implement RPC(Remote Procedure Call)

