Dubbo入门教程
服务端(dubbo-server)
1. pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>com.lwb</groupId>
<artifactId>dubbo-server</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- spring begin -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<!-- spring end -->
<!-- dubbo begin -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>
<!-- dubbo end -->
<!-- 注册中心zookeeper begin -->
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.3.6</version>
</dependency>
<!-- 注册中心zookeeper end -->
<!-- log begin -->
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<exclusions>
<exclusion>
<groupId>com.sun.jdmk</groupId>
<artifactId>jmxtools</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jmx</groupId>
<artifactId>jmxri</artifactId>
</exclusion>
<exclusion>
<artifactId>jms</artifactId>
<groupId>javax.jms</groupId>
</exclusion>
<exclusion>
<artifactId>mail</artifactId>
<groupId>javax.mail</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- log end -->
<!-- other begin -->
<dependency>
<groupId>org.jboss.netty</groupId>
<artifactId>netty</artifactId>
<version>3.2.0.Final</version>
</dependency>
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<version>0.8</version>
</dependency>
<!-- other end -->
</dependencies>
</project>
2. dubbo.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="dubbo-server" owner="lwb" />
<!-- zookeeper注册中心 -->
<dubbo:registry address="zookeeper://127.0.0.1:2181" />
<dubbo:protocol contextpath="dubbo" port="20881" />
<dubbo:monitor protocol="registry"/>
<!-- 服务具体实现 -->
<bean id="elasticService" class="com.lwb.service.impl.ElasticServiceImpl" />
<!-- 向注册中心注册暴漏服务地址,注册服务 -->
<dubbo:service interface="com.lwb.service.ElasticService" ref="elasticService" protocol="dubbo" timeout="50000"/>
3. 代码
package com.lwb.service;
/** * @author liuweibo * @date 2018/5/9 */
public interface ElasticService {
String helloDubbo(String msg);
}
package com.lwb.service.impl;
import com.lwb.service.ElasticService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
/** * @author liuweibo * @date 2018/5/9 */
public class ElasticServiceImpl implements ElasticService {
private static final Logger LOGGER = LoggerFactory.getLogger(ElasticServiceImpl.class);
public String helloDubbo(String msg) {
System.out.println(msg);
return "hi!" + msg;
}
}
4. 项目结构
5. 启动类(Application.java)
这里就直接用main方法启动了
package com.lwb;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;
/** * @author liuweibo * @date 2018/5/9 */
public class Application {
public static void main(String[] args) throws IOException {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "dubbo.xml" });
context.start();
System.out.println("任意按键退出");
System.in.read();
context.close();
}
}
客户端(dubbo-client)
1. pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>com.lwb</groupId>
<artifactId>dubbo-client</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- spring begin -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<!-- spring end -->
<!-- dubbo begin -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>
<!-- dubbo end -->
<!-- 注册中心zookeeper begin -->
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.3.6</version>
</dependency>
<!-- 注册中心zookeeper end -->
<!-- log begin -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<exclusions>
<exclusion>
<groupId>com.sun.jdmk</groupId>
<artifactId>jmxtools</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jmx</groupId>
<artifactId>jmxri</artifactId>
</exclusion>
<exclusion>
<artifactId>jms</artifactId>
<groupId>javax.jms</groupId>
</exclusion>
<exclusion>
<artifactId>mail</artifactId>
<groupId>javax.mail</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- log end -->
<!-- other begin -->
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<version>0.8</version>
</dependency>
<dependency>
<groupId>com.lwb</groupId>
<artifactId>dubbo-server</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!-- other end -->
</dependencies>
</project>
2. dubbo.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="consumer-of-dubbo-demo" />
<dubbo:registry address="zookeeper://127.0.0.1:2181" />
<!-- 向注册中心订阅服务 -->
<dubbo:reference id="elasticService" interface="com.lwb.service.ElasticService" />
</beans>
3. 服务调用(这里为了简单,就在main方法里面处理了哈,Application.java)
package com.lwb;
import com.lwb.service.ElasticService;
import com.lwb.service.impl.ElasticServiceImpl;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/** * @author liuweibo * @date 2018/5/9 */
public class Application {
public static void main(String[] args) {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
new String[] { "dubbo.xml" });
context.start();
ElasticService service = (ElasticService) context.getBean("elasticService");
System.out.println(service.helloDubbo("world"));
context.close();
}
}
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