关于dubbo和zookeeper 注册中心
Dubbo采用全Spring配置方式,透明化接入应用,对应用没有任何API侵入,只需用Spring加载Dubbo的配置即可,Dubbo基于Spring的Schema扩展进行加载。如果不想使用Spring配置,而希望通过API的方式进行调用(不推荐)
下载zookeeper注册中心,下载地址:http://www.apache.org/dyn/closer.cgi/zookeeper/ 下载后解压即可,进入D:\apach-zookeeper-3.4.5\bin,
双击zkServer.cmd启动注册中心服务。
首先声明你要暴露的接口类(这个类将被暴露在zookeeper注册中心中):
<?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="demoService" class="com.unj.dubbotest.provider.DemoServiceImpl" /> <!-- 提供方应用信息,用于计算依赖关系 --> <dubbo:application name="xixi_provider" /> <!-- 使用multicast广播注册中心暴露服务地址 <dubbo:registry address="multicast://224.5.6.7:1234" />--> <!-- 使用zookeeper注册中心暴露服务地址 --> <dubbo:registry address="zookeeper://127.0.0.1:2181" /> <!-- 用dubbo协议在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="com.unj.dubbotest.provider.DemoService" ref="demoService" /> </beans>
加载Spring配置,启动服务:
package com.unj.dubbotest.provider; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Provider { public static void main(String[] args) throws Exception { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"applicationContext.xml"}); context.start(); System.in.read(); // 为保证服务一直开着,利用输入流的阻塞来模拟 } }
服务消费者:
applicationContext-dubbo.xml 中注册自己需要调用的接口,我刚开始测试的时候需要的接口很多,所以把这个文件写的满满的,后来熟悉了把接口按业务类型分开,写了N多个 applicationContext-dubbo-***.xml 简练多了 。
通过Spring配置远程调用注册在zookeeper中的接口:
<?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="hehe_consumer" /> <!-- 使用zookeeper注册中心暴露服务地址 --> <!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> --> <dubbo:registry address="zookeeper://127.0.0.1:2181" /> <!-- 生成远程服务代理,可以像使用本地bean一样使用demoService --> <dubbo:reference id="demoService" interface="com.unj.dubbotest.provider.DemoService" /> </beans>
2.加载Spring配置,并调用远程服务:
package com.alibaba.dubbo.demo.pp; import java.util.List; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.unj.dubbotest.provider.DemoService; public class Consumer { public static void main(String[] args) throws Exception { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "applicationContext.xml" }); context.start(); DemoService demoService = (DemoService) context.getBean("demoService"); // String hello = demoService.sayHello("tom"); // ִ System.out.println(hello); // // List list = demoService.getUsers(); if (list != null && list.size() > 0) { for (int i = 0; i < list.size(); i++) { System.out.println(list.get(i)); } } // System.out.println(demoService.hehe()); System.in.read(); } }
以上代码参考https://blog.csdn.net/zhousenshan/article/details/54980874
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