使用maven集成Dubbo
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dubbo
maven
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Maven
原文 http://blog.csdn.net/gemuandyou/article/details/50763653
最近项目要使用Dubbo来实现微服务，简单来说就是将你写好的服务用在其它模块中，当然是同一个业务流程中的多个模块。
使用的开发工具是IntelliJ IDEA。需要的库是zookeeper。
准备工作是这个样子的。New Project -> Maven -> Create from archetype (maven-archetype-webapp) -> 项目名为DubboDemo。
完成后，新建一个module。在DubboDemo项目上右键， New -> Module -> Maven -> Create from archetype (maven-archetype-webapp) -> 模块名为DubboService。
同样的步骤，再新建一个名为DubboConsumer的模块。
在DubboService和DubboConsumer的pom.xml文件中加入依赖包。
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.gemugroupId>
<artifactId>dubbo-demoartifactId>
<packaging>pompackaging>
<version>1.0-SNAPSHOTversion>
<modules>
<module>DubboServicemodule>
<module>DubboConsumermodule>
modules>
<name>dubbo-demo Maven Webappname>
<url>http://maven.apache.orgurl>
<dependencies>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>3.8.1version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-coreartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-beansartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>dubboartifactId>
<version>2.4.9version>
dependency>
<dependency>
<groupId>org.apache.zookeepergroupId>
<artifactId>zookeeperartifactId>
<version>3.3.3version>
dependency>
<dependency>
<groupId>com.101tecgroupId>
<artifactId>zkclientartifactId>
<version>0.7version>
dependency>
dependencies>
<build>
<finalName>dubbo-demofinalName>
build>
project>
在DubboService中编写提供服务的代码。结构和内容如下：
ps: 请允许我用我蹩脚的英语装个B，截图软件我这个中文乱码。实属无奈。。。
appCtx.xml是spring的配置文件（内容是抄过来的，文章最后有地址）。内容如下：
<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">
<bean id="demoService" class="com.gemu.DemoServiceImpl">bean>
<dubbo:application name="demo_provider" />
<dubbo:registry address="zookeeper://localhost:2181" />
<dubbo:protocol name="dubbo" port="20880" />
<dubbo:service interface="com.gemu.intf.DemoService" ref="demoService" />
beans>
package com.gemu;
import com.gemu.intf.DemoService;
/**
* Created by Gemu on 2/27/2016 0027.
*/
public class DemoServiceImpl implements DemoService {
public String build() {
System.out.println("build success");
return "build success and return success";
}
}
Provider.java 内容如下， 启动dubbo。
package com.gemu;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;
/**
* Created by Gemu on 2/27/2016 0027.
*/
public class Provider {
public static void main(String[] args) throws IOException {
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("appCtx.xml");
ctx.start();
System.out.println("我咋这么帅呢");
System.in.read();
}
}
那么现在服务端已经准备好了，接下来就是消费端了。
DubboConsumer中的 appCtx.xml spring配置如下：
<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">
<dubbo:application name="demo_consumer" />
<dubbo:registry address="zookeeper://127.0.0.1:2181" />
<dubbo:reference id="demoService"
interface="com.gemu.intf.DemoService" />
beans>
Consumer.java 内容如下：
package com.gemu;
import com.gemu.intf.DemoService;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* Created by Gemu on 2/29/2016 0029.
*/
public class Consumer {
public static void main(String[] args) {
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("appCtx.xml");
DemoService demoService = (DemoService) ctx.getBean("demoService");
String retStr = demoService.build();
System.out.println(retStr);
}
}
首先你得启动zookeeper吧，不然还扯什么蛋。然后运行DubboService中的Provider.java（过程有时候慢，不清楚为啥，可能zookeeper的连接有些问题吧），控制台会出现如下内容:
log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.
我咋这么帅呢恭喜你，启动成功了。接下来运行DubboConsumer中的Consumer.java，测试消费者是否可以调用此服务吧。如果Provider的控制台和Consumer的控制台分别输入如下内容，那么恭喜你成功了。
log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.
我咋这么帅呢
build success
log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.
build success and return success
Process finished with exit code 0