Eureka 客户端服务注册 与 消费

Posted 2022-02-20 shaoxin

pom中添加依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>$spring-cloud.version</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

application.yml

#优雅退出配置
management:
  endpoint:
    shutdown:
      enabled: true
  endpoints:
    web:
      exposure:
        include:
          - shutdown
          - info
          - health
spring:
  application:
    name: eureka-provider
server:
  port: 9090
#服务注册
eureka:
  client:
    service-url:
      defaultZone: http://eureka:[email protected]:8761/eureka,http://eureka2:8761/eureka

SpringCloudEurekaClientApplication.java 启动类加注解

package com.example.springcloudeurekaclient;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@EnableEurekaClient
@SpringBootApplication
public class SpringCloudEurekaClientApplication 

    public static void main(String[] args) 
        SpringApplication.run(SpringCloudEurekaClientApplication.class, args);
    

 消费注册表中服务：

    @Autowired
    private LoadBalancerClient loadBalancerClient;

    public List<User> getUser()
        //选择调用服务的名称
        ServiceInstance serviceInstance = loadBalancerClient.choose("eureka-provider");
        //拼接访问服务的URL
        StringBuffer sb = new StringBuffer();
        sb.append("http://").append(serviceInstance.getHost()).append(":")
                .append(serviceInstance.getPort()).append("/getUser");
        //restTemplate请求模板
        RestTemplate restTemplate = new RestTemplate();

        ParameterizedTypeReference<List<User>> typeReference = new ParameterizedTypeReference<List<User>>() ;
        //封裝返回值信息
        ResponseEntity<List<User>> responseEntity = restTemplate.exchange(sb.toString(), HttpMethod.GET, null, typeReference);
        List<User> body = responseEntity.getBody();
        return body;