## 失效剔除和自我保护 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzM5MTc5OTkz_size_16_color_FFFFFF_t_70 12]

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