dubbo 体验

      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

        

< 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

 

<? 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

/**
 *
 */
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

/**
 *
 */
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

< 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

<? 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

/**
 *
 */
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！