SpringCloud(第 005 篇)电影微服务,也注册到 EurekaServer 中,通过 Http 协议访问已注册到生态圈中的用户微服务
一、大致介绍
1、在 eureka 服务治理框架中,微服务与微服务之间通过 Http 协议进行通信;
2、用户微服务作为消费方、电影微服务作为提供方都注册到 EurekaServer 中;
3、在电影微服务Web层通过 application.yml 的硬编码配置方式实现服务之间的通信;
二、实现步骤
2.1 添加 maven 引用包
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><artifactId>springms-consumer-movie</artifactId><version>1.0-SNAPSHOT</version><packaging>jar</packaging><parent><groupId>com.springms.cloud</groupId><artifactId>springms-spring-cloud</artifactId><version>1.0-SNAPSHOT</version></parent><dependencies><!-- web模块 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- 监控和管理生产环境的模块 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!-- 客户端发现模块 --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-eureka</artifactId></dependency></dependencies></project>
2.2 添加应用配置文件(springms-consumer-movie\src\main\resources\application.yml)
spring:application:name: springms-consumer-movie
server:port: 7901
user: userServicePath: http://localhost:7900/simple/
eureka:client:
# healthcheck:
# enabled: trueserviceUrl:defaultZone: http://admin:admin@localhost:8761/eurekainstance:prefer-ip-address: trueinstance-id: ${spring.application.name}:${spring.cloud.client.ipAddress}:${spring.application.instance_id:${server.port}}
2.3 添加实体用户类User(springms-consumer-movie\src\main\java\com\springms\cloud\entity\User.java)
package com.springms.cloud.entity;import java.math.BigDecimal;public class User {private Long id;private String username;private String name;private Short age;private BigDecimal balance;public Long getId() {return this.id;}public void setId(Long id) {this.id = id;}public String getUsername() {return this.username;}public void setUsername(String username) {this.username = username;}public String getName() {return this.name;}public void setName(String name) {this.name = name;}public Short getAge() {return this.age;}public void setAge(Short age) {this.age = age;}public BigDecimal getBalance() {return this.balance;}public void setBalance(BigDecimal balance) {this.balance = balance;}}
2.4 添加电影Web访问层Controller(springms-consumer-movie\src\main\java\com\springms\cloud\controller\MovieController.java)
package com.springms.cloud.controller;import com.springms.cloud.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;@RestController
public class MovieController {@Autowiredprivate RestTemplate restTemplate;@Value("${user.userServicePath}")private String userServicePath;@GetMapping("/movie/{id}")public User findById(@PathVariable Long id) {return this.restTemplate.getForObject(this.userServicePath + id, User.class);}
}
2.5 添加电影微服务启动类(springms-consumer-movie\src\main\java\com\springms\cloud\MsConsumerMovieApplication.java)
package com.springms.cloud;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;/*** 电影微服务,也注册到 EurekaServer 中,通过 Http 协议访问已注册到生态圈中的用户微服务。** @author hmilyylimh** @version 0.0.1** @date 2017/9/17**/
@SpringBootApplication
@EnableEurekaClient
public class MsConsumerMovieApplication {@Beanpublic RestTemplate restTemplate(){return new RestTemplate();}public static void main(String[] args) {SpringApplication.run(MsConsumerMovieApplication.class, args);System.out.println("【【【【【【 电影微服务 】】】】】】已启动.");}
}
三、测试
/****************************************************************************************一、电影微服务,也注册到 EurekaServer 中,通过 Http 协议访问已注册到生态圈中的用户微服务:1、启动 springms-discovery-eureka 模块服务,启动1个端口;2、启动 springms-provider-user 模块服务,启动1个端口;3、启动 springms-consumer-movie 模块服务,启动1个端口;4、在浏览器输入地址 http://localhost:7900/simple/1 可以看到信息成功的被打印出来,说明用户微服务正常;5、在浏览器输入地址 http://localhost:8761 并输入用户名密码 admin/admin 进入Eureka微服务显示在网页中,验证用户微服务、电影微服务确实注册到了 eureka 服务中;6、在浏览器输入地址http://localhost:7901/movie/1 可以看到用户信息成功的被打印出来;****************************************************************************************/