Dubbo zookeeper 初探

原文地址：http://blog.csdn.net/wxwzy738/article/details/16330383

转：/article/11074844.html

建议参考资料：

/article/8504047.html

http://blog.csdn.net/goliathray/article/details/8565801

/content/2966869.html

/article/3877350.html

http://www.open-open.com/news/view/1442a5c

http://code.alibabatech.com/wiki/display/dubbo/Home

http://code.alibabatech.com/wiki/display/dubbo/User+Guide-zh

先把zookeeper在本地给安装好，
安装方法参考：/article/7578550.html

这里的话讲述了两个工程一个工程是提供服务的，一个工程是调用服务的，因为dubbo是跟spring进行无缝连接的，故功能配置在spring的配置文件中，跟spring进行整合开发

1、工程是以maven进行构建的，使用的jar包如下：



2、服务提供者的工程

a、dubbo-demo-api 定义接口

[java]
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public interface IProcessData {
public String deal(String data);
}

b、dubbo-demo-provider 服务提供者

[java]
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public class ProcessDataImpl implements IProcessData {

/*
* @see com.xxx.bubbo.provider.IProcessData#deal(java.lang.String)
*/
@Override
public String deal(String data) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "Finished:" + data;
}
}

c、applicationProvider.xml配置

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<?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 ">

<!-- Application name -->
<dubbo:application name="hello-world-app" />

<!-- registry address, used for service to register itself -->
<dubbo:registry address="zookeeper://127.0.0.1:2181" />

<!-- expose this service through dubbo protocol, through port 20880 -->
<!--
<dubbo:protocol name="dubbo" port="20880" />

<dubbo:protocol name="dubbo" port="9090" server="netty"
client="netty" codec="dubbo" serialization="hessian2" charset="UTF-8"
threadpool="fixed" threads="100" queues="0" iothreads="9" buffer="8192"
accepts="1000" payload="8388608" />
-->
<!-- Service interface Concurrent Control -->
<dubbo:service interface="com.huangjie.dubbo_Service.service.IProcessData"
ref="demoService" executes="10" />

<!-- Default Protocol -->
<!--
<dubbo:protocol server="netty" />
-->

<!-- designate implementation -->
<bean id="demoService" class="com.huangjie.dubbo_Service.service.impl.ProcessDataImpl" />

</beans>

d、启动服务

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

System.out.println("Press any key to exit.");
System.in.read();
}
}

3、服务调用者的工程
a、调用类

[java]
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public class ConsumerThd implements Runnable {

/*
* @see java.lang.Runnable#run()
*/
@Override
public void run() {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
new String[]{"applicationConsumer.xml"});
context.start();

IProcessData demoService = (IProcessData) context.getBean("demoService"); // get
// service
// invocation
// proxy
String hello = demoService.deal("nihao"); // do invoke!

System.out.println(Thread.currentThread().getName() + " "+hello);
}

public static void main(String[] args) {
new Thread(new ConsumerThd()).start();
/**
* 输出结果：
* Thread-0 Finished:nihao
*/
}
}

b、applicationConsumer.xml配置

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<?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 ">

<!-- consumer application name -->
<dubbo:application name="consumer-of-helloworld-app" />

<!-- registry address, used for consumer to discover services -->
<dubbo:registry address="zookeeper://127.0.0.1:2181" />
<dubbo:consumer timeout="5000"/>
<!-- which service to consume? -->
<dubbo:reference id="demoService" interface="com.huangjie.dubbo_Service.service.IProcessData" />
</beans>

4、最后需要把zookeeper的服务给启动，在zookeeper安装文件夹下面的bin目录里面的zkServer.cmd给点击运行。不要关闭窗口，保持服务运行



这样整个调用就完成了，这样的好处是只要远程提供ip地址及端口号，以及对外调用的类，客户端就可以调用，客户端不必知道服务端的地址之类的

而且服务端可以开多个zookeeper服务，这样如果其中一个zookeeper 服务死掉了，其他服务还能正常运行

工程下载路径：http://download.csdn.net/detail/wxwzy738/6553431