一个dubbo小实例

最新推荐文章于 2025-08-06 16:23:50 发布

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最新推荐文章于 2025-08-06 16:23:50 发布

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文章标签： java 大数据

原文链接：https://my.oschina.net/ChiLin/blog/1574792

本文介绍了一个基于Dubbo和Zookeeper的服务注册与发现的实例，详细展示了服务提供者与消费者如何通过Zookeeper进行交互。文章包括了必要的Maven配置、接口定义、服务实现、Spring配置等内容。

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Dubbo使用Zookeeper作为注册与发现服务的组件之一，首先安装Zookeeper，并在Zookeeper服务器启动server。 Dubbo官方文档：http://dubbo.io/

1.maven pom.xml

<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.x</groupId>
  <artifactId>dubbo-demo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
  <name>dubbo-demo</name>
  <description>dubbo-demo</description>
  <modules>
    <module>dubbo-demo-api</module>
    <module>dubbo-demo-provider</module>
    <module>dubbo-demo-consumer</module>
  </modules>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
  
  </dependencies>
</project>

2.服务提供方和服务消费放需要同一个接口

接口

/**
 *
 * Created by lin on 2017/10/22.
 *
 */
public interface IService {

    public String sayHello(String name);
}

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>
    <parent>
        <groupId>com.x</groupId>
        <artifactId>dubbo-demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>dubbo-demo-api</artifactId>
    <name>dubbo-demo-api</name>
    <packaging>jar</packaging>
    <description>API</description>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

3.服务提供方

接口实现

import com.x.demo.api.IService;

/**
 *
 * Created by lin on 2017/10/22.
 *
 */
public class SimpleServiceImpl implements IService {

    public String sayHello(String name) {

        return "Service for name:" + name;
    }
}

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>
    <parent>
        <groupId>com.x</groupId>
        <artifactId>dubbo-demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>dubbo-demo-provider</artifactId>
    <name>dubbo-demo-provider</name>
    <packaging>jar</packaging>
    <description>Provider</description>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>

        <dependency>
            <groupId>com.x</groupId>
            <artifactId>dubbo-demo-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>

        <!-- 添加Spring context依赖 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>org.springframework.context</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>

        <!-- 引入Dubbo依赖 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
        </dependency>

        <!-- zookeeper依赖 -->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.6</version>
        </dependency>

        <!-- zookeeper客户端 zkclient -->
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>

    </dependencies>
</project>

Spring配置

<?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">

    <!--定义了提供方应用信息，用于计算依赖关系；在 dubbo-admin 或 dubbo-monitor 会显示这个名字，方便辨识-->
    <dubbo:application name="dubbo-demo-provider" owner="lin" organization="kn"/>

    <!--使用 zookeeper 注册中心暴露服务，注意要先开启 zookeeper-->
    <dubbo:registry address="zookeeper://192.168.0.105:2181"/>

    <!-- 用dubbo协议在20880端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20880" />

    <!--使用 dubbo 协议实现定义好的 服务 接口-->
    <dubbo:service interface="com.x.demo.api.IService" ref="simpleService" protocol="dubbo" />

    <!--具体实现该接口的 bean-->
    <bean id="simpleService" class="com.x.demo.service.SimpleServiceImpl"/>
</beans>

<dubbo:registry address="zookeeper://192.168.0.105:2181"/> 中的地址是我安装Zookeeper的服务器地址和zookeeper配置的端口。

启动服务：

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 *
 * Created by lin on 2017/10/29.
 *
 */
public class App {

    public static void main(String[] args) {

        try {
            ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
            applicationContext.start();

            System.out.println("服务已经启动...");
            System.in.read();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

4.服务消费方

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>
    <parent>
        <groupId>com.x</groupId>
        <artifactId>dubbo-demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>dubbo-demo-consumer</artifactId>
    <name>dubbo-demo-consumer</name>
    <packaging>jar</packaging>
    <description>Consumer</description>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>

        <dependency>
            <groupId>com.x</groupId>
            <artifactId>dubbo-demo-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>

        <!-- 添加Spring context依赖 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>org.springframework.context</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>

        <!-- 引入Dubbo依赖 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
        </dependency>

        <!-- zookeeper依赖 -->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.6</version>
        </dependency>

        <!-- zookeeper客户端 zkclient -->
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>

    </dependencies>
</project>

Spring配置

<?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-demo-consumer" owner="lin" organization="kn"/>

    <!--向 zookeeper 订阅 provider 的地址，由 zookeeper 定时推送-->
    <dubbo:registry address="zookeeper://192.168.0.105:2181"/>

    <!--使用 dubbo 协议调用定义好的 服务 接口-->
    <dubbo:reference id="simpleService" interface="com.x.demo.api.IService"/>
</beans>

调用服务

import com.x.demo.api.IService;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * Hello world!
 *
 */
public class App {
    public static void main( String[] args ) {

        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        applicationContext.start();

        IService service = applicationContext.getBean(IService.class);
        String result = service.sayHello("linjinzhi");

        System.out.println(result);
    }
}

转载于:https://my.oschina.net/ChiLin/blog/1574792