dubbo 的使用

jopen 10年前發布 | 30K 次閱讀 Dubbo WEB服務/RPC/SOA

Dubbo是[3] 阿里巴巴公司開源的一個高性能優秀的服務框架，使得應用可通過高性能的 RPC 實現服務的輸

出和輸入功能，可以和 [4] Spring框架無縫集成。

主要核心部件

Remoting: 網絡通信框架，實現了 sync-over-async 和 request-response 消息機制.

RPC: 一個遠程過程調用的抽象，支持負載均衡、容災和集群功能

Registry: 服務目錄框架用于服務的注冊和服務事件發布和訂閱

工作原理

dubbo 的使用

Provider

暴露服務方稱之為“服務提供者”。

Consumer

調用遠程服務方稱之為“服務消費者”。

Registry

服務注冊與發現的中心目錄服務稱之為“服務注冊中心”。

Monitor

統計服務的調用次數和調用時間的日志服務稱之為“服務監控中心”。

(1) 連通性：

注冊中心負責服務地址的注冊與查找，相當于目錄服務，服務提供者和消費者只在啟動時與注冊中心交互，注冊中心不轉發請求，壓力較小

監控中心負責統計各服務調用次數，調用時間等，統計先在內存匯總后每分鐘一次發送到監控中心服務器，并以報表展示

服務提供者向注冊中心注冊其提供的服務，并匯報調用時間到監控中心，此時間不包含網絡開銷

服務消費者向注冊中心獲取服務提供者地址列表，并根據負載算法直接調用提供者，同時匯報調用時間到監控中心，此時間包含網絡開銷

注冊中心，服務提供者，服務消費者三者之間均為長連接，監控中心除外

注冊中心通過長連接感知服務提供者的存在，服務提供者宕機，注冊中心將立即推送事件通知消費者

注冊中心和監控中心全部宕機，不影響已運行的提供者和消費者，消費者在本地緩存了提供者列表

注冊中心和監控中心都是可選的，服務消費者可以直連服務提供者

(2) 健狀性：

監控中心宕掉不影響使用，只是丟失部分采樣數據

數據庫宕掉后，注冊中心仍能通過緩存提供服務列表查詢，但不能注冊新服務

注冊中心對等集群，任意一臺宕掉后，將自動切換到另一臺

注冊中心全部宕掉后，服務提供者和服務消費者仍能通過本地緩存通訊

服務提供者無狀態，任意一臺宕掉后，不影響使用

服務提供者全部宕掉后，服務消費者應用將無法使用，并無限次重連等待服務提供者恢復

(3) 伸縮性：

注冊中心為對等集群，可動態增加機器部署實例，所有客戶端將自動發現新的注冊中心

服務提供者無狀態，可動態增加機器部署實例，注冊中心將推送新的服務提供者信息給消費者

以下是需要的ZooKeeper 安裝，和管理頁面的安裝，測試的提供者和消費者。

所需的文件下載地址：http://download.csdn.net/detail/liuc0317/8314333

1. 我在windows 下安裝的zooKeeper ，所下載的文件 zookeeper-3.3.6.tar.gz 解壓到一個文件夾下。如圖

dubbo 的使用

目錄如圖：

dubbo 的使用

進入conf 修改配置文件 zoo.cfg

# The number of milliseconds of each tick  心跳間隔 毫秒每次  
tickTime=2000  
# The number of ticks that the initial  
# synchronization phase can take  
initLimit=10  
# The number of ticks that can pass between  
# sending a request and getting anacknowledgement  
syncLimit=5  
# the directory where the snapshot isstored.  //鏡像數據位置  
dataDir=D:\\data\\zookeeper  
#日志位置  
dataLogDir=D:\\logs\\zookeeper  
# the port at which the clients willconnect  客戶端連接的端口  
clientPort=2181

修改了配置文件dataLogDir 的配置，這個配置地址需要人為的去創建，要不然會報錯。這樣，配置就基本完成了。

第二步：進入bin 目錄，然后在 dos 下運行。

這樣 zookeeper 就啟動了，同時可以使用zookeeper 自帶的客戶端查看一下。如圖：

編寫服務的提供者和消費者如圖：

dubbo 的使用

DemoService.java

package com.unj.dubbotest.provider;  

import java.util.List;  

public interface DemoService {  

    String sayHello(String name);  

    public List getUsers();  

}

DemoServiceImp.java

package com.unj.dubbotest.provider.impl;  

