遠程方法調用(RMI) :Spring通過RmiProxyFactoryBean和RmiServiceExporter支持RMI。 RmiServiceExporter將任何Spring管理的bean導出為RMI服務并進行注冊。 RmiProxyFactoryBean是一種工廠bean,可為RMI服務創建代理。 該代理對象代表客戶端與遠程RMI服務進行通信。
Spring的HTTP調用程序: Spring HTTP調用程序使用標準的Java序列化機制通過HTTP公開服務。 Spring通過HttpInvokerProxyFactoryBean和HttpInvokerServiceExporter支持HTTP調用程序基礎結構。 HttpInvokerServiceExporter,它將指定的服務bean導出為HTTP調用程序服務端點,可通過HTTP調用程序代理訪問。 HttpInvokerProxyFactoryBean是用于HTTP調用程序代理的工廠bean。
Hessian: Hessian提供了一個基于HTTP的二進制遠程協議。 Spring通過HessianProxyFactoryBean和HessianServiceExporter支持Hessian。
粗麻布:粗麻布是Caucho的基于XML的粗麻布替代品。 Spring提供了支持類,例如BurlapProxyFactoryBean和BurlapServiceExporter。
JAX-RPC: Spring通過JAX-RPC(J2EE 1.4的Web服務API)為Web服務提供遠程支持。
JAX-WS: Spring通過JAX-WS(Java EE 5和Java 6中引入的JAX-RPC的繼承者)為Web服務提供遠程支持。
JMS: JmsInvokerServiceExporter和JmsInvokerProxyFactoryBean類提供了Spring中的JMS遠程支持。
讓我們看一下Spring RMI支持以開發Spring RMI Service&Client。
二手技術:
JDK 1.6.0_31
春天3.1.1
Maven的3.0.2
步驟1:建立已完成的專案
創建一個Maven項目,如下所示。 (可以使用Maven或IDE插件來創建它)。

步驟2:圖書館
Spring依賴項已添加到Maven的pom.xml中。
<!-- Spring 3.1.x dependencies -->
<properties><spring.version>3.1.1.RELEASE</spring.version>
</properties><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency>
<dependencies>
步驟3:建立使用者類別
創建一個新的用戶類。
package com.otv.user;import java.io.Serializable;/*** User Bean** @author onlinetechvision.com* @since 24 Feb 2012* @version 1.0.0**/
public class User implements Serializable {private long id;private String name;private String surname;/*** Get User Id** @return long id*/public long getId() {return id;}/*** Set User Id** @param long id*/public void setId(long id) {this.id = id;}/*** Get User Name** @return long id*/public String getName() {return name;}/*** Set User Name** @param String name*/public void setName(String name) {this.name = name;}/*** Get User Surname** @return long id*/public String getSurname() {return surname;}/*** Set User Surname** @param String surname*/public void setSurname(String surname) {this.surname = surname;}@Overridepublic String toString() {StringBuilder strBuilder = new StringBuilder();strBuilder.append("Id : ").append(getId());strBuilder.append(", Name : ").append(getName());strBuilder.append(", Surname : ").append(getSurname());return strBuilder.toString();}
}
步驟4:建立ICacheService介面
創建了代表遠程緩存服務接口的ICacheService接口。
package com.otv.cache.service;import java.util.concurrent.ConcurrentHashMap;import com.otv.user.User;/*** Cache Service Interface** @author onlinetechvision.com* @since 27 Feb 2012* @version 1.0.0**/
public interface ICacheService {/*** Get User Map** @return ConcurrentHashMap User Map*/public ConcurrentHashMap<long, user> getUserMap();}
步驟5:創建CacheService類
CacheService類是通過實現ISchedulerService接口創建的。 它提供對遠程緩存的訪問…
package com.otv.cache.service;import java.util.concurrent.ConcurrentHashMap;import com.otv.user.User;/*** Cache Service Implementation** @author onlinetechvision.com* @since 6:04:49 PM* @version 1.0.0**/
public class CacheService implements ICacheService {//User Map is injected...ConcurrentHashMap<long, user> userMap;/*** Get User Map** @return ConcurrentHashMap User Map*/public ConcurrentHashMap<long, user> getUserMap() {return userMap;}/*** Set User Map** @param ConcurrentHashMap User Map*/public void setUserMap(ConcurrentHashMap<long, user> userMap) {this.userMap = userMap;}}
步驟6:建立IRMIUserService接口
創建代表RMI服務接口的IRMIUserService接口。 另外,它為RMI客戶端提供了遠程方法。
package com.otv.rmi.server;import java.util.List;import com.otv.user.User;/*** RMI User Service Interface** @author onlinetechvision.com* @since 24 Feb 2012* @version 1.0.0**/
public interface IRMIUserService {/*** Add User** @param User user* @return boolean response of the method*/public boolean addUser(User user);/*** Delete User** @param User user* @return boolean response of the method*/public boolean deleteUser(User user);/*** Get User List** @return List user list*/public List<User> getUserList();}
步驟7:創建RMIUserService類
RMIUserService類(又名RMI對象)是通過實現IRMIUserService接口創建的。
package com.otv.rmi.server;import java.util.ArrayList;
import java.util.List;
import org.apache.log4j.Logger;import com.otv.cache.service.ICacheService;
import com.otv.user.User;/*** RMI User Service Implementation** @author onlinetechvision.com* @since 24 Feb 2012* @version 1.0.0**/
