Spring Cloud implements simple movie microservices

SpringCloud (Chapter 002) Simple Movie Microservice Class (Consumer, and Provider is User Microservice)

1. General introduction

Microservices communicate with each other through the Http protocol; 
user microservices act as providers, movie microservices act as consumers, and movie microservices consume user microservices;

2. Implementation steps

2.1 Add maven reference package

<?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-simple-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>
    </dependencies>

</project>

2.2 Add application configuration file (springms-simple-consumer-movie\src\main\resources\application.yml)

spring:
  application:
    name: springms-simple-consumer-movie  #全部小写
server:
  port: 8005
user: 
  userServicePath: http://localhost:8000/simple/

2.3 Add entity user class User (springms-simple-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 Add Movie Web Access Layer Controller (springms-simple-consumer-movie\src\main\java\com\springms\cloud\controller\MsSimpleConsumerMovieController.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;

/**
 * 电影微服务Controller。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/9/17
 *
 */
@RestController
public class MsSimpleConsumerMovieController {

    @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 Add a simple movie microservice startup class (springms-simple-consumer-movie\src\main\java\com\springms\cloud\MsSimpleConsumerMovieApplication.java)

package com.springms.cloud; 

import org.springframework.boot.SpringApplication; 
import org.springframework.boot.autoconfigure.SpringBootApplication; 
import org.springframework.context.annotation.Bean; 
import org.springframework.web.client.RestTemplate; 

/ ** 
 * Simple movie microservice (consumer, and provider is user microservice). 
 * 
 * @author hmilyylimh 
 * 
 * @version 0.0.1 
 * 
 * @date 2017/9/17 
 * 
 */ 
@SpringBootApplication 
public class MsSimpleConsumerMovieApplication { 

    @Bean 
    public RestTemplate restTemplate() { 
        return new RestTemplate(); 
    }
 
    public static void main( String[] args) {
        SpringApplication.run(MsSimpleConsumerMovieApplication.class, args); 
      System.out.println("[[[[[[Simple Movie Microservice]]]]]] started."); 
    } 
}

3. Test

/**************************************************** ***************************************** 
 1. Simple movie micro-services (consumers, And the provider is user microservice): 

 1. Start the springms-simple-provider-user module service and start 1 port; 
 2. Start the springms-simple-consumer-movie module service and start 1 port; 
 3. In the browser Enter the address http://localhost:8005/movie/1 and you can see that the information is successfully printed out; 
 *************************** ***************************************************** *************/