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

import com.unj.dubbotest.provider.DemoService;  

public class DemoServiceImpl implements DemoService {  

    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;  
    }  
}

applicationContext.xml

<?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  
        ">  

    <!-- 具體的實現bean -->  
    <bean id="demoService" class="com.unj.dubbotest.provider.impl.DemoServiceImpl" />  

    <!-- 提供方應用信息，用于計算依賴關系 -->  
    <dubbo:application name="xixi_provider" />  

    <!-- 使用multicast廣播注冊中心暴露服務地址 <dubbo:registry address="multicast://224.5.6.7:1234"   
        /> -->  

    <!-- 使用zookeeper注冊中心暴露服務地址 -->  
    <dubbo:registry address="zookeeper://10.20.5.106:2181" />  

    <!-- 用dubbo協議在20880端口暴露服務 -->  
    <dubbo:protocol name="dubbo" port="20880" />  

    <!-- 聲明需要暴露的服務接口 -->  
    <dubbo:service interface="com.unj.dubbotest.provider.DemoService"  
        ref="demoService" />  

</beans>

Provider.java

package com.unj.dubbotest.provider.impl;  

import org.springframework.context.support.ClassPathXmlApplicationContext;  

public class Provider {  

    public static void main(String[] args) throws Exception {  
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(  
                new String[] { "applicationContext.xml" });  
        context.start();  
        System.in.read(); // 為保證服務一直開著，利用輸入流的阻塞來模擬  
    }  
}

