SpringCloud（第 038 篇）idea环境热部署微服务开发

摘要：添加简单用户微服务启动类简单用户微服务类支持热部署。

-

1、我们在开发过程中，会经常需要启动、停止微服务，而且有时候会比较频繁，需要不停的操作启停动作；
2、而我们本章节主要讲解下如何在开发环境中进行热部署，这样的话可以在一定程度上专心敲代码，两耳不闻窗外事，一心只想敲代码；

    4.0.0

    springms-simple-provider-user-devtools
    1.0-SNAPSHOT
    jar
    
    
        com.springms.cloud
        springms-spring-cloud
        1.0-SNAPSHOT
    
    
    
        
        
            org.springframework.boot
            spring-boot-starter-data-jpa
        

        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
        
            com.h2database
            h2
            runtime
        

        
        
            org.springframework.boot
            spring-boot-starter-data-solr
        

        
        
            org.springframework.boot
            spring-boot-devtools
            true
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
                
                    true
                
            
        
    

server:
  port: 8305
spring:
  application:
    name: springms-simple-provider-user-devtools  #全部小写
  jpa:
    generate-ddl: false
    show-sql: true
    hibernate:
      ddl-auto: none
  datasource:
    platform: h2
    schema: classpath:schema.sql
    data: classpath:data.sql
  thymeleaf:
    cache: false
logging:
  level:
    root: INFO
    org.hibernate: INFO
    org.hibernate.type.descriptor.sql.BasicBinder: TRACE
    org.hibernate.type.descriptor.sql.BasicExtractor: TRACE
    com.springms: DEBUG

drop table user if exists;

CREATE TABLE USER(
    id BIGINT GENERATED by default as identity,
    username VARCHAR(40),
    name VARCHAR(20),
    age int(3),
    balance DECIMAL(10, 2),
    PRIMARY KEY(id)
);

INSERT into user (id, username, name, age, balance) values (1, "user1", "张三", 20, 100.00);
INSERT into user (id, username, name, age, balance) values (2, "user2", "李四", 22, 100.00);
INSERT into user (id, username, name, age, balance) values (3, "user3", "王五", 24, 100.00);
INSERT into user (id, username, name, age, balance) values (4, "user4", "赵六", 26, 100.00);
INSERT into user (id, username, name, age, balance) values (5, "user5", "李逵", 27, 100.00);
INSERT into user (id, username, name, age, balance) values (6, "user6", "张远", 10, 100.00);
INSERT into user (id, username, name, age, balance) values (7, "user7", "迪拜", 60, 100.00);
INSERT into user (id, username, name, age, balance) values (8, "user8", "哈士奇", 40, 100.00);
INSERT into user (id, username, name, age, balance) values (9, "user9", "关羽", 30, 100.00);

package com.springms.cloud.repository;

import com.springms.cloud.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends JpaRepository {

}

package com.springms.cloud.entity;

import java.math.BigDecimal;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class User {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  private Long id;

  @Column
  private String username;

  @Column
  private String name;

  @Column
  private Short age;

  @Column
  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;
  }
}

package com.springms.cloud.controller;

import com.springms.cloud.entity.User;
import com.springms.cloud.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

/**
 * 用户微服务Controller（支持 idea 热部署）。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 17/10/18
 *
 */
@RestController
public class SimpleProviderUserDevtoolsController {

    @Autowired
    private UserRepository userRepository;

    @GetMapping("/simple/{id}")
    public User findById(@PathVariable Long id) {
        return this.userRepository.findOne(id);
    }

    @GetMapping("simple")
    public String simple() {
        return "simple-2017-09";
    }

    @GetMapping("simple2")
    public String simple2() {
        return "simple2-2017";
    }
}

package com.springms.cloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * 简单用户微服务类（支持 idea 热部署）。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 17/10/18
 *
 */
@SpringBootApplication
public class MsSimpleProviderUserDevtoolsApplication {

    public static void main(String[] args) {
        SpringApplication.run(MsSimpleProviderUserDevtoolsApplication.class, args);
        System.out.println("【【【【【【 简单用户微服务（热部署） 】】】】】】已启动.");
    }
}

/****************************************************************************************
 一、简单用户微服务接口测试：

 1、添加 spring-boot-devtools 热部署依赖；
 2、pom.xml 添加 true 属性；
 3、设置 idea 属性：“File” -> “Settings” -> “Build,Execution,Deplyment” -> “Compiler”，选中打勾 “Build project automatically” ；
 4、设置 idea 属性：组合键：“Shift+Ctrl+Alt+/” ，选择 “Registry” ，选中打勾 “compiler.automake.allow.when.app.running” ；
 5、设置缓存配置 spring.thymeleaf.cache=false；
 6、设置 chrome 属性：F12或者“Ctrl+Shift+I”，打开开发者工具，“Network” 选项卡下 选中打勾 “Disable Cache(while DevTools is open)” ；

 7、启动 springms-simple-provider-user-devtools 模块服务，启动1个端口；
 8、在浏览器输入地址 http://localhost:8305/simple 可以看到信息成功的被打印出来；

 9、改动 Controller 某个方法的返回值，或者新增方法，然后会看到控制台自动重启该应用，进行热部署；
 10、再在浏览器请求刚刚改动的链接，发现链接返回的内容确实动态改变过来了，这就是热部署；
 ****************************************************************************************/

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