dubbo入门示例1

1、用户指南

https://pan.baidu.com/s/1UrZO_qeRczX1nKgJROue4Q

核心概念：

2、example示例

2.1 dubboprovider代码

SampleServiceImpl:该service提供两个方法分别为sayHello和getUsers

package bhz.dubbo.sample.provider.impl;

import java.util.ArrayList;
import java.util.List;

import bhz.dubbo.sample.provider.SampleService;

public class SampleServiceImpl implements SampleService {
	
	public String sayHello(String name) {
		return "Hello " + name;
	}

	public List getUsers() {
		List list = new ArrayList();
		User u1 = new User();
		u1.setName("jack");
		u1.setAge(20);
		u1.setSex("m");

		User u2 = new User();
		u2.setName("tom");
		u2.setAge(21);
		u2.setSex("m");

		User u3 = new User();
		u3.setName("rose");
		u3.setAge(19);
		u3.setSex("w");

		list.add(u1);
		list.add(u2);
		list.add(u3);
		return list;
	}
}

provider启动测试类：

package bhz.dubbo.sample.test;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Provider {

	public static void main(String[] args) throws Exception {
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
				new String[] { "sample-provider.xml" });
		context.start(); 
		System.in.read(); // 为保证服务一直开着，利用输入流的阻塞来模拟
	}
}

sample-provider.xml配置文件

<?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="sampleService" class="bhz.dubbo.sample.provider.impl.SampleServiceImpl" />

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

	<!-- 使用zookeeper注册中心暴露服务地址 -->
	<dubbo:registry address="zookeeper://192.168.56.129:2181" />

	<!-- 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  写操作可以设置retries=0 避免重复调用SOA服务 -->
	<dubbo:service retries="0" interface="bhz.dubbo.sample.provider.SampleService" ref="sampleService" />

</beans>

2.2 dubboconsumer代码

sample-consumer.xml配置文件

<?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="sample-consumer" />

	<dubbo:registry address="zookeeper://192.168.56.129:2181" />

	<!-- 生成远程服务代理，可以像使用本地bean一样使用demoService 检查级联依赖关系 默认为true 当有依赖服务的时候，需要根据需求进行设置 -->
	<dubbo:reference id="sampleService" check="false"
		interface="bhz.dubbo.sample.provider.SampleService" />

</beans>

测试方法：

package bhz.dubbo.sample.test;

import java.util.List;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import bhz.dubbo.sample.provider.SampleService;

public class Consumer {

	public static void main(String[] args) throws Exception {
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
				new String[] { "sample-consumer.xml" });
		context.start();
			
		SampleService sampleService = (SampleService) context.getBean("sampleService");
		String hello = sampleService.sayHello("tom");
		System.out.println(hello);
		
//		List list = sampleService.getUsers();
//		if (list != null && list.size() > 0) {
//			for (int i = 0; i < list.size(); i++) {
//				System.out.println(list.get(i));
//			}
//		}
		System.in.read();
	}

}

3、启动服务，查看服务调用关系