dubbo

dubbo入门实例
准备工作
1.下载zookeeper
2.解压进入conf文件夹添加zoo.cfg文件，内容为zoo_simple.cfg文件内容
3.启动zookeeper


写一个基本的user类
package com.unj.dubbotest.provider.impl;
import java.io.Serializable;
public class User implements Serializable {
private static final long serialVersionUID = 1L;
private int age;
private String name;


public int getAge() {
return age;
}


public void setAge(int age) {
this.age = age;
}


public String getName() {
return name;
}


public void setName(String name) {
this.name = name;
}
}


定义接口
package dubbo.provider;


import java.util.List;


public interface DemoService {


String sayHello(String name);


public List getUsers();


}


接口实现类
package provider.impl;


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


import dubbo.provider.DemoService;


public class DemoServiceImpl implements DemoService {


public String sayHello(String name) {
System.out.println("=============================================");
return "Hello " + name;
}


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


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


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


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


服务提供者的xml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="demoService" class="provider.impl.DemoServiceImpl" />


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


<!-- 使用multicast广播注册中心暴露服务地址 <dubbo:registry address="multicast://224.5.6.7:1234" 
/> -->


<!-- 使用zookeeper注册中心暴露服务地址 -->
<dubbo:registry address="zookeeper://10.63.36.28:2180" />
<!-- <dubbo:registry address="zookeeper://10.63.36.28:2181?backup=10.63.36.28:2182,10.63.36.28:2183" /> -->
<!-- <dubbo:registry address="127.0.0.1:9090" register="false" /> -->


<!-- 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="dubbo.provider.DemoService" ref="demoService" />



</beans>


在引用方定义接口
package dubbot.provider;


import java.util.List;


public interface DemoService {


String sayHello(String name);


public List getUsers();


}


服务消费方xml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="tt_consumer" />


<!-- 使用zookeeper注册中心暴露服务地址 -->
<!-- 如果使用本地则不需要此配置 -->
<!-- 单机 -->
<dubbo:registry address="zookeeper://10.63.36.28:2180" />
<!-- 多台服务器 -->
<!-- <dubbo:registry -->
<!-- address="zookeeper://10.63.36.28:2181?backup=10.63.36.28:2182,10.63.36.28:2183" /> -->


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

<!-- 本地配置 -->
<!-- <dubbo:reference id="demoService" -->
<!-- interface="dubbotest.provider.DemoService" check="false" -->
<!-- url="127.0.0.1:20880" /> -->


</beans>


服务消费方测试代码
package com.alibaba.dubbo.demo.pp;


import java.util.List;


import org.springframework.context.support.ClassPathXmlApplicationContext;


import com.unj.dubbotest.provider.DemoService;


public class Consumer {


public static void main(String[] args) throws Exception {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
new String[] { "applicationContext.xml" });
context.start();
System.out.println(">>>>>>>>>>>>>>>>>>>>>>>");
System.out.println(context);
System.out.println(">>>>>>>>>>>>>>>>>>>>>>>");
DemoService demoService = (DemoService) context.getBean("demoService");
String hello = demoService.sayHello("tom");
System.out.println(hello);


List list = demoService.getUsers();
if (list != null && list.size() > 0) {
for (int i = 0; i < list.size(); i++) {
System.out.println(list.get(i));
}
}
System.in.read();
}
}


注意：

在新建接口的时候接口要完全相同，路径也要相同否则会找不到对应的service(郁闷了半天)

需要的jar包

commons-logging-1.1.jar
dubbo-2.5.2.jar
javassist-3.4.GA.jar
netty-3.2.5.Final.jar
spring-beans.jar
spring-context.jar
spring-core.jar
zookeeper-3.4.5.jar
zkclient-0.1.jar
slf4j-api-1.6.1.jar
slf4j-log4j12-1.6.1.jar
log4j-1.2.12.jar