運行main 方法：日志如下：

2014-12-30 15:45:46,349 INFO [org.springframework.context.support.ClassPathXmlApplicationContext] 
- Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@dd87b2: display name 
[org.springframework.context.support.ClassPathXmlApplicationContext@dd87b2]; 
startup date [Tue Dec 30 15:45:46 CST 2014]; root of context hierarchy  
2014-12-30 15:45:46,410 INFO [org.springframework.beans.factory.xml.XmlBeanDefinitionReader] 
- Loading XML bean definitions from class path resource [applicationContext.xml]  
2014-12-30 15:45:46,554 INFO [com.alibaba.dubbo.common.logger.LoggerFactory] 
- using logger: com.alibaba.dubbo.common.logger.log4j.Log4jLoggerAdapter  
2014-12-30 15:45:46,585 INFO [org.springframework.context.support.ClassPathXmlApplicationContext]
 - Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@dd87b2]: 
org.springframework.beans.factory.support.DefaultListableBeanFactory@1319c  
2014-12-30 15:45:46,831 INFO [org.springframework.beans.factory.support.DefaultListableBeanFactory]
 - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1319c: defining beans
 [demoService,xixi_provider,com.alibaba.dubbo.config.RegistryConfig,dubbo,
com.unj.dubbotest.provider.DemoService]; root of factory hierarchy  
2014-12-30 15:45:46,834 INFO [com.alibaba.dubbo.config.AbstractConfig] 
-  [DUBBO] The service ready on spring started. service: 
com.unj.dubbotest.provider.DemoService, dubbo version: 2.5.2, current host: 127.0.0.1  
2014-12-30 15:45:46,992 INFO [com.alibaba.dubbo.config.AbstractConfig] 
-  [DUBBO] Export dubbo service com.unj.dubbotest.provider.DemoService to local registry,
 dubbo version: 2.5.2, current host: 127.0.0.1  
2014-12-30 15:45:46,992 INFO [com.alibaba.dubbo.config.AbstractConfig] 
-  [DUBBO] Export dubbo service com.unj.dubbotest.provider.DemoService to url
 dubbo://10.20.5.106:20880/com.unj.dubbotest.provider.DemoService?anyhost=true&application
=xixi_provider&dubbo=2.5.2&interface=com.unj.dubbotest.provider.DemoService&methods
=sayHello,getUsers&pid=12192&side=provider×tamp=1419925546891, dubbo version: 2.5.2, 
current host: 127.0.0.1  2014-12-30 15:45:46,992 INFO [com.alibaba.dubbo.config.AbstractConfig] 
-  [DUBBO] Register dubbo service com.unj.dubbotest.provider.DemoService url
 dubbo://10.20.5.106:20880/com.unj.dubbotest.provider.DemoService?anyhost
=true&application=xixi_provider&dubbo=2.5.2&interface=com.unj.dubbotest.provider.DemoService&methods
=sayHello,getUsers&pid=12192&side=provider×tamp=1419925546891 to 
registry registry://10.20.5.106:2181/com.alibaba.dubbo.registry.RegistryService?application
=xixi_provider&dubbo=2.5.2&pid=12192&registry=zookeeper×tamp=1419925546845, 
dubbo version: 2.5.2, current host: 127.0.0.1  
2014-12-30 15:45:47,161 INFO [com.alibaba.dubbo.remoting.transport.AbstractServer] 
-  [DUBBO] Start NettyServer bind /0.0.0.0:20880, export /10.20.5.106:20880,
 dubbo version: 2.5.2, current host: 127.0.0.1  
2014-12-30 15:45:47,183 INFO [com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry] 
-  [DUBBO] Load registry store file C:\Users\lenovo\.dubbo\dubbo-registry-10.20.5.106.cache,
 data: {com.unj.dubbotest.provider.DemoService
=empty://10.20.5.106/com.unj.dubbotest.provider.DemoService?application
=hehe_consumer&category=providers&dubbo
=2.5.2&interface=com.unj.dubbotest.provider.DemoService&methods
=sayHello,getUsers&pid=21892&side=consumer×tamp
=1419925451328 empty://10.20.5.106/com.unj.dubbotest.provider.DemoService?application
=hehe_consumer&category=configurators&dubbo=2.5.2&interface
=com.unj.dubbotest.provider.DemoService&methods=sayHello,getUsers&pid
=21892&side=consumer×tamp
=1419925451328 empty://10.20.5.106/com.unj.dubbotest.provider.DemoService?application
=hehe_consumer&category=routers&dubbo
=2.5.2&interface=com.unj.dubbotest.provider.DemoService&methods
=sayHello,getUsers&pid=21892&side
=consumer×tamp=1419925451328}, dubbo version: 2.5.2, current host: 127.0.0.1  
2014-12-30 15:45:47,198 INFO [org.I0Itec.zkclient.ZkEventThread] 
- Starting ZkClient event thread.  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] 
- Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] 
- Client environment:host.name=10.20.5.106  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] 
- Client environment:java.version=1.6.0_30  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] 
- Client environment:java.vendor=Sun Microsystems Inc.  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] 
- Client environment:java.home=D:\soft\UCFSOFTDOC\soft\JDK\Java_JDK1.6_32bit\Java\jdk1.6.0_30\jre  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper]
- Client environment:java.class.path
=C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\classes;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\commons-lang-2.3.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\commons-logging-1.1.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\commons-logging-api-1.1.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\dubbo-2.5.2.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\dubbo-admin-2.5.2-sources.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\dubbo-demo-consumer-2.5.2-sources.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\dubbo-demo-provider-2.5.2-sources.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\dubbo-registry-simple-2.5.2-sources.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\javassist-3.4.GA.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\jline-0.9.94.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\netty-3.2.2.Final.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\netty-3.2.5.Final.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-aop.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-beans.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-context-support.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-context.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-core.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-jdbc.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-jms.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-orm.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-test.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-tx.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-web.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-webmvc-portlet.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-webmvc-struts.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring-webmvc.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\spring.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\zkclient-0.1.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\zookeeper-3.4.5.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\log4j-1.2.12.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\slf4j-api-1.6.1.jar;
