Dubbo介绍1- Hello World例子

介绍

dubbo是阿里巴巴的开源RPC框架。阿里巴巴Dubbo实现的源码分析 这篇文章介绍的挺好的。对应的主页是 http://code.alibabatech.com/wiki/display/dubbo/Home  。看dubbo主要是想学习一下对应的ClassLoader的隔离机制。不过所有技术都总HelloWorld开始，那就mark一下吧。

 

正文

我是通过zk做服务集群管理的。所以如果要跑下面这个程序，需要自己搭一个zk集群 

对应的接口

 

package demo.service;

/**
 * User: zhenghui
 * Date: 14-1-13
 * Time: 上午10:40
 */
public interface DemoService {
    public void sayHello();
}

 实现类

package demo.service;

/**
 * User: zhenghui
 * Date: 14-1-13
 * Time: 上午10:41
 */
public class DemoServiceImpl implements DemoService {
    @Override
    public void sayHello() {
        System.out.println("hello 00!");
    }
}

 

provider.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
        ">
    <dubbo:application name="hello-world-app" />
    <dubbo:registry  protocol="zookeeper" address="10.125.195.174:2181" />
    <dubbo:protocol name="dubbo" port="20880" />
    <dubbo:service interface="demo.service.DemoService"
                   ref="demoService" />       <!-- 和本地bean一样实现服务 -->
    <bean id="demoService" class="demo.service.DemoServiceImpl" />
</beans>

 

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * User: zhenghui
 * Date: 14-1-13
 * Time: 下午1:54
 */
public class DubboProviderDemo {

    public static void main(String[] args) throws InterruptedException {

        new ClassPathXmlApplicationContext(
                new String[] {"demo/provider.xml"});
        while (true){}

    }
}

 

comsumer 

<?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="consumer-of-helloworld-app" />       <!-- 使用multicast广播注册中心暴露发现服务地址 -->
    <dubbo:registry  protocol="zookeeper" address="10.125.195.174:2181" />         <!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
    <dubbo:reference id="demoService" interface="demo.service.DemoService" />
</beans>

 

import demo.service.DemoService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * User: zhenghui
 * Date: 14-1-13
 * Time: 下午1:54
 */
public class DubboComsumeDemo {

    public static void main(String[] args) throws InterruptedException {

        ApplicationContext factory = new ClassPathXmlApplicationContext(
                new String[] {"demo/comsumer.xml"});

        DemoService demoService = (DemoService) factory.getBean("demoService");
        demoService.sayHello();

    }
}

 

先运行 DubboProviderDemo 然后再运行DubboComsumeDemo ，然后就可以看到在DubboProviderDemo的console中打印 “hello 00!”

 

后面我会继续介绍dubbo，计划下一篇内容是它是如何启动provider的。