使用Dubbo实现RPC简单示例02

简单的Dubbo RPC调用描述如下:
dubbo-arch

复杂的Dubbo RPC调用描述如下:
dubbo-arch-ext

在这里我们先用zookeeper来做registry,做一个简单的例子:

一、首先是zookeeper:
1、到zookeeper进行下载
2、解压
3、拷贝conf/zoo_sample.cfg到conf/zoo.cfg,然后按需要修改配置
4、双击bin/zkServer.cmd

二、然后是接口定义,服务端和接口端都会用到,最好打一个jar包,防止错误修改:
IJustATest.java

package com.neohope.dubbo.test;

public interface IJustATest {
    public String SayHelloTo(String name);
    public int Add(int a, int b);
}

三、再就是服务端实现:
1、新建java程序,添加mvn功能,引用dubbo-x.x.x.jar

2、服务实现类MyDubboService.java

package com.neohope.dubbo.test;

public class MyDubboService implements IJustATest{

    public String SayHelloTo(String name) {
        return "Hello " + name;
    }

    public int Add(int a, int b) {
        return a+b;
    }
}

3、服务注册
ServceTest.java

package com.neohope.dubbo.test;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ServceTest {
    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"applicationContext.xml"});
        context.start();

        System.in.read();
    }
}

4、spring配置

<?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
            ">

    <!-- 具体的实现bean -->
    <bean id="myDubboService" class="com.neohope.dubbo.test.MyDubboService" />

    <!-- 提供方应用信息,用于计算依赖关系 -->
    <dubbo:application name="neo_service_provider"  />

    <!-- 使用zookeeper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.neohope.dubbo.test.IJustATest" ref="myDubboService" />

</beans>

5、编译运行

四、最后是客户端实现:
1、新建java程序,添加mvn功能,引用dubbo-x.x.x.jar

2、服务调用
ServceTest.java

package com.neohope.dubbo.test;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ClientTest {
    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml"});
        context.start();

        IJustATest proxy = (IJustATest) context.getBean("myDubboService");
        System.out.println(proxy.SayHelloTo("neohope")) ;
        System.out.println(proxy.Add(1,2)) ;

        System.in.read();
    }
}

3、spring配置

<?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="neo_service_consumer" />

    <!-- 使用zookeeper注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />

    <!-- 生成远程服务代理,可以像使用本地bean一样使用demoService -->
    <dubbo:reference id="myDubboService" interface="com.neohope.dubbo.test.IJustATest" />

</beans>

4、编译运行

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