Dubbo zookeeper 初探

轉：http://blog.csdn.net/u011270461/article/details/12144623

建議參考資料：

http://blog.csdn.net/lin_fs/article/details/7395307

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

http://zy116494718.iteye.com/blog/1830138

http://agapple.iteye.com/blog/1292473

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在本地給安裝好，

安裝方法參考：http://blog.csdn.net/wxwzy738/article/details/16330253

這裏的話講述了兩個工程一個工程是提供服務的，一個工程是調用服務的，因爲dubbo是跟spring進行無縫連接的，故功能配置在spring的配置文件中，跟spring進行整合開發

1、工程是以maven進行構建的，使用的jar包如下：

2、服務提供者的工程

a、dubbo-demo-api  定義接口

public interface IProcessData {
    public String deal(String data);
}

b、dubbo-demo-provider 服務提供者

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

<?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、啓動服務

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、服務調用者的工程

a、調用類

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();
        /**
         * 輸出結果：
         * Thread-0 Finished:nihao
         */
    }
}

b、applicationConsumer.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
        ">

    <!-- 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、最後需要把zookeeper的服務給啓動，在zookeeper安裝文件夾下面的bin目錄裏面的zkServer.cmd給點擊運行。不要關閉窗口，保持服務運行

這樣整個調用就完成了，這樣的好處是隻要遠程提供ip地址及端口號，以及對外調用的類，客戶端就可以調用，客戶端不必知道服務端的地址之類的

而且服務端可以開多個zookeeper服務，這樣如果其中一個zookeeper 服務死掉了，其他服務還能正常運行

工程下載路徑：http://download.csdn.net/detail/wxwzy738/6553431