public class RMIUserService implements IRMIUserService {private static Logger logger = Logger.getLogger(RMIUserService.class);//Remote Cache Service is injected...ICacheService cacheService;/*** Add User** @param User user* @return boolean response of the method*/public boolean addUser(User user) {getCacheService().getUserMap().put(user.getId(), user);logger.debug("User has been added to cache. User : "+getCacheService().getUserMap().get(user.getId()));return true;}/*** Delete User** @param User user* @return boolean response of the method*/public boolean deleteUser(User user) {getCacheService().getUserMap().put(user.getId(), user);logger.debug("User has been deleted from cache. User : "+user);return true;}/*** Get User List** @return List user list*/public List<User> getUserList() {List<User> list = new ArrayList<User>();list.addAll(getCacheService().getUserMap().values());logger.debug("User List : "+list);return list;}/*** Get RMI User Service** @return IRMIUserService RMI User Service*/public ICacheService getCacheService() {return cacheService;}/*** Set RMI User Service** @param IRMIUserService RMI User Service*/public void setCacheService(ICacheService cacheService) {this.cacheService = cacheService;}
}
步驟8:創建RMIServerStarter類別
RMI服務器啟動程序類已創建。 它啟動RMI服務器。
package com.otv.rmi.server.starter;import org.springframework.context.support.ClassPathXmlApplicationContext;/*** RMI Server Starter** @author onlinetechvision.com* @since 27 Feb 2012* @version 1.0.0**/
public class RMIServerStarter {public static void main(String[] args) {//RMI Server Application Context is started...new ClassPathXmlApplicationContext("rmiServerAppContext.xml");}
}
步驟9:創建rmiServerAppContext.xml
RMI服務器應用程序上下文的內容如下所示。
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsd"><!-- Beans Declaration --><bean id="UserMap" class="java.util.concurrent.ConcurrentHashMap" /><bean id="CacheService" class="com.otv.cache.service.CacheService"><property name="userMap" ref="UserMap"/></bean> <bean id="RMIUserService" class="com.otv.rmi.server.RMIUserService" ><property name="cacheService" ref="CacheService"/></bean><!-- RMI Server Declaration --><bean class="org.springframework.remoting.rmi.RmiServiceExporter"><!-- serviceName represents RMI Service Name --><property name="serviceName" value="RMIUserService"/><!-- service represents RMI Object(RMI Service Impl) --><property name="service" ref="RMIUserService"/><!-- serviceInterface represents RMI Service Interface exposed --><property name="serviceInterface" value="com.otv.rmi.server.IRMIUserService"/><!-- defaults to 1099 --><property name="registryPort" value="1099"/></bean></beans>
步驟10:創建RMIServiceClient類
RMIServiceClient類已創建。 它調用RMI用戶服務并執行用戶操作。
package com.otv.rmi.client;import org.apache.log4j.Logger;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;import com.otv.rmi.server.IRMIUserService;
import com.otv.rmi.server.RMIUserService;
import com.otv.user.User;/*** RMI Service Client** @author onlinetechvision.com* @since 24 Feb 2012* @version 1.0.0**/
public class RMIServiceClient {private static Logger logger = Logger.getLogger(RMIUserService.class);/*** Main method of the RMI Service Client**/public static void main(String[] args) {logger.debug("RMI Service Client is starting...");//RMI Client Application Context is started...ApplicationContext context = new ClassPathXmlApplicationContext("rmiClientAppContext.xml");//Remote User Service is called via RMI Client Application Context...IRMIUserService rmiClient = (IRMIUserService) context.getBean("RMIUserService");//New User is created...User user = new User();user.setId(1);user.setName("Bruce");user.setSurname("Willis");//The user is added to the remote cache...rmiClient.addUser(user);//The users are gotten via remote cache...rmiClient.getUserList();//The user is deleted from remote cache...rmiClient.deleteUser(user);logger.debug("RMI Service Client is stopped...");}
}
步驟11:創建rmiClientAppContext.xml
RMI客戶端應用程序上下文的內容如下所示。
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsd"><!-- RMI Client Declaration --><bean id="RMIUserService" class="org.springframework.remoting.rmi.RmiProxyFactoryBean"><!-- serviceUrl represents RMI Service Url called--><property name="serviceUrl" value="rmi://x.x.x.x:1099/RMIUserService"/><!-- serviceInterface represents RMI Service Interface called --><property name="serviceInterface" value="com.otv.rmi.server.IRMIUserService"/><!-- refreshStubOnConnectFailure enforces automatic re-lookup of the stub if acall fails with a connect exception --><property name="refreshStubOnConnectFailure" value="true"/></bean></beans>
步驟12:運行項目
如果運行RMI Server時啟動了RMI Service Client,則將在RMI Server輸出日志下方顯示。 同樣,可以通過IDE打開兩個單獨的控制臺來運行RMI Server和Client。 :
....
