分布式学习系列【dubbo入门实践】

分布式学习系列【dubbo入门实践】

dubbo架构

  

  

  组成部分:provider,consumer,registry,monitor; provider,consumer注册,订阅类似于消息队列的注册订阅

  

一、环境安装

1、dubbo admin 管理控制台安装(Windows环境)

     #下载dubbo-admin-2.5.3.war,部署到tomcat下,根据需要编辑WEB-INF/dubbo.properties文件:

  dubbo.registry.address=zookeeper://127.0.0.1:2181

  dubbo.admin.root.password=root

  dubbo.admin.guest.password=guest

 

  #dubbo admin 部署问题:版本2.5.3启动报错:Bean property 'URIType' is not writable or has an invalid

  原因:使用了JDK1.8;

  解决方法:将环境变量JAVA_HOME设置为JDK1.7;

2、zookeeper 安装

  dubbo对注册中心实现了抽象,实现的注册中心有:ZooKeeper,Redis,Multicast;这里采用zookeeper进行演示。

  下载zookeeper解压,在zookeeper->conf目录下复制一份zoo_sample.cfg为zoo.cfg,修改配置

  添加配置:(默认不会自动创建,需要手动添加)

  dataDir=D:\\zookeeper\\data   
  dataLogDir=D:\\zookeeper\\log

  下载后windows下直接进入doc,进入zookeeper->bin目录运行zkServer.cmd命令;

      可以用netstat -ano|findstr "2181"检查是否启动成功  

   TCP 0.0.0.0:2181 0.0.0.0:0 LISTENING 5716
  TCP 127.0.0.1:2181 127.0.0.1:53785 ESTABLISHED 5716
  TCP 127.0.0.1:53785 127.0.0.1:2181 ESTABLISHED 9752
  TCP [::]:2181 [::]:0 LISTENING 5716    

       也可用JPS查看:  

   8608 SmartGit
  8992 Jps
  5716 QuorumPeerMain
  9752 Bootstrap

 

3、启动tomcat访问:localhost:8080

 

 

 二、实践步骤

#创建服务接口  

public interface DemoService {
    String sendMessage(String message);
}

#创建接口实现

public class DemoServiceImpl implements DemoService {
    @Override
    public String sendMessage(String message){
        System.out.println("this demoService get message:"+message);
        return "provirder return message success";
    }
}

#创建提供方spring配置文件provider.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-demo-test"  />
    <!-- 使用zookeeper注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />
    <!-- 生成远程服务代理,可以和本地bean一样使用demoService -->
    <dubbo:reference id="demoService" interface="com.demo.DemoService" />
</beans>

#创建提供方启动程序:DemoProvider 

public class DemoProvider {
    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("provider.xml");
        context.start();
        System.out.println("provider started ...");
        System.in.read();
    }
}

#创建消费方spring配置文件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">
    <!-- 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-demo-test"  />
    <!-- 使用zookeeper注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />
    <!-- 生成远程服务代理,可以和本地bean一样使用demoService -->
    <dubbo:reference id="demoService" interface="com.demo.DemoService" />
</beans>

#创建消费方方启动程序:DemoConsumer   

public class DemoConsumer {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("consumer.xml");
        context.start();
        DemoService demoService = (DemoService) context.getBean("demoService");
        String returnMessage = demoService.sendMessage("consumer send message: hello my first dubbo service");
        System.out.println("provider return message:"+returnMessage);
    }
}

  

 #添加项目maven依赖

分别加入spring IOC,zkClient,dubbo依赖

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>3.0.5.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>3.0.5.RELEASE</version>
</dependency>
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>dubbo</artifactId>
    <version>2.5.3</version>
</dependency>
<dependency>
    <groupId>com.github.sgroschupf</groupId>
    <artifactId>zkclient</artifactId>
    <version>0.1</version>
</dependency>

  

#启动提供方服务,消费方进行调用

运行启动提供方DemoProvider,启动后进入待服务状态

观察dubbo admin发现已经刚才的启动服务在zookeepr成功注册

 

这时消费方可以进行调用,运行DemoConsumer 

此时服务端收到请求:

调用方收到响应:

 

附上示例代码:  https://files.cnblogs.com/files/yuxuan/dubbo-demo.rar

 

posted on 2016-11-30 18:37  程雨轩  阅读(1452)  评论(0编辑  收藏  举报

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