1.下载源码
git clone https://github.com/apache/incubator-dubbo.git dubbo
2.导入Idea
源码目录结构
3.运行示例
dubbo源码中提供了dubbo-demo这个moudle,它提供了Consumer、Provider的最精简的配置（更多的复杂示例已经挪到https://github.com/dubbo/dubbo-samples）。
dubbo-demo
- pom.xml
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.alibaba</groupId>
<artifactId>dubbo-parent</artifactId>
<version>2.6.1</version>
</parent>
<artifactId>dubbo-demo</artifactId>
<packaging>pom</packaging>
<name>${project.artifactId}</name>
<description>The demo module of dubbo project</description>
<properties>
<skip_maven_deploy>true</skip_maven_deploy>
</properties>
<modules>
<module>dubbo-demo-api</module>
<module>dubbo-demo-provider</module>
<module>dubbo-demo-consumer</module>
</modules>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo-bom</artifactId>
<version>${project.parent.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
</project>
- API接口
package com.alibaba.dubbo.demo;
public interface DemoService {
String sayHello(String name);
}
- provider配置文件
<dubbo:registry address="multicast://224.5.6.7:1234"/>配置的是广播方式注册，如果有zk的话也可以直接配置注册到zk上
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
xmlns="http://www.springframework.org/schema/beans"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<!-- provider's application name, used for tracing dependency relationship -->
<dubbo:application name="demo-provider"/>
<!--<dubbo:monitor protocol="registry"></dubbo:monitor>-->
<!-- use multicast registry center to export service -->
<dubbo:registry address="multicast://224.5.6.7:1234"/>
<!--订阅并注册在zk上-->
<!-- use dubbo protocol to export service on port 20880 -->
<!--配置线程模式-->
<dubbo:protocol name="dubbo" port="20881" dispatcher="execution" threadpool="cached" threads="5"/>
<!-- service implementation, as same as regular local bean -->
<bean id="demoService" class="com.alibaba.dubbo.demo.provider.DemoServiceImpl"/>
<!-- declare the service interface to be exported -->
<dubbo:service interface="com.alibaba.dubbo.demo.DemoService" ref="demoService" protocol="dubbo"/>
</beans>
- Provider提供者实现
package com.alibaba.dubbo.demo.provider;
public class DemoServiceImpl implements DemoService {
public String sayHello(String name) {
System.out.println("[" + new SimpleDateFormat("HH:mm:ss").format(new Date()) + "] Hello " + name + ", request from consumer: " + RpcContext.getContext().getRemoteAddress());
return "Hello " + name + ", response from provider: " + RpcContext.getContext().getLocalAddressString();
}
}
- 启动服务提供者
public class Provider {
public static void main(String[] args) throws Exception {
//Prevent to get IPV6 address,this way only work in debug mode
//But you can pass use -Djava.net.preferIPv4Stack=true,then it work well whether in debug mode or not
System.setProperty("java.net.preferIPv4Stack", "true");
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"META-INF/spring/dubbo-demo-provider.xml"});
context.start();
System.in.read(); // press any key to exit
}
}
- 启动服务消费者
Consumer 会从注册中心拿到Provider 的地址，然后调用Provider并打印结果 。
public class Consumer {
public static void main(String[] args) {
//Prevent to get IPV6 address,this way only work in debug mode
//But you can pass use -Djava.net.preferIPv4Stack=true,then it work well whether in debug mode or not
System.setProperty("java.net.preferIPv4Stack", "true");
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"META-INF/spring/dubbo-demo-consumer.xml"});
context.start();
DemoService demoService = (DemoService) context.getBean("demoService"); // get remote service proxy
while (true) {
try {
Thread.sleep(1000);
String hello = demoService.sayHello("world"); // call remote method
System.out.println(hello); // get result
} catch (Throwable throwable) {
throwable.printStackTrace();
}
}
}
}
可以看到Consumer已经调用成功了
Hello world, response from provider: 192.168.0.1:20881
[11/06/18 02:07:53:053 CST] DubboClientHandler-192.168.0.1:20882-thread-1 DEBUG transport.DecodeHandler: [DUBBO] Decode decodeable message com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult, dubbo version: 2.0.0, current host: 192.168.0.1
Hello world, response from provider: 192.168.0.1:20882
[11/06/18 02:07:54:054 CST] DubboClientHandler-192.168.0.1:20881-thread-1 DEBUG transport.DecodeHandler: [DUBBO] Decode decodeable message com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult, dubbo version: 2.0.0, current host: 192.168.0.1
Hello world, response from provider: 192.168.0.1:20881
[11/06/18 02:07:55:055 CST] DubboClientHandler-192.168.0.1:20882-thread-1 DEBUG transport.DecodeHandler: [DUBBO] Decode decodeable message com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult, dubbo version: 2.0.0, current host: 192.168.0.1
Hello world, response from provider: 192.168.0.1:20882
[11/06/18 02:07:56:056 CST] DubboClientHandler-192.168.0.1:20881-thread-1 DEBUG transport.DecodeHandler: [DUBBO] Decode decodeable message com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult, dubbo version: 2.0.0, current host: 192.168.0.1
Hello world, response from provider: 192.168.0.1:20881
[11/06/18 02:07:57:057 CST] DubboClientHandler-192.168.0.1:20882-thread-1 DEBUG transport.DecodeHandler: [DUBBO] Decode decodeable message com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult, dubbo version: 2.0.0, current host: 192.168.0.1
Hello world, response from provider: 192.168.0.1:20882
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