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SpringCloud(第 005 篇)电影微服务,也注册到 E

SpringCloud(第 005 篇)电影微服务,也注册到 E

作者: HMILYYLIMH | 来源:发表于2017-09-17 11:45 被阅读61次

    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: true
        serviceUrl:
          defaultZone: http://admin:admin@localhost:8761/eureka
      instance:
        prefer-ip-address: true
        instance-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 {
    
        @Autowired
        private 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 {
    
    	@Bean
    	public 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;
     ****************************************************************************************/
    

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