dubbo使用例子

dubbo2.4.11源码编译 http://my.oschina.net/penngo/blog/494838

同样以两个简单的登录和注册服务为例，之前已经用thrift实现过，thrift版本的实现请参考Thrift的java和php http://my.oschina.net/penngo/blog/489311

客户端和服务器端共用接口类

登录接口类

package com.penngo.dubbo.service;

public interface LoginService {
	public User login(String name, String psw);

}

注册接口类

package com.penngo.dubbo.service;

public interface RegisterService {
	 public User createUser(String name, String psw);
}

服务器端

登录接口实现

package com.penngo.dubbo.serviceimpl;
import com.penngo.dubbo.service.LoginService;
import com.penngo.dubbo.service.User;

public class LoginServiceImpl implements LoginService{
	public User login(String name, String psw){
        User user = null;
        if(name.equals("penngo") && psw.equals("123")){
            user = new User();
            user.setId(1);
            user.setName("penngo");
        }
        return user;
    }
}

注册接口实现

package com.penngo.dubbo.serviceimpl;
import com.penngo.dubbo.service.RegisterService;
import com.penngo.dubbo.service.User;

public class RegisterServiceImpl implements RegisterService{
	 public User createUser(String name, String psw){
	        User user = new User();
	        user.setId(2);
	        user.setName(name);
	        user.setPassword(psw);
	        return user;
	    }
}

服务器端利用spring发布服务dubbo-penngo-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-2.5.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="provider-penngo-app"  />
 
    <!-- 使用zookeeper广播注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />
    <!--  <dubbo:registry address="multicast://224.5.6.7:1234" />   -->
 
    <!-- 用dubbo协议在20880端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20880" />

    <!-- 和本地bean一样实现服务 -->
	<bean id="loginService" class="com.penngo.dubbo.serviceimpl.LoginServiceImpl" />
	<bean id="registerService" class="com.penngo.dubbo.serviceimpl.RegisterServiceImpl" />

	<!-- 声明需要暴露的服务接口 -->
	<dubbo:service interface="com.penngo.dubbo.service.LoginService" ref="loginService" />
	<dubbo:service interface="com.penngo.dubbo.service.RegisterService" ref="registerService" />

</beans>

服务启动类，发布服务

package com.penngo.dubbo.server;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Server {
	public static void main(String[] args) throws Exception{
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"dubbo-penngo-provider.xml"});
        context.start();
        System.in.read(); // 按任意键退出
	}
}

客户端调用服务很简单，只需一个xml文件和一个java调用类

客户端利用spring配置可用远程服务器

<?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-2.5.xsd
	http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <dubbo:application name="consumer-penngo-app"  />

    <dubbo:registry address="zookeeper://127.0.0.1:2181" />
    <!-- 使用multicast广播注册中心暴露发现服务地址 -->
    <!--   <dubbo:registry address="multicast://224.5.6.7:1234" />  -->
    
    <!-- 生成远程服务代理， -->
	<dubbo:reference id="loginService" interface="com.penngo.dubbo.service.LoginService" />
	<dubbo:reference id="registerService" interface="com.penngo.dubbo.service.RegisterService" />
</beans>

客户端调用

package com.penngo.dubbo.client;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.penngo.dubbo.service.LoginService;
import com.penngo.dubbo.service.RegisterService;
import com.penngo.dubbo.service.User;

public class Client {
	 public static void main(String[] args) throws Exception {
	        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"dubbo-penngo-consumer.xml"});
	        context.start();
	 
	        LoginService loginService = (LoginService)context.getBean("loginService"); // 获取远程服务代理
	        User user = loginService.login("penngo", "123");
	 
	        System.out.println( user.getId() + " " + user.getName()); // 显示调用结果
	        
	        RegisterService registerService = (RegisterService)context.getBean("registerService");
	        User user2 = registerService.createUser("penngo", "123");
	        System.out.println( user2.getId() + " " + user2.getName()); // 显示调用结果
	    }
}

源码稍后提供下载