Dubbo RPC框架入门实例完整操作，轻松入门
1、准备Dubbo的开发环境，包括Java，Maven，Eclipse
Apache Maven 3.5.2
Maven home: E:\apache-maven-3.5.2\bin\..
Java version: 1.8.0_151, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.8.0_151\jre
2、Dubbo入门实例规划
1）使用Maven构建工程
2）工程1：服务提供者，如test.love
3）工程2：服务消费者，如 love.comsumer
3、构建工程1基本框架：服务提供者 ，需要在maven工程文件pom.xml中加入dubbo的依赖，dubbo版本号选2.5.8.
Group ID: test
artifact Id: love
pom.xml文件内容如下：
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test</groupId>
<artifactId>love</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>怕包昆
<version>2.5.8</version>
</dependency>
</dependencies>
</project>
4、在工程1中，创建服务提供接口和实现类
1）DemoService.java 文件
package love;
public interface DemoService {
String sayHello(String name);
}
2)DemoServiceImpl.java文昆没件
package love;
public class DemoServiceImpl implements DemoService {
public String sayHello(String name) {
return "Hello " + name;
}
}
3) Lover.java文件
package love;
import java.io.IOException;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Lover {
public static void main(String[] args) throws IOException {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
new String[] {"META/spring/dubbo-demo-provider.xml"});
context.start();
// press any key to exit
System.in.read();
}
}
4）dubbo-spring服务配置文件META/spring/dubbo-demo-provider.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="吩况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-provider"/>
<dubbo:registry address="multicast://224.5.6.7:1234"/>
<dubbo:protocol name="dubbo" port="20880"/>
<dubbo:service interface="love.DemoService" ref="demoService"/>
<bean id="demoService" class="love.DemoServiceImpl"/>
</beans>
5、创建工程2基本结构，在maven的工程文件pom.xml文件中增加对dubbo和工程1的依赖
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>love</groupId>
<artifactId>comsumer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.8</version>
</dependency>
<dependency>
<groupId>test</groupId>
<artifactId>love</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
6、在工程2中实现服务消费的功能
1）Consumer.java文件
package consumer;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import love.DemoService;
public class Consumer {
public static void main(String[] args) {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
new String[]{"META/spring/dubbo-demo-consumer.xml"});
context.start();
// obtain proxy object for remote invocation
DemoService demoService = (DemoService) context.getBean("demoService");
// execute remote invocation
String hello = demoService.sayHello("world");
// show the result
System.out.println(hello);
}
}
2）spring服务配置文件 META/spring/dubbo-demo-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">
<dubbo:application name="demo-consumer"/>
<dubbo:registry address="multicast://224.5.6.7:1234"/>
<dubbo:reference id="demoService" interface="love.DemoService"/>
</beans>
7、启动工程1：服务提供者，开启服务
运行工程1的lover类，看到如下日志信息表示启动成功
十二月 29, 2017 11:06:18 上午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1099f62: startup date [Fri Dec 29 11:06:18 CST 2017]; root of context hierarchy
十二月 29, 2017 11:06:18 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [META/spring/dubbo-demo-provider.xml]
十二月 29, 2017 11:06:18 上午 com.alibaba.dubbo.common.logger.LoggerFactory info
信息: using logger: com.alibaba.dubbo.common.logger.jcl.JclLoggerAdapter
十二月 29, 2017 11:06:18 上午 com.alibaba.dubbo.config.AbstractConfig info
信息: [DUBBO] The service ready on spring started. service: love.DemoService, dubbo version: 2.5.8, current host: 127.0.0.1
十二月 29, 2017 11:06:19 上午 com.alibaba.dubbo.config.AbstractConfig info
信息: [DUBBO] Export dubbo service love.DemoService to local registry, dubbo version: 2.5.8, current host: 127.0.0.1
8、启动工程2：消费者服务
运行consumer.java 类，可以看到日志输出服务调用的结果：“Hello world”
信息: [DUBBO] Refer dubbo service love.DemoService from url multicast://224.5.6.7:1234/com.alibaba.dubbo.registry.RegistryService?anyhost=true&application=demo-consumer&check=false&dubbo=2.5.8&generic=false&interface=love.DemoService&methods=sayHello&pid=9036®ister.ip=192.168.26.157&remote.timestamp=1514516779019&side=consumer×tamp=1514517590228, dubbo version: 2.5.8, current host: 192.168.26.157
Hello world
十二月 29, 2017 11:19:50 上午 com.alibaba.dubbo.config.AbstractConfig info
信息: [DUBBO] Run shutdown hook now., dubbo version: 2.5.8, current host: 192.168.26.157
