Spring RMI的應用

利用Spring來實現RMI,不用實現remote接口,也不用調用rmic編譯stub和skeleton,
服務端可以定義org.springframework.remoting.rmi.RmiServiceExporter類完成RMI服務器實現.
客戶端只要定義org.springframework.remoting.rmi.RmiProxyFactoryBean,告知rmi的url和接口

服務器實現:
接口:
IHello.java
package com.callan.Test;

public interface IHello {
 public String hello(String name);
}

 

HelloImp.java

package com.callan.Test;

public class HelloImp implements IHello{
 public String hello(String name){
  return "hello:" + name;
 }
}

 

服務端spring的配置:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

 <bean id="helloService" class="com.callan.Test.HelloImp"/>
 
 <bean id="serviceExporter" class="org.springframework.remoting.rmi.RmiServiceExporter">
  <property name="service">
   <ref bean="helloService"/>
  </property>
  <!-- 定義服務名 -->
  <property name="serviceName">
   <value>hello</value>
  </property>
  <property name="serviceInterface">
   <value>com.callan.Test.IHello</value>
  </property>
  <property name="registryPort">
            <value>8888</value>
        </property>
 </bean>
</beans>

 

客戶端:

必須把服務端的IHello.class文件放到客戶端一份

 

接下來看看客戶端要如何實作，只要透過org.springframework.remoting.rmi.RmiProxyFactoryBean，並告知服務的URL、代理的接口即可，就好像在使用本地端管理的服務一樣：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

 <bean id="serviceClient"
  class="org.springframework.remoting.rmi.RmiProxyFactoryBean">
  
  <property name="serviceInterface">
   <value>com.callan.Test.IHello</value>
  </property>
  <!-- serviceUrl以rmi開頭,定義服務器地址與端口和服務名 -->
  <property name="serviceUrl">
   <value>rmi://localhost:8888/hello</value>
  </property>
 </bean>
</beans>

 

客戶端的調用

package com.callan.Test;

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

public class RMIClient {

 public static void main(String[] args) {
  ApplicationContext content = new new ClassPathXmlApplicationContext("com/config/applicationContext.xml");
  
  IHello iHello = (IHello)content.getBean("serviceClient");
  
  System.out.println(iHello.hello("callan"));
 }
}