RMI IMPLEMENTATION

Aim:

            To work with distributed environment using rmi concept.

Algorithm:

Step 1: Create a folder inside any drive.

Step 2: Inside the folder create 3 sub folders called server,client,registry.

Step3: Inside the server folder create 2 java programs

1.      Remote interface

2.      Java Class

Step 4: Open 3 command prompt and get inside the paths

1.      Folder_name/client

2.      Folder_name/server

3.      Folder_name/registry

Step 5: In registry command prompt, give command rmiregistry to start registry.

Step 6: Compile the files in server,

1.      Comple interface

2.      Compile class

3.      Create stub class

Step 7: From server folder copy interface class and stub class and paste inside client and registry.

Step 8: create java file inside server to rebind class in registry.

Step 9: create client program in client to lookup the class object from registry.

Step 10: compile and run those two programs.

Server

helloc_Stub.class

helloi.class

client.class

regis.class

Remote Interface:

import java.rmi.*;

public interface helloi extends Remote

{

public String display(String s) throws RemoteException;

}

Class:

import java.rmi.*;

import java.rmi.server.*;

public class helloc extends UnicastRemoteObject implements helloi

{

public helloc() throws RemoteException {}

public String display(String s) throws RemoteException

{

return "saravana "+s;

}

}

Binding in registry:

import java.rmi.*;

import java.rmi.server.*;

import java.rmi.registry.*;

public class regis

{

public static void main(String args[]) throws Exception

{

helloc h=new helloc();

Naming.rebind("saravana",h);

}

}

Client

helloc_Stub.class

helloi.class

client.class

Lookup:

import java.rmi.*;

import java.rmi.server.*;

import java.rmi.registry.*;

public class client

{

public static void main(String args[]) throws Exception

{

helloi h=(helloi)Naming.lookup("Saravana");

System.out.println(h.display("Hai"));

}

}

Registry

helloc_Stub.class

helloi.class

Execution

Registry:        rmiregistry

Server:                        javac helloi.java

                        Javac helloc.java

                        Rmic helloc

                        Javac regis.java

Client             javac client.java

Server             java regis

Client                         java client

Output:

D:\rmi\client>java client

Hai saravana