dubbo 初体验

我的原文地址 http://www.inspires.cn/note/27

 上一家公司使用阿里巴巴的Dubbo做SOA的基础框架，并在其上做集成，由于之前环境都是架构师搭建的，所以我还不是很了解，只是会用，前几天心血来潮自己搭建了一个helloworld版，这里记录一下搭建过程。

         第一步，要选择dubbo的中间件，之前用的是zookeeper来做注册中心的，所以我这边也使用它来搭建注册中心，下载地址去apache的官网下载，可以戳我直接去到官网下载稳定版本。而后解压到本地文件夹，解压出来的结构如下

打开conf文件夹，copy zoo_sample.cfg副本，重命名为zoo.cfg,然后可以修改里面的内容，也可以不修改。

打开bin目录下的zkServer.cmd文件，如果报错，请设置好环境变量。

 

正常启动如下

注册中心就弄好了，

         第二步，创建service工程与其中的服务，本案例使用maven构建系统，怎么创建maven系统这边就不做赘述了，主要上下其中的代码

pom.xml

        

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< project  xmlns = "http://maven.apache.org/POM/4.0.0"  xmlns:xsi="    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 >              < groupId >com.inspires</ groupId >           < artifactId >dubbo-service</ artifactId >           < version >0.0.1-SNAPSHOT</ version >           < packaging >jar</ packaging >              < name >dubbo-service</ name >           < url >http://maven.apache.org</ url >              < properties >                     < project.build.sourceEncoding >UTF-8</ project.build.sourceEncoding >           </ properties >           < dependencies >                               < dependency >                              < groupId >junit</ groupId >                              < artifactId >junit</ artifactId >                              < version >4.12</ version >                     </ dependency >                        < dependency >                              < groupId >org.springframework</ groupId >                              < artifactId >spring-context</ artifactId >                              < version >3.2.5.RELEASE</ version >                     </ dependency >                        < dependency >                              < groupId >com.alibaba</ groupId >                              < artifactId >dubbo</ artifactId >                              < version >2.4.9</ version >                     </ dependency >                        < dependency >                              < groupId >org.apache.zookeeper</ groupId >                              < artifactId >zookeeper</ artifactId >                              < version >3.4.6</ version >                     </ dependency >                     < dependency >                              < groupId >com.101tec</ groupId >                              < artifactId >zkclient</ artifactId >                              < version >0.4</ version >                     </ dependency >           </ dependencies > </ project >

然后创建一个spring的配置文件命名为service-dubbo.xml

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<? xml  version = "1.0"  encoding = "UTF-8" ?> < beans  xmlns = "http://www.springframework.org/schema/beans"  xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"  xmlns:dubbo = "http://code.alibabatech.com/schema/dubbo"           xsi:schemaLocation="http://www.springframework.org/schema/beans          http://www.springframework.org/schema/beans/spring-beans.xsd          http://code.alibabatech.com/schema/dubbo          http://code.alibabatech.com/schema/dubbo/dubbo.xsd">           <!-- 提供方应用信息，用于计算依赖关系 -->           < dubbo:application  name = "service-test-dubbo" />           <!-- 使用multicast广播注册中心暴露服务地址 -->           < dubbo:registry  address = "zookeeper://127.0.0.1:2181"  />           <!-- 用dubbo协议在20880端口暴露服务 -->           < dubbo:protocol  name = "dubbo"  port = "20880"  />           <!-- 声明需要暴露的服务接口 -->           < dubbo:service  interface = "com.inspires.dubbo.service.IDemoService"  ref = "demoService"  />           <!-- 和本地bean一样实现服务 -->           < bean  id = "demoService"  class = "com.inspires.dubbo.service.impl.DemoService"  /> </ beans >

接下来创建一个接口与实现类IDemoService、DemoService,只创建一个sayHello方法以做校验

IDemoService.java

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/**   *   */ package  com.inspires.dubbo.service;    /**   * @author Jon Chiang   * @project dubbo-service   * @create_date 2014-12-30 下午5:06:52   */ public  interface  IDemoService {              /**             * @author Jon Chiang             * @create_date 2014-12-30 下午5:09:27             * @param name             * @return             */           String sayHello(String name); }

DemoService.java 不多说

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/**   *   */ package  com.inspires.dubbo.service.impl;    import  com.inspires.dubbo.service.IDemoService;    /**   * @author Jon Chiang   * @project dubbo-service   * @create_date 2014-12-30 下午5:07:29   */ public  class  DemoService  implements  IDemoService {           static  int  sayHelloCount =  0 ;           @Override           public  String sayHello(String name) {                     String hello =  "Hello "  + name;                     System.out.println(++sayHelloCount);                     System.out.println(hello);                     return  hello;           } }

