第一章 第一个dubbo项目

1 package com.alibaba.dubbo.demo;
2 
3 public interface DemoService {
4     String sayHello(String name);
5 }

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3        xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
 4        xmlns="http://www.springframework.org/schema/beans"
 5        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
 6        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
 7 
 8     <!-- 提供方应用信息，用于计算依赖关系 -->
 9     <dubbo:application name="demo-provider"/>
10 
11     <!-- 使用zookeeper注册中心，并使用curator客户端 -->
12     <dubbo:registry protocol="zookeeper" address="10.211.55.5:2181" client="curator"/>
13 
14     <!-- 使用dubbo协议在20880端口暴露服务 -->
15     <dubbo:protocol name="dubbo" port="20880"/>
16 
17     <!-- 和本地bean一样实现服务 -->
18     <bean id="demoService" class="com.alibaba.dubbo.demo.provider.DemoServiceImpl"/>
19 
20     <!-- 声明需要暴露的服务接口 -->
21     <dubbo:service interface="com.alibaba.dubbo.demo.DemoService" ref="demoService"/>
22 </beans>

 1 package com.alibaba.dubbo.demo.provider;
 2 
 3 import com.alibaba.dubbo.demo.DemoService;
 4 import com.alibaba.dubbo.rpc.RpcContext;
 5 
 6 import java.text.SimpleDateFormat;
 7 import java.util.Date;
 8 
 9 public class DemoServiceImpl implements DemoService {
10     public String sayHello(String name) {
11         System.out.println("[" + new SimpleDateFormat("HH:mm:ss").format(new Date()) + "] Hello " + name + ", request from consumer: " + RpcContext.getContext().getRemoteAddress());
12         return "Hello " + name + ", response form provider: " + RpcContext.getContext().getLocalAddress();
13     }
14 }

 1 package com.alibaba.dubbo.demo.provider;
 2 
 3 import org.springframework.context.support.ClassPathXmlApplicationContext;
 4 
 5 public class Provider {
 6     public static void main(String[] args) throws Exception {
 7         ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"META-INF/spring/dubbo-demo-provider.xml"});
 8         context.start();
 9 
10         System.in.read(); // 按任意键退出
11     }
12 }

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3        xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
 4        xmlns="http://www.springframework.org/schema/beans"
 5        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
 6        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
 7 
 8     <!-- 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 -->
 9     <dubbo:application name="demo-consumer"/>
10 
11     <!-- 使用zookeeper注册中心，并使用curator客户端 -->
12     <dubbo:registry protocol="zookeeper" address="10.211.55.5:2181" client="curator"/>
13 
14     <!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
15     <dubbo:reference id="demoService" check="false" interface="com.alibaba.dubbo.demo.DemoService"/>
16 </beans>

 1 package com.alibaba.dubbo.demo.consumer;
 2 
 3 import com.alibaba.dubbo.demo.DemoService;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 
 6 public class Consumer {
 7     public static void main(String[] args) {
 8         ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"META-INF/spring/dubbo-demo-consumer.xml"});
 9         context.start();
10 
11         DemoService demoService = (DemoService) context.getBean("demoService"); // 获取远程服务代理
12         String hello = demoService.sayHello("world"); // 执行远程方法
13 
14         System.out.println(hello); // 显示调用结果
15     }
16 }