springboot-zookeeper-dubbo 整合

springboot-zookeeper-dubbo

1. 建议maven项目，pom.xml加上相应依赖

   	<parent>
           <groupId>org.springframework.bootgroupId>
           <artifactId>spring-boot-starter-parentartifactId>
           <version>2.3.3.RELEASEversion>
           <relativePath/> 
       parent>
   	<properties>
           <java.version>1.8java.version>
       properties>
       <dependencies>
           <dependency>
               <groupId>org.springframework.bootgroupId>
               <artifactId>spring-boot-starterartifactId>
           dependency>
           <dependency>
               <groupId>org.springframework.bootgroupId>
               <artifactId>spring-boot-starter-webartifactId>
               <scope>compilescope>
           dependency>
           
           <dependency>
               <groupId>org.apache.dubbogroupId>
               <artifactId>dubbo-spring-boot-starterartifactId>
               <version>2.7.8version>
           dependency>
           <dependency>
               <groupId>org.apache.curatorgroupId>
               <artifactId>curator-recipesartifactId>
               <version>2.13.0version>
           dependency>
           <dependency>
               <groupId>org.apache.zookeepergroupId>
               <artifactId>zookeeperartifactId>
               <version>3.4.13version>
               <type>pomtype>
           dependency>
       dependencies>
   

2. 建立一个Module 专门存放Consumer和provider 公用元素，可取名xxx-base模板，存放共同的接口和工具类等

3. 建立Consumer对应的Module和Provider对应的Module，两者都引用base Module

   	<dependencies>
           <dependency>
               <groupId>com.baoyonggroupId>
               <artifactId>dubbo-baseartifactId>
               <version>${project.parent.version}version>
           dependency>
       dependencies>
   

4. 安装zookeeper，下载个压缩包本地解压修改一下conf/zoo.cfg即可，启动zk；

   1. 消费者 application配置：

      #Dubbo configuration
      dubbo.application.name=dubbo_consumer
      dubbo.registry.protocol=zookeeper
      dubbo.registry.address=zookeeper://127.0.0.1:2181
      # 注解中引用此版本，之后消费者可通过配置该参数实现动态切换引用的生产者
      dubbo.provider.version=2.0
      

   2. 生产者application配置：

      ## dubbo 配置
      dubbo.application.name=dubbo_provider
      dubbo.registry.protocol=zookeeper
      dubbo.registry.address=zookeeper://127.0.0.1:2181
      dubbo.protocol.name=dubbo
      dubbo.protocol.port=20880
      # 扫描注解包通过该设置将服务注册到zookeeper
      dubbo.scan.base-packages=com.baoyong.provider.service.impl
      

5. 接口实现及调用：

   1. 在base的项目中定义接口 如 TestService。

   2. 在provider项目中实现base定义的接口，TestServiceImpl，注意引用注解：

      @DubboService(interfaceClass = TestService.class, interfaceName = "testServiceImplProvider", version = "${dubbo.provider.version}")
      public class TestServiceImpl implements TestService {
               
      	...
      }
      

      此处的实现类在bean容器中的id为 testServiceImpl

   3. 在consumer项目中引用provider的服务：

      @DubboReference(version = "${dubbo.provider.version}")
      private com.baoyong.base.service.TestService testService;
      

6. 可配置不同version的provider，然后修改consumer调用provider的version即可切换不同版本调用。