dubbo實踐（一）搭建測試

最近在嘗試使用soa框架dubbo，記錄一些學習的過程，備忘。

這是一個開源項目，項目地址：https://github.com/alibaba/dubbo，中文文檔地址目前是：http://alibaba.github.io/dubbo-doc-static/Home-zh.htm

大概閱讀文檔之后，就開始動手嘗試了，主要是搭建一個基於zookeeper為注冊中心的例子，關於zookeeper的安裝，自行查找相關文檔。

 

1.新建一個maven項目dubboTest，修改pom文件，增加以下依賴

<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-context</artifactId>
	<version>3.2.5.RELEASE</version>
</dependency>

<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>dubbo</artifactId>
	<version>2.4.9</version>
</dependency>
    
<dependency>
	<groupId>org.apache.zookeeper</groupId>
	<artifactId>zookeeper</artifactId>
	<version>3.3.3</version>
	<exclusions>
		<exclusion>
		<groupId>com.sun.jmx</groupId>
		<artifactId>jmxri</artifactId>
		</exclusion>
		<exclusion>
		<groupId>com.sun.jdmk</groupId>
		<artifactId>jmxtools</artifactId>
		</exclusion>
		<exclusion>
		<groupId>javax.jms</groupId>
		<artifactId>jms</artifactId>
		</exclusion>
	</exclusions>
</dependency>

<dependency>
	<groupId>com.github.sgroschupf</groupId>
	<artifactId>zkclient</artifactId>
	<version>0.1</version>
</dependency>

<dependency>
	<groupId>com.netflix.curator</groupId>
	<artifactId>curator-framework</artifactId>
	<version>1.1.16</version>
</dependency>

 

　　

2.創建相關服務接口

新建一個DemoService接口

package com.alibaba.dubbo.demo;

public interface DemoService {
	
	String sayHello(String name);
}　　

 

 

3.實現相關服務

實現DemoService接口

package com.alibaba.dubbo.demo.provider;

import com.alibaba.dubbo.demo.DemoService;

public class DemoServiceImpl implements DemoService{

	public String sayHello(String name) {
		return "Hello " + name;
	}

}

　　

 

4.創建測試服務提供者和消費者

創建服務提供者：

package com.alibaba.dubbo.demo;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Provider {
 
    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"provider.xml"});
        context.start();
        System.out.println("請按任意鍵退出");
        System.in.read(); // 按任意鍵退出
    }
 
}

 

創建消費者

package com.alibaba.dubbo.demo;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
public class Consumer {
 
    public static void main(String[] args) throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"consumer.xml"});
        context.start();
 
        DemoService demoService = (DemoService)context.getBean("demoService"); // 獲取遠程服務代理
        String res = demoService.sayHello("world"); // 執行遠程方法
        System.out.println( res ); // 顯示調用結果
    }
 
}

 

 

5.通過xml文件來配置

在resources下創建provider.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
        ">
 
    <!-- 提供方應用信息，用於計算依賴關系 -->
    <dubbo:application name="dubbo-test-service"  />
 
    <!-- 使用multicast廣播注冊中心暴露服務地址 -->
   	<!--  <dubbo:registry address="multicast://224.5.6.7:1234" /> -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" client="zkclient" />
 
    <!-- 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.alibaba.dubbo.demo.DemoService" ref="demoService" />
 
    <!-- 和本地bean一樣實現服務 -->
    <bean id="demoService" class="com.alibaba.dubbo.demo.provider.DemoServiceImpl" />
    
</beans>

 

在resources下創建consumer.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，用於計算依賴關系，不是匹配條件，不要與提供方一樣 -->
    <dubbo:application name="dubbo-test-consumer"  />
 
    <!-- 使用multicast廣播注冊中心暴露發現服務地址 -->
  	<!--   <dubbo:registry address="multicast://224.5.6.7:1234" /> -->
     <dubbo:registry address="zookeeper://127.0.0.1:2181" />
 
    <!-- 生成遠程服務代理，可以和本地bean一樣使用demoService -->
    <dubbo:reference id="demoService" interface="com.alibaba.dubbo.demo.DemoService" />
    
</beans>

 

 

6.測試

先保證zookeeper已經啟動，在通過provider.java啟動服務，最后運行consumer.java來測試。測試輸出：

log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.
Hello world