04.03.2012 14:23:15 DEBUG (RmiBasedExporter.java:59) - RMI service [com.otv.rmi.server.RMIUserService@16dadf9] is an RMI invoker
04.03.2012 14:23:15 DEBUG (JdkDynamicAopProxy.java:113) - Creating JDK dynamic proxy: target source is SingletonTargetSource for target object [com.otv.rmi.server.RMIUserService@16dadf9]
04.03.2012 14:23:15 INFO (RmiServiceExporter.java:276) - Binding service 'RMIUserService' to RMI registry: RegistryImpl[UnicastServerRef [liveRef: [endpoint:[192.168.1.7:1099](local),objID:[0:0:0, 0]]]]
04.03.2012 14:23:15 DEBUG (AbstractAutowireCapableBeanFactory.java:458) - Finished creating instance of bean 'org.springframework.remoting.rmi.RmiServiceExporter#0'
04.03.2012 14:23:15 DEBUG (AbstractApplicationContext.java:845) - Unable to locate LifecycleProcessor with name 'lifecycleProcessor': using default [org.springframework.context.support.DefaultLifecycleProcessor@3c0007]
04.03.2012 14:23:15 DEBUG (AbstractBeanFactory.java:245) - Returning cached instance of singleton bean 'lifecycleProcessor'04.03.2012 14:25:43 DEBUG (RemoteInvocationTraceInterceptor.java:73) - Incoming RmiServiceExporter remote call: com.otv.rmi.server.IRMIUserService.addUser
04.03.2012 14:25:43 DEBUG (RMIUserService.java:33) - User has been added to cache. User : Id : 1, Name : Bruce, Surname : Willis
04.03.2012 14:25:43 DEBUG (RemoteInvocationTraceInterceptor.java:79) - Finished processing of RmiServiceExporter remote call: com.otv.rmi.server.IRMIUserService.addUser04.03.2012 14:25:43 DEBUG (RemoteInvocationTraceInterceptor.java:73) - Incoming RmiServiceExporter remote call: com.otv.rmi.server.IRMIUserService.getUserList
04.03.2012 14:25:43 DEBUG (RMIUserService.java:57) - User List : [Id : 1, Name : Bruce, Surname : Willis]
04.03.2012 14:25:43 DEBUG (RemoteInvocationTraceInterceptor.java:79) - Finished processing of RmiServiceExporter remote call: com.otv.rmi.server.IRMIUserService.getUserList04.03.2012 14:25:43 DEBUG (RemoteInvocationTraceInterceptor.java:73) - Incoming RmiServiceExporter remote call: com.otv.rmi.server.IRMIUserService.deleteUser
04.03.2012 14:25:43 DEBUG (RMIUserService.java:45) - User has been deleted from cache. User : Id : 1, Name : Bruce, Surname : Willis
04.03.2012 14:25:43 DEBUG (RemoteInvocationTraceInterceptor.java:79) - Finished processing of RmiServiceExporter remote call: com.otv.rmi.server.IRMIUserService.deleteUser04.03.2012 14:25:43 DEBUG (RemoteInvocationTraceInterceptor.java:73) - Incoming RmiServiceExporter remote call: com.otv.rmi.server.IRMIUserService.getUserList
04.03.2012 14:25:43 DEBUG (RMIUserService.java:57) - User List : []
04.03.2012 14:25:43 DEBUG (RemoteInvocationTraceInterceptor.java:79) - Finished processing of RmiServiceExporter remote call: com.otv.rmi.server.IRMIUserService.getUserList
步驟13:下載
OTV_SpringRMI
參考: Online Technology Vision博客中的JCG合作伙伴 Eren Avsarogullari的Spring Remoting支持和RMI服務開發 。
翻譯自: https://www.javacodegeeks.com/2012/04/spring-remoting-support-and-developing.html