Dubbo初体验

Apache Dubbo 是一款高性能、轻量级的开源服务框架。提供了六大核心能力：面向接口代理的高性能RPC调用，智能容错和负载均衡，服务自动注册和发现，高度可扩展能力，运行期流量调度，可视化的服务治理与运维。 一、Dubbo如何实现远程通信？

服务消费者去注册中心订阅到服务提供者的信息。然后通过dubbo进行远程调用。

命名my-service-interfaces创建接口DeviceService

命名device-service-providerpom.xml

    
        my-dubbo-demo
        com.hao
        1.0-SNAPSHOT
    
    4.0.0

    device-service-provider
    
        
            org.slf4j
            slf4j-api
            1.8.0-alpha2
        

        
        
            org.apache.dubbo
            dubbo
            2.7.3
        
        
        
            org.apache.curator
            curator-framework
            4.1.0
        
        
            org.apache.curator
            curator-client
            4.1.0
        
        
            org.apache.curator
            curator-recipes
            4.1.0
        
        
            org.apache.zookeeper
            zookeeper
            3.4.13
        
        
            com.hao
            my-service-interfaces
            1.0-SNAPSHOT
            compile
        
    

编写具体的提供服务的实现类


编写bean配置文件，将dubbo和spring ioc整合，把服务提供到dubbo中.provider.xml

启动ioc容器，关联bean配置文件,provider.java

package com.hao.device.service.impl;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

public class Provider {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"provider.xml"});
        context.start();
        System.out.println("服务已注册！");
        try {
            // 按任意键退出
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

命名device-service-consumerpom.xml

    
        my-dubbo-demo
        com.hao
        1.0-SNAPSHOT
    
    4.0.0

    device-service-consumer

    
        
            my-service-interfaces
            com.hao
            1.0-SNAPSHOT
        

        
        
            org.apache.dubbo
            dubbo
            2.7.3
        
        
        
            org.apache.curator
            curator-framework
            4.1.0
        
        
            org.apache.curator
            curator-client
            4.1.0
        
        
            org.apache.curator
            curator-recipes
            4.1.0
        
        
            org.apache.zookeeper
            zookeeper
            3.4.13
        
    

编写bean配置文件，将dubbo和spring ioc整合，把服务提供到dubbo中.consumer.xml

启动ioc容器，关联bean配置文件 Consumer.java

package com.hao.device.consumer;

import com.hao.service.api.device.DeviceService;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Consumer {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"consumer.xml"});
        context.start();
        DeviceService deviceService = (DeviceService) context.getBean("deviceService");
        String result = deviceService.getDeviceNameByID(1001);
        System.out.println(result);
    }
}