Dubbo多版本

当一个接口实现，出现不兼容升级时，可用使用版本号过度，版本号不同的服务间不引用。实现代码如下：
服务器端代码实现：

package com.yncp.dubbo.service;

public interface IDubboVersionService {  
    public String Version();    
}

package com.yncp.dubbo.service.impl;

import com.yncp.dubbo.service.IDubboVersionService;

public class DubboVersion1ServiceImpl implements IDubboVersionService {

    @Override
    public String Version() {        
        return "1.0.0版本";
    }    

}

package com.yncp.dubbo.service.impl; 

import com.yncp.dubbo.service.IDubboVersionService;

public class DubboVersion2ServiceImpl implements IDubboVersionService {

    @Override
    public String Version() { 
        return "1.0.1版本";
    }



}

applicationContext.xml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">

    <!-- 配置Bean -->
    <bean id="versionService1" class="com.yncp.dubbo.service.impl.DubboVersion1ServiceImpl"/>
    <bean id="versionService2" class="com.yncp.dubbo.service.impl.DubboVersion2ServiceImpl"/>
    <!-- 引入配置文件 -->
    <import resource="classpath:dubbo.xml"/>
 </beans>

dubbo.xml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">

    <!-- 指定web服务名字 -->
    <dubbo:application name="DubboVersion"/>
    <!-- 声明服务注册中心 -->
    <dubbo:registry  protocol="zookeeper" address="127.0.0.1:2181"/>
    <!-- 指定传输层通信协议 -->
    <dubbo:protocol name="dubbo" port="20880"/>
    <dubbo:protocol name="rmi" port="1099"/>

    <!-- 暴露你的服务地址 -->
    <dubbo:service 
        ref="versionService1" 
        interface="com.yncp.dubbo.service.IDubboVersionService"
        protocol="dubbo,rmi"
        version="1.0.0"
    />
     <dubbo:service 
        ref="versionService2" 
        interface="com.yncp.dubbo.service.IDubboVersionService"
        protocol="dubbo,rmi"
        version="1.0.1"
    />
 </beans>

客户端实现代码：

package com.yncp.dubbo.service;

public interface IDubboVersionService {
    public String Version();    
}

applicationContext.xml 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">

    <!-- 引入配置文件 -->
    <import resource="classpath:dubbo.xml"/>
 </beans>

dubbo.xml 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">

    <!-- 指定web服务名字 -->
    <dubbo:application name="DubboVersion"/>
    <!-- 声明服务注册中心 -->
    <dubbo:registry protocol="zookeeper" address="127.0.0.1:2181"/>

    <!-- 指定传输层通信协议 -->
    <dubbo:protocol name="dubbo" port="20881"/>
    <dubbo:protocol name="rmi" port="1010"/>

    <!-- 暴露你的服务地址 -->
    <dubbo:reference 
        id="versionService1" 
        interface="com.yncp.dubbo.service.IDubboVersionService"
        protocol="dubbo"
        version="1.0.0"
    />
     <dubbo:reference 
        id="versionService2" 
        interface="com.yncp.dubbo.service.IDubboVersionService"
        protocol="dubbo"
        version="1.0.1"
    />
    <dubbo:reference 
        id="versionService3" 
        interface="com.yncp.dubbo.service.IDubboVersionService"
        protocol="dubbo"
        version="*"
    />
 </beans>

客户端调用代码：

package com.yncp.dubbo.service;
import java.io.IOException;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext; 


public class DubboStart{
    //<dubbo:reference id="demoService"  interface="com.baizhi.service.IDemoService" protocol="dubbo" check="false" />
    public static void main(String[] args) throws IOException {
        ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
        //访问1.0.0版本
        IDubboVersionService versionService1=(IDubboVersionService) ctx.getBean("versionService1");
        System.out.println(versionService1.Version());
        //访问1.0.1版本
        IDubboVersionService versionService2=(IDubboVersionService) ctx.getBean("versionService2");
        System.out.println(versionService2.Version());

        //访问随机版本
        IDubboVersionService versionService3=(IDubboVersionService) ctx.getBean("versionService3");
        System.out.println(versionService3.Version());

    }
}