dubbo进阶--入门实例

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注册中心搭建好之后，现在开始进行一个dubbo实例，来体验一下dubbo的魅力。

为了方便的管理jar包，本次使用的是maven项目。

项目主要结构：

提供者：

消费者：

实现过程：

本次的demo属于简单入门，所以从代码上来看没有多少，主要是看dubbo是如何进行提供分布式服务的。

服务提供者：

首先配置pom文件，引入必要的jar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/xsd/maven-4.0.0.xsd">  <modelVersion>4.0.0</modelVersion>  <groupId>com.wpb.dubbo</groupId>  <artifactId>dubbo-provide</artifactId>  <version>0.0.1-SNAPSHOT</version>    <properties><spring.version>4.1.3.RELEASE</spring.version></properties><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-context</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-webmvc</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-aspects</artifactId><version>${spring.version}</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>dubbo</artifactId><version>2.4.10</version><exclusions><exclusion><artifactId>spring</artifactId><groupId>org.springframework</groupId></exclusion></exclusions></dependency><dependency><groupId>com.101tec</groupId><artifactId>zkclient</artifactId><version>0.3</version></dependency></dependencies></project>

接口，就定义了一个sayHello方法：

public interface DubboProvide {void sayHello();}

接口实现方法：

public class DubboProvideImpl implements DubboProvide {public void sayHello() {       System.out.println("this is my first dubbo program");}}

方法定义好之后，进行核心配置文件的配置ApplicaionContextProducror.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          ">              <!-- 给dubbo服务者起个名 -->          <dubbo:application name="productor"/>          <!-- 用zookeeper注册服务中心暴露服务地址 -->          <dubbo:registry protocol="zookeeper" address="zookeeper://192.168.91.130:2181"/>          <!-- 暴露dubbo的通信端口 -->          <dubbo:protocol name="dubbo" port="20880"/>          <!-- 给消费者提供服务的接口 -->          <dubbo:service ref="bubboProdutor" interface="com.dubbo.service.DubboProvide"></dubbo:service>          <!-- 提供服务的实现类 -->          <bean id="bubboProdutor" class="com.dubbo.service.impl.DubboProvideImpl"></bean>  </beans>

然后创建main方法来启动服务，方法如下：

public class DubboProvideStart { public static void main(String[] args) throws Exception {          ClassPathXmlApplicationContext cfg = new ClassPathXmlApplicationContext("classpath:config/ApplicationContextProducror.xml");          cfg.start();          SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");          Date date = new Date();           System.out.println("provider service start time："+sdf.format(date));          //保证服务始终开启          System.in.read();      }  }

服务提供方启动之后，再来看一下消费者的主要代码：

pom文件：

<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.wpb.dubbo</groupId>  <artifactId>dubbo-consumer</artifactId>  <version>0.0.1-SNAPSHOT</version>    <properties><spring.version>4.1.3.RELEASE</spring.version></properties><dependencies>   <dependency>        <!-- 引入提供方服务接口 --><groupId>com.wpb.dubbo</groupId><artifactId>dubbo-provide</artifactId><version>0.0.1-SNAPSHOT</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</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-webmvc</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-aspects</artifactId><version>${spring.version}</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>dubbo</artifactId><version>2.4.10</version><exclusions><exclusion><artifactId>spring</artifactId><groupId>org.springframework</groupId></exclusion></exclusions></dependency><dependency><groupId>com.101tec</groupId><artifactId>zkclient</artifactId><version>0.3</version></dependency></dependencies></project>

配置文件ApplicationContextCustomer.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          ">                         <!-- 消费者名称 -->          <dubbo:application name="customer"/>          <!-- 用zookeeper注册服务中心发现服务地址 -->          <dubbo:registry protocol="zookeeper"  address="zookeeper://192.168.91.130:2181"/>          <!-- 调用远程的接口 -->          <dubbo:reference id="dubboProvider" interface="com.dubbo.service.DubboProvide"/>            </beans>

配置好之后，就可以创建main方法来启动消费者了，方法如下：

public class CustomerMain { public static void main(String[] args) throws InterruptedException{          ClassPathXmlApplicationContext cfig = new ClassPathXmlApplicationContext("classpath:config/ApplicationContextCustomer.xml");          DubboProvide test = (DubboProvide) cfig.getBean("dubboProvider");          System.out.println("consumer connect to service begin");          test.sayHello();          Thread.sleep(100000);          System.out.println("consumer connect to service end");      }  }

demo下载地址：dubbo+zookeeper入门实例

至此，dubbo的提供方和消费方已经创建好，我们也可以通过启动程序来看到真实的效果，然后就可以通过代码来感受一下dubbo的优点。

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