Struts Tutorials:
Struts2 Tag CheckBoxList
, Checkbox, Iterator, IF
Struts2 Tag Library Example
Struts2 Tiles Example
Struts2 Tiles I18N Example
Struts2 Questions
Struts Tiles I18N Example
Struts Eclipse MVC
Struts2 Tags
Struts2 Example and Tutorial
Struts MVC
Struts2 Validation



Hibernate Tutorials:
Hibernate Case Study
Class Hierarchy Persist Example
Using Hibernate Interceptor
Hibernate Questions with Answer
Hibernate Many-to-Many Mapping Example
Hibernate one-to-many Mapping Example
Hibernate and ORM tools
Spring Hibernate Example
Hibernate SessionFactory Example
Hibernate Mapping Class Hierarchy
Hibernate Questions
Hibernate SessionFactory Questions

Spring Hibernate Example:
Spring Hibernate Case Study

Written By : ISHTEK
Title :
Spring singleton

Description :
Spring Container Example
More...

Written By : ISHTEK
Title :
Spring Features Updates News

Description :
Bringing To Page
More...

Written By : ISHTEK
Title :
Spring Service

Description :
Web Service Example
More...

Written By : ISHTEK
Title :
Spring WebService

Description :
Example Code Discussed
More...

Written By : Amit
Title :
Spring Web MVC

Description :
Example code discussed
More...

Written By : ISHTEK
Title :
Spring Remote Stateless SessionBean

Description :
Calling SessionBean Example code
More...

Written By : ISHTEK
Title :
Spring Local Stateless SessionBean

Description :
Calling Local SessionBean Example code
More...

Written By : guddu
Title :
Struts 2 Spring

Description :
Integration Example and Details
More...

Tags/Keywords : Spring Remoting, Spring Remote, Spring, remote, Java RMI,Questions, Example, Code, Tutorial, Article
Author : Amit
Date (Year/Month/Date): 2009-07-11
SpringFramework Remoting with Java RMI Example

Please be informed that NONE of the design/code from this
page is claiming to be some sort of best practices and we DO NOT expect
any of our visitor/reader of this page to assume this as some sort of
best practice for any context and should not be using this 
as it is without appropriate evaluation to their, so to say, 
specific programming context.

This page intends only to provide bit and piece of known ways  for
doing some sort of example and may not be fit for any other purpose.


Tags : Spring RMI, Java RMI with SpringFramework, RMI Spring 

In this example we are going to see how to use API from SpringFramework
along with RMI (Remote Method Invocation).

This is an extension of an example that is already hosted on this site.



Advertisement : 



Software environment used for this example:
1. Eclipse 3.2
2. JDK 1.5
3. SpringFramework 3.2

We have a Remote interface "ExampleRemote" and an implementation of this
interface "ExampleRemoteObject". One difference is that this implementation
class "ExampleRemoteObject" is not extending UnicastRemoteObject class from
java.rmi package, but still it can be exported to the rmiregistry.

Let us look at the basic classes, an Interface and an implementation class,
as follows:
ExampleRemote.java

package example;

import java.rmi.Remote;
import java.rmi.RemoteException;

public interface ExampleRemote extends Remote {
  public String test() throws RemoteException;
}



ExampleRemoteObject.java

package example;

import java.rmi.RemoteException;

public class ExampleRemoteObject implements ExampleRemote {

  public String test() throws RemoteException {
    System.out.println("inside remote method test...");
    return "from test method";
 }
}



The main program that uses applicationContext.xml file and SpringFramework
API to load beans, as follows:
TestClient.java

package example;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestClient {

  public TestClient() {
    try {
      ClassPathXmlApplicationContext ctx = 
	     new ClassPathXmlApplicationContext(
		                new String[] {"applicationContext.xml"});
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }
  /**
   * @param args
   */
  public static void main(String[] args) {
      new TestClient();
  }
}



Spring configuration file "applicationContext.xml" file, as under:


<?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="rmiservice" class="example.ExampleRemoteObject">
  </bean>
  <bean id="rmiserviceexporter" class="org.springframework.remoting.rmi.RmiServiceExporter">
    <property name="service" ref="rmiservice"/>
    <property name="registryHost" value="localhost"/>
    <property name="registryPort" value="1099"/>		
    <property name="serviceName" value="exampleremote"/>		
  </bean>
</beans>



Before running this TestClient, %JAVA_HOME%\bin\rmiregistry.exe file has to be
running, and before running rmiregistry.exe, classpath should be set to include
the class files example.ExampleRemote.

As you might have noticed that the rmiserviceexporter bean is using 
RmiServiceExporter class from Spring Framework API, so this bean
requires host, port and the service name along with the service implementing
class/bean reference, as shown above.

So basically we need three different command prompts, one for the rmiregistry
the second one for the TestClient to bind this service to the RMI registry
and the third one is another client (command line main program), that could use
Spring API to call this service "exampleremote".

This main program is as shown below:
Client.java

package example;

import java.rmi.NotBoundException;
import java.rmi.RemoteException;
import java.rmi.registry.Registry;
import java.rmi.registry.LocateRegistry;

import org.springframework.beans.BeansException;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.remoting.rmi.RmiClientInterceptor;
import org.springframework.remoting.rmi.RmiProxyFactoryBean;

public class Client {
	
    public Client() {
      try {
        ClassPathXmlApplicationContext ctx = 
		                   new ClassPathXmlApplicationContext(
						   new String[] {"applicationContextClient.xml"});
        ExampleRemote exampleR = (ExampleRemote) (ctx.getBean("rmiClient"));
        System.out.println(exampleR.test());
      } catch (BeansException e) {
        e.printStackTrace();
      } catch (RemoteException e) {
        e.printStackTrace();
      }
    }
    
    public static void main(String[] args) {
      new Client();
    }
}



The configuration XML file, the above program requires as follows:
applicationContextClient.xml

<?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="rmiClient" class="org.springframework.remoting.rmi.RmiProxyFactoryBean">
    <property name="serviceInterface" value="example.ExampleRemote"/>
    <property name="serviceUrl" value="rmi://localhost:1099/exampleremote"/>
  </bean>
</beans>





Advertisement : 



This example uses Spring Remoting feature and API for using RMI
from Java Technology.
If you have any comments/questions/suggestions , please write those
here in this Page.
Thanks.

Author of this article/writeup has expressed his/her willingness
to help or guide users with any technical difficulties he/she faces
while working with the example code environment setting up, running
and resolving any such exception raised during compile or at runtime.
You may ask for any technical doubt or seek technical help related to
this article by using following form to reach for technical help
from the Author for FREE.

This article's Author shall be reading your request and responding
within reasonable time (no resolution timeframe defined as such).

Copyright © 2008-2009, Interview-Questions-Tips-Forum, All Rights Reserved.