还有web.xml里面要做spring配置文件和监听的配置，这里不做赘述（附件里面有，不会的同事可以参考附件）这里service工程基本弄好了

第三步，创建maven的访问者或者客户端工程。

pom.xml 注意要引用service工程，不然没法访问IDemoService了

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< 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/maven-v4_0_0.xsd" >           < modelVersion >4.0.0</ modelVersion >           < groupId >com.inspires</ groupId >           < artifactId >dubbo-client</ artifactId >           < packaging >war</ packaging >           < version >0.0.1-SNAPSHOT</ version >           < name >dubbo-client Maven Webapp</ name >           < url >http://maven.apache.org</ url >              < build >                     < finalName >dubbo-client</ finalName >           </ build >           < dependencies >                     < dependency >                              < groupId >junit</ groupId >                              < artifactId >junit</ artifactId >                              < version >4.12</ version >                     </ dependency >                        < dependency >                              < groupId >org.springframework</ groupId >                              < artifactId >spring-context</ artifactId >                              < version >3.2.5.RELEASE</ version >                     </ dependency >                        < dependency >                              < groupId >com.alibaba</ groupId >                              < artifactId >dubbo</ artifactId >                              < version >2.4.9</ version >                     </ dependency >                        < dependency >                              < groupId >org.apache.zookeeper</ groupId >                              < artifactId >zookeeper</ artifactId >                              < version >3.4.6</ version >                     </ dependency >                     < dependency >                              < groupId >com.101tec</ groupId >                              < artifactId >zkclient</ artifactId >                              < version >0.4</ version >                     </ dependency >                     < dependency >                              < groupId >com.inspires</ groupId >                              < artifactId >dubbo-service</ artifactId >                              < version >0.0.1-SNAPSHOT</ version >                     </ dependency >           </ dependencies > </ project >

然后就是spring文件

client-dubbo.xml

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<? xml  version = "1.0"  encoding = "UTF-8" ?> < beans  xmlns = "http://www.springframework.org/schema/beans"         xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"         xmlns:dubbo = "http://code.alibabatech.com/schema/dubbo"         xsi:schemaLocation="http://www.springframework.org/schema/beans          http://www.springframework.org/schema/beans/spring-beans.xsd          http://code.alibabatech.com/schema/dubbo          http://code.alibabatech.com/schema/dubbo/dubbo.xsd          ">      <!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->      < dubbo:application  name = "client-test-dubbo" />        <!-- 使用zookeeper广播注册中心暴露发现服务地址 -->      < dubbo:registry  address = "zookeeper://127.0.0.1:2181"  />          <!-- 生成远程服务代理，可以和本地bean一样使用demoService -->      < dubbo:reference  id = "demoService"  interface = "com.inspires.dubbo.service.IDemoService"  /> </ beans > client-common.xml <? xml  version = "1.0"  encoding = "UTF-8" ?> < beans  xmlns = "http://www.springframework.org/schema/beans"           xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"  xmlns:context = "http://www.springframework.org/schema/context"           xmlns:tx = "http://www.springframework.org/schema/tx"  xmlns:util = "http://www.springframework.org/schema/util"           xsi:schemaLocation="http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-3.2.xsd           http://www.springframework.org/schema/util           http://www.springframework.org/schema/util/spring-util-3.2.xsd       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd                     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd"           default-lazy-init = "false" >           < context:annotation-config  />           < context:component-scan  base-package = "com.inspires.dubbo.service"  />   <!-- 自动扫描所有注解该路径 --> </ beans >

让后我们在service里面写一个测试调用远程接口的方法。因为我这边只是测试接口是否通，所以使用@PostConstruct注解，让工程一启动就调用init方法访问接口，达到我测试的目的。

TestService.java

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/**   *   */ package  com.inspires.dubbo.service.impl;    import  javax.annotation.PostConstruct;    import  org.springframework.beans.factory.annotation.Autowired; import  org.springframework.stereotype.Service;    import  com.inspires.dubbo.service.IDemoService; import  com.inspires.dubbo.service.ITestService;    /**   * @author Jon Chiang   * @project dubbo-client   * @create_date 2014-12-30 下午6:54:12   */ @Service public  class  TestService  implements  ITestService{              @Autowired           IDemoService demoService;                     @PostConstruct           @Override           public  void  init(){                     for  ( int  i =  0 ; i <  20 ; i++) {                              demoService.sayHello( "Jon Chiang " );                     }                               } }

然后可以开测了

启动service工程控制台无异常，然后启动client工程，系统调用远程方法。控制台答应hello Jon  Chiang 大功告成也！

附件为工程文件 戳我 下载