dubbo(4) 消费者订阅和消费服务

1 项目结构

2 maven依赖

3 applicationcontext.xml

<!-- 采用注释的方式配置bean -->
<context:annotation-config />

<!-- 配置要扫描的包 -->
<context:component-scan base-package="com.chy.service" />

<!-- proxy-target-class默认"false",更改为"ture"使用CGLib动态代理 -->
<aop:aspectj-autoproxy proxy-target-class="true" />

<import resource="dubbo-consumer.xml" />

4 dubbo-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-consumer-one" />

    <!-- 使用zookeeper注册中心暴露服务地址 -->
    <!-- 注册中心地址 -->
    <dubbo:registry protocol="zookeeper" address="127.0.0.1:2181" />

    <!-- 用户服务接口，和服务类名对应 -->
    <dubbo:reference interface="com.chy.service.HelloService"  id="helloService" />

</beans>

5 订阅接口

订阅的接口和服务发布的接口一致

package com.chy.service;

/**
 * Created by chy on 2017/12/8.
 */
public interface HelloService {

    String sayHello(String str);

}

6 程序入口

package com.chy;

import com.chy.service.HelloService;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Hello world!
 *
 */
public class App 
{
private static ClassPathXmlApplicationContext context;

    public static void main( String[] args ) throws IOException
    {
context = new ClassPathXmlApplicationContext("applicationcontext.xml");
        System.out.println(context.getDisplayName() + ": here");
        context.start();
        System.out.println("dubbo客户端端读取数据开始...");
        new Thread(new Runnable() {
            @Override
            public void run() {
                HelloService demoService = (HelloService) context.getBean("helloService");
                SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                while (true) {
                    try {
                        System.out.println(demoService.sayHello(format.format(new Date())));
                        Thread.sleep(2000);
                    }
                    catch (Exception ex){
                        System.out.println(ex.toString());
                    }
                }
            }
        }).start();
        System.out.println("dubbo客户端读取数据结束...");
        System.in.read();
    }
}

7 启动效果

服务注册了2个进行消费均衡负载

dubbo(4) 消费者订阅和消费服务

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