Dubbo第一章：Dubbo-admin编译和Dubbo简单入门
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背景
Dubbo的开源人梁飞在内部的交流会上宣布重启dubbo的维护和更新，具体PPT内容请看我的个人订阅号。
因此本文基于2017-12-10号的维护的版本dubbo-2.5.7。
这里为何从Dubbo-admin开始，这不是最重要的部分，但是却是dubbo源码编译最简单的部分。
准备工作
按照zookeeper服务（参考单机安装zookeeper安装）
下载dubbo源码
https://github.com/alibaba/dubbo/releases/tag/dubbo-2.5.7
当然也可以直接从我的github上面直接下载已经编译好了的war包
https://github.com/BambooZhang/dubbo-study
编译
解压后这里只用到一个项目就是dubbo-admin
cd D:\git_space\dubbo-dubbo-2.5.7\dubbo-dubbo-2.5.7\dubbo-adminmvn package -Dmaven.skip.test=true 出现下面的结果则说明编译成功
[INFO][INFO] --- maven-war-plugin:2.2:war (default-war) @ dubbo-admin ---[INFO] Packaging webapp[INFO] Assembling webapp [dubbo-admin] in [D:\git_space\dubbo-dubbo-2.5.7\dubbo-dubbo-2.5.7\dubbo-admin\target\dubbo-admin-2.5.7][INFO] Processing war project[INFO] Copying webapp resources [D:\git_space\dubbo-dubbo-2.5.7\dubbo-dubbo-2.5.7\dubbo-admin\src\main\webapp][INFO] Webapp assembled in [880 msecs][INFO] Building war: D:\git_space\dubbo-dubbo-2.5.7\dubbo-dubbo-2.5.7\dubbo-admin\target\dubbo-admin-2.5.7.war[INFO] WEB-INF\web.xml already added, skipping[INFO] ------------------------------------------------------------------------[INFO] BUILD SUCCESS[INFO] ------------------------------------------------------------------------[INFO] Total time: 24.516 s[INFO] Finished at: 2017-12-10T17:38:17+08:00[INFO] Final Memory: 19M/244M[INFO] ------------------------------------------------------------------------部署dubbo-admin到tomcat
把target\dubbo-admin-2.5.7下面的文件都拷贝到tomcat/webapps/ROOT下面
修改配置dubbo.properties
zookeeper地址修改为自己安装的ip地址，默认是127.0.0.1
dubbo.registry.address=zookeeper://192.168.0.91:2181dubbo.admin.root.password=rootdubbo.admin.guest.password=guest启动dubbo-admin
首先启动zookeeper服务，在启动tomcat
启动完成访问localhost:8080
默认账号密码都是root
Dubbo服务提供者和消费者demo
dubbo-admin-2.5.7.war管理中心
dubbo-provider服务器提供者
dubbo-consumer服务器消费者
spring版本：4.3.9.RELEASE
dubbo-provider服务器提供者
pom
<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.bamboo</groupId> <artifactId>dubbo-provider</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>dubbo-provider</name> <url>http://maven.apache.org</url> <repositories> <repository> <id>maven-ali</id> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>true</enabled> <updatePolicy>always</updatePolicy> <checksumPolicy>fail</checksumPolicy> </snapshots> </repository> </repositories> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <spring.version>4.3.9.RELEASE</spring.version> </properties> <dependencies> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.7</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>0.1</version> </dependency> <!-- spring相关 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jms</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies></project>applicationProvider.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 "> <!-- 具体的实现bean --> <bean id="providerService" class="com.bamboo.dubbo_provider.ProviderServiceImpl" /> <!-- 提供方应用信息，用于计算依赖关系 --> <dubbo:application name="dubbo_provider" /> <!-- 使用multicast广播注册中心暴露服务地址 <dubbo:registry address="multicast://localhost:1234" />--> <!-- 使用zookeeper注册中心暴露服务地址 127.0.0.1:2181 --> <dubbo:registry address="zookeeper://192.168.0.91:2181" /> <!-- 用dubbo协议在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="29014" /> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="com.bamboo.service.ProviderService" ref="providerService" /> </beans> java
service
package com.bamboo.service;public interface ProviderService { public String sayHello(String name);}ProviderServiceImpl
package com.bamboo.dubbo_provider;import com.bamboo.service.ProviderService;public class ProviderServiceImpl implements ProviderService { public String sayHello(String name) { return "Hello:"+name+"你好，你好~~"; } }main.java
package com.bamboo.dubbo_provider;import java.io.IOException;import org.springframework.context.support.ClassPathXmlApplicationContext;/** * dubbo 服务提供端 * @author bamboo */public class App { public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[]{"applicationProvider.xml"}); context.start(); System.out.println("提供者服务已注册成功"); System.out.println("请按任意键取消提供者服务"); try { System.in.read();//让此程序一直跑，表示一直提供服务 } catch (IOException e) { e.printStackTrace(); } }}运行
log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).log4j:WARN Please initialize the log4j system properly.提供者服务已注册成功请按任意键取消提供者服务dubbo-consumer服务器消费者
pom
<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.bamboo</groupId> <artifactId>dubbo-consumer</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>dubbo-consumer</name> <url>http://maven.apache.org</url> <repositories> <repository> <id>maven-ali</id> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>true</enabled> <updatePolicy>always</updatePolicy> <checksumPolicy>fail</checksumPolicy> </snapshots> </repository> </repositories> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <spring.version>4.3.9.RELEASE</spring.version> </properties> <dependencies> <!-- 添加dubbo依赖 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.7</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring</artifactId> </exclusion> </exclusions> </dependency> <!-- 添加zk客户端依赖 --> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>0.1</version> </dependency> <!-- spring相关 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jms</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies></project>applicationConsumer.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 "> <!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 --> <dubbo:application name="dubbo_consumer" /> <!-- 使用multicast广播注册中心暴露发现服务地址127.0.0.1:2181 --> <dubbo:registry protocol="zookeeper" address="zookeeper://192.168.0.91:2181" /> <!-- 生成远程服务代理，可以和本地bean一样使用demoService --> <dubbo:reference id="providerService" interface="com.bamboo.service.ProviderService" /> </beans>java
service
package com.bamboo.service;public interface ProviderService { public String sayHello(String name);}main
package com.bamboo.dubbo_consumer;import java.io.IOException;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.bamboo.service.ProviderService;/** * dubbo 服务消费端 * @author bamboo * */public class App { public static void main(String[] args) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "applicationConsumer.xml" }); context.start(); ProviderService providerService = (ProviderService) context.getBean("providerService"); System.out.println(providerService.sayHello("bamboo")); System.out.println("Press any key to exit."); try { System.in.read(); } catch (IOException e) { e.printStackTrace(); } } }运行
log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).log4j:WARN Please initialize the log4j system properly.Hello:bamboo你好，你好~~Press any key to exit.查看监控列表
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