RPC and RMI operation in java

Client

import java.io.*;

import java.net.*;

import java.util.*;

class Clientrpc

{

            public static void main(String args[])

            {

            try

            {

                        BufferedReader in=new BufferedReader(new InputStreamReader(System.in));

                        Socket clsct=new Socket("127.0.0.1",139);

                        DataInputStream din=new DataInputStream(clsct.getInputStream());

                        DataOutputStream dout=new DataOutputStream(clsct.getOutputStream());

                        System.out.println("Enter String");

                        String str=in.readLine();

                        dout.writeBytes(str+'\n');

                        clsct.close();

            }

            catch (Exception e)

            {

            System.out.println(e);

            }

            }

}

Server

import java.io.*;

import java.net.*;

import java.util.*;

class Serverrpc

{

            public static void main(String args[])

            {

            try

            {

                        ServerSocket obj=new ServerSocket(139);

                        while(true)

                        {

                                    Socket obj1=obj.accept();

                                    DataInputStream din=new DataInputStream(obj1.getInputStream());

                                    DataOutputStream dout=new DataOutputStream(obj1.getOutputStream());

                                    String str=din.readLine();

                                    Process p=Runtime.getRuntime().exec(str);

                        }

            }

            catch(Exception e)

            {

                        System.out.println(e);

            }

            }

}

OUTPUT

Server

Y:\networks\remote>java Serverrpc

Client

Y:\networks\remote>java Clientrpc

Enter String

calc

Rmi

Client

import java.rmi.Naming;

import java.rmi.RemoteException;

import java.net.MalformedURLException;

import java.rmi.NotBoundException;

import java.rmi.*;

import java.net.*;

class clirmi

  {

 

     public static void main(String args[])

{

         try

           {

              calc o= new calcim();

            Naming.lookup("rmi://165.165.1.1/calculatoroperation");

               System.out.println("Addition:"+o.add(4,5));

               System.out.println("Subtraction:"+o.sub(7,5));

            System.out.println("Multiplication:"+o.mul(4,5));

             System.out.println("Division:"+o.div(10,5));

              }

   catch (Exception e)

         {

            System.out.println(e);

        }

       

    }

   }

Server

Interface

public interface calc extends java.rmi.Remote

  {

    public long  add(long a,long b) throws java.rmi.RemoteException;

    public long  sub(long a,long b) throws java.rmi.RemoteException;

    public long  mul(long a,long b) throws java.rmi.RemoteException;

    public long  div(long a,long b) throws java.rmi.RemoteException;

  }

Implementation of interface

import java.rmi.Naming;

import java.rmi.RemoteException;

import java.net.MalformedURLException;

import java.rmi.NotBoundException;

class calcim extends java.rmi.server.UnicastRemoteObject implements calc

  {

     public calcim() throws  java.rmi.RemoteException

        {

           super();

         }

     public  long add( long a,long b) throws  java.rmi.RemoteException

       {

           return (a+b);

        }

       public long  sub( long a,long b) throws  java.rmi.RemoteException

       {

           return (a-b);

        }

 public  long mul( long a,long b) throws  java.rmi.RemoteException

       {

           return (a*b);

        }

 public long div( long a,long b) throws  java.rmi.RemoteException

       {

           return (a/b);

        }

 }

Main file

import java.rmi.Naming;

import java.rmi.RemoteException;

import java.net.MalformedURLException;

import java.rmi.NotBoundException;

import java.rmi.*;

import java.net.*;

public class serrmi

  {

      serrmi()

        {

           try{

                  calc ob=new calcim();

                 Naming.rebind("rmi://165.165.1.13/calculatoroperation",ob);

               }

           catch(Exception e)

               {

                }

        }

       public static void main(String args[])

          {

            new serrmi();

          }

   } 

Output

D:\Java\jdk1.5.0_05\bin>javac serrmi.java

D:\Java\jdk1.5.0_05\bin>javac calc.java

D:\Java\jdk1.5.0_05\bin>javac calcim.java

D:\Java\jdk1.5.0_05\bin>rmic -verbose serrmi

[loaded .\serrmi.class in 15 ms]

[loaded D:\Java\jdk1.5.0_05\jre\lib\rt.jar(java/lang/Object.class) in 15

[loaded D:\Java\jdk1.5.0_05\jre\lib\rt.jar(java/rmi/Remote.class) in 0 ms

[loaded D:\Java\jdk1.5.0_05\jre\lib\rt.jar(java/lang/Exception.class) in

[loaded D:\Java\jdk1.5.0_05\jre\lib\rt.jar(java/lang/Throwable.class) in

[loaded D:\Java\jdk1.5.0_05\jre\lib\rt.jar(java/io/Serializable.class) in

[loaded D:\Java\jdk1.5.0_05\jre\lib\rt.jar(java/rmi/RemoteException.class

ms]

[loaded D:\Java\jdk1.5.0_05\jre\lib\rt.jar(java/io/IOException.class) in

error: Class serrmi does not implement an interface that extends java.rmi

; only remote objects need stubs and skeletons.

1 error

[done in 266 ms]

D:\Java\jdk1.5.0_05\bin>start rmiregistry

D:\Java\jdk1.5.0_05\bin>java serrmi

Client

D:\Java\jdk1.5.0_05\bin>javac clirmi.java

D:\Java\jdk1.5.0_05\bin>java clirmi

Addition:9

Subtraction:2

Multiplication:20

Division:2