dubbo 体验

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dubbo 体验

浩宇天尚 2016-05-26 10:36:48 浏览1158 评论1

摘要:  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。

 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IDemoServiceDemoService,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

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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!

 

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