Dubbo+Zookeeper 入门Demo

1.Zookeeper安装及启动

　　可参考这篇文章https://www.cnblogs.com/geekdc/p/5948326.html

　　从下载到启动都描述的很详细，按照文章一步一步走即可。

2.Dubbo-admin搭建及启动

　　dubbo-admin的配置及启动推荐一篇文章https://blog.csdn.net/qq_28988969/article/details/79866111

1. Github(https://github.com/apache/incubator-dubbo/tree/dubbo-2.6.0)) 下载发现没有dubbo-admin

2. 在官网上下载dubbo-admin 2.6.0的Source Code(Zip) https://github.com/apache/incubator-dubbo/releases

   dubbo-admin的部署比较简单，可以打包放到Tomcat,也可以直接跑项目,我是直接导入Eclipse,步骤如下：

   2.1 修改WEB-INFO 下dubbo.properties文件

   dubbo.registry.address=zookeeper://127.0.0.1:2181
   dubbo.admin.root.password=root
   dubbo.admin.guest.password=guest

   2.2 在Tomcat中启动即可，查看控制中心，浏览器输入http://localhost:8888/dubbo-admin

3.创建provider注册dubbo服务

• pom依赖

  <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-web</artifactId>
          </dependency>
          <dependency>
              <groupId>io.dubbo.springboot</groupId>
              <artifactId>spring-boot-starter-dubbo</artifactId>
              <version>1.0.0</version>
          </dependency>
          <dependency>
              <groupId>org.projectlombok</groupId>
              <artifactId>lombok</artifactId>
              <scope>provided</scope>
          </dependency>
          <!--不加会抛异常，暂时不知道原理  -->
          <dependency>
              <groupId>log4j</groupId>
              <artifactId>log4j</artifactId>
              <version>1.2.17</version>
          </dependency>
  
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-test</artifactId>
              <scope>test</scope>
          </dependency>

• application.properties配置文件

  ## Dubbo 服务提供者配置
  spring.dubbo.application.name=provider
  spring.dubbo.registry.address=zookeeper://127.0.0.1:2181
  spring.dubbo.protocol.name=dubbo
  spring.dubbo.protocol.port=20880
  spring.dubbo.scan=com.wiaoong.provider

• 注册dubbo 服务

  //接口类
  public interface ICompanyDubboService {
      Company evaluateCompany(String company,String evaluation);
  }
  
  //实现类
  import com.alibaba.dubbo.config.annotation.Service;
  import com.wiaoong.provider.dubbo.ICompanyDubboService;
  import com.wiaoong.provider.entity.Company;
  
  /**
   * 注册dubbo服务
   * @author wiaoong
   * @date   2019.02.21 15:18
   */
  @Service
  public class CompanyDubboServiceImpl implements ICompanyDubboService {
      @Override
      public Company evaluateCompany(String company, String evaluation) {
          return new Company(company, evaluation);
      }
  }

• provider项目整体目录，直接启动项目会在buddo-admin看到已注册的服务

  

4.创建dubbo-comon,封装provider中注册的服务接口

1. • provider项目整体目录

   • 

5.创建consumer引用dubbo服务

1. • pom依赖同provider项目,另需引入步骤4生成的包dubbo-common.jar

   • application.properties配置

     ## 避免和 server 工程端口冲突
     server.port=8081
     
     ## Dubbo 服务消费者配置
     spring.dubbo.application.name=consumer
     spring.dubbo.registry.address=zookeeper://127.0.0.1:2181
     spring.dubbo.scan=com.wiaoong.consumer

   • 调用dubbo服务

     package com.wiaoong.consumer.dubbo;
     
     import org.springframework.scheduling.annotation.Scheduled;
     import org.springframework.stereotype.Service;
     
     import com.alibaba.dubbo.config.annotation.Reference;
     import com.wiaoong.provider.dubbo.ICompanyDubboService;
     
     /**
      * 调取dubbo服务
      * @author wiaoong
      * @date   2019.02.21 15:59
      */
     @Service
     public class CompanyDubboConsumerService {
     
         @Reference
         ICompanyDubboService companyDubboService;
     
         @Scheduled(fixedRate=5000)
         public void printStr() {
             System.err.println(companyDubboService.evaluateCompany("新博卓畅", "是一个骗子公司...是的..."));
         }
     }

   • consumer目录结构，直接启动项目，会在控制台打出所调用服务输出的结果

   • 

最后附上源码：https://gitee.com/wiaoong/studynotes.git