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
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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-moviesrcmainresourcesapplication.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-moviesrcmainjavacomspringmscloudentityUser.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-moviesrcmainjavacomspringmscloudcontrollerMovieController.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-moviesrcmainjavacomspringmscloudMsConsumerMovieApplication.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;
****************************************************************************************/
四、下载地址
https://gitee.com/ylimhhmily/SpringCloudTutorial.git
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