C:\Users\lenovo\Downloads\provider\dubboprovider\WebRoot\WEB-INF\lib\slf4j-log4j12-1.6.1.jar  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] 
- Client environment:java.library.path=D:\soft\UCFSOFTDOC\soft\JDK\Java_JDK1.6_32bit\Java\jdk1.6.0_30\bin;
C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;
C:/Program Files (x86)/Java/jre7/bin/client;
C:/Program Files (x86)/Java/jre7/bin;C:/Program Files (x86)/Java/jre7/lib/i386;
C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;
C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;
C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Intel\OpenCL SDK\3.0\bin\x86;
C:\Program Files (x86)\Intel\OpenCL SDK\3.0\bin\x64;
C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;
C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;
C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;
C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;
D:\soft\UCFSOFTDOC\soft\JDK\Java_JDK1.6_32bit\Java\jdk1.6.0_30\bin;
D:\Program Files\TortoiseSVN\bin;
D:\soft\UCFSOFTDOC\soft\Maven\apache-maven-3.1.1_20140127\apache-maven-3.1.1\bin;
C:\Program Files (x86)\OpenV*N\bin;D:\soft\UCFSOFTDOC\soft\IDE\eclipse_JAVAEE;;.  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] 
- Client environment:java.io.tmpdir=C:\Users\lenovo\AppData\Local\Temp\  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper]
- Client environment:java.compiler=<NA>  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] - Client environment:os.name=Windows 7  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] - Client environment:os.arch=x86  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] - Client environment:os.version=6.1  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] - Client environment:user.name=lenovo  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] - Client environment:user.home=C:\Users\lenovo  
2014-12-30 15:45:47,217 INFO [org.apache.zookeeper.ZooKeeper] - Client environment:user.dir=
C:\Users\lenovo\Downloads\provider\dubboprovider  
2014-12-30 15:45:47,218 INFO [org.apache.zookeeper.ZooKeeper] 
- Initiating client connection, connectString=10.20.5.106:2181 sessionTimeout
=30000 watcher=org.I0Itec.zkclient.ZkClient@2acc57  
2014-12-30 15:45:47,239 INFO [org.apache.zookeeper.ClientCnxn] 
- Opening socket connection to server 10.20.5.106/10.20.5.106:2181. Will 
not attempt to authenticate using SASL (無法定位登錄配置)  
2014-12-30 15:45:47,240 INFO [org.apache.zookeeper.ClientCnxn] 
- Socket connection established to 10.20.5.106/10.20.5.106:2181, initiating session  
2014-12-30 15:45:47,306 WARN [org.apache.zookeeper.ClientCnxnSocket] 
- Connected to an old server; r-o mode will be unavailable  
2014-12-30 15:45:47,306 INFO [org.apache.zookeeper.ClientCnxn] 
- Session establishment complete on server 10.20.5.106/10.20.5.106:2181, 
sessionid = 0x14a9a27ba100000, negotiated timeout = 30000  
2014-12-30 15:45:47,309 INFO [org.I0Itec.zkclient.ZkClient] 
- zookeeper state changed (SyncConnected)  
2014-12-30 15:45:47,312 INFO [com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry] 
-  [DUBBO] Register: dubbo://10.20.5.106:20880/com.unj.dubbotest.provider.DemoService?anyhost=true&application
=xixi_provider&dubbo=2.5.2&interface=com.unj.dubbotest.provider.DemoService&methods
=sayHello,getUsers&pid=12192&side=provider×tamp=1419925546891, dubbo version: 2.5.2, current host: 127.0.0.1  
2014-12-30 15:45:47,446 INFO [com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry] 
-  [DUBBO] Subscribe: provider://10.20.5.106:20880/com.unj.dubbotest.provider.DemoService?anyhost=true&application
=xixi_provider&category=configurators?=false&dubbo=2.5.2&interface
=com.unj.dubbotest.provider.DemoService&methods=sayHello,getUsers&pid
=12192&side=provider×tamp=1419925546891, dubbo version: 2.5.2, current host: 127.0.0.1  
2014-12-30 15:45:47,559 INFO [com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry] 
-  [DUBBO] Notify urls for subscribe url provider://10.20.5.106:20880/com.unj.dubbotest.provider.DemoService?anyhost
=true&application=xixi_provider&category=configurators?=false&dubbo=2.5.2&interface
=com.unj.dubbotest.provider.DemoService&methods=sayHello,getUsers&pid=12192&side
=provider×tamp=1419925546891, urls: [empty://10.20.5.106:20880/com.unj.dubbotest.provider.DemoService?anyhost
=true&application=xixi_provider&category=configurators?=false&dubbo=2.5.2&interface
=com.unj.dubbotest.provider.DemoService&methods=sayHello,getUsers&pid=12192&side
=provider×tamp=1419925546891], dubbo version: 2.5.2, current host: 127.0.0.1

這樣就在 zookeeper 的控制頁面中就會查詢到此服務如圖：

編寫服務的消費者項目如圖：

dubbo 的使用

DemoService.java 這個服務提供者提供的服務類，在實際開發中，需要提供者把這個類，打成一個jar 包提供給調用者。

package com.unj.dubbotest.provider;  

import java.util.List;  

public interface DemoService {  

    String sayHello(String name);  

    public List getUsers();  

}

Consumer.java

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();  

        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();  
    }  

}

applicationContext.xml

<?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  
        ">  

    <!-- 消費方應用名，用于計算依賴關系，不是匹配條件，不要與提供方一樣 -->  
    <dubbo:application name="hehe_consumer" />  

    <!-- 使用zookeeper注冊中心暴露服務地址 -->  
    <!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> -->  
    <dubbo:registry address="zookeeper://10.20.5.106:2181" />  

    <!-- 生成遠程服務代理，可以像使用本地bean一樣使用demoService -->  
    <dubbo:reference id="demoService"    interface="com.unj.dubbotest.provider.DemoService" />  

</beans>

運行的結果：

dubbo 的使用

這樣就調用完了。

原文 http://www.uml.org.cn/zjjs/201512281.asp

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