spring 对java RMI 的支持

spring 对Java 传统RMI 的支持。 
首先创建一个接口和一个实现类 
接口源代码

package net.oschina.rpc;public interface Service {    int add(int x, int y);}
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实现类源代码

package net.oschina.rpc;public class ServiceImp  implements Service {    public int add(int x, int y) {        return x+y;    }}
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然后分别创建 server 端和client 端的配置文件。

server 端配置文件

?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:context="http://www.springframework.org/schema/context"    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd                      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd                      http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd                      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">    <bean id="serviceExporter" class="org.springframework.remoting.rmi.RmiServiceExporter">        <property name="serviceName" value="service" />        <property name="service" ref="service" />        <property name="serviceInterface" value="net.oschina.rpc.Service" />        <property name="registryPort" value="8080" />        <property name="servicePort" value="8088" />    </bean>    <bean id="service" class="net.oschina.rpc.ServiceImp" /></beans>
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客户端配置文件

<?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:context="http://www.springframework.org/schema/context"    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd                      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd                      http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd                      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">    <bean id="testService" class="org.springframework.remoting.rmi.RmiProxyFactoryBean">        <property name="serviceUrl" value="rmi://192.168.31.177:9090/service" />        <property name="serviceInterface" value="net.oschina.rpc.Service" />    </bean></beans>
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启动 server 源代码

package net.oschina.rpc;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class RmiServer {    public static void main(String[] args) throws InterruptedException {        ApplicationContext context = new ClassPathXmlApplicationContext("rmi-server.xml");    }}
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客户端调用

package net.oschina.rpc;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class RmiClient {    public static void main(String[] args) {        ApplicationContext context = new ClassPathXmlApplicationContext("rmi-client.xml");        Service client = context.getBean(Service.class);        System.out.println(client.add(5, 8));    }}
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正确绑定会看到日志：

[springModel][INFO] [2017-06-07 00:42:58] org.springframework.remoting.rmi.RmiServiceExporter.getRegistry(394) | Looking for RMI registry at port ‘9090’ 
[springModel][INFO] [2017-06-07 00:42:59] org.springframework.remoting.rmi.RmiServiceExporter.getRegistry(405) | Could not detect RMI registry - creating new one 
[springModel][INFO] [2017-06-07 00:42:59] org.springframework.remoting.rmi.RmiServiceExporter.prepare(277) | Binding service ‘service’ to RMI registry: RegistryImpl[UnicastServerRef [liveRef: [endpoint:192.168.31.177:9090,objID:[0:0:0, 0]]]]

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spring 简化了 RMI 服务的发布，可以很容易的发布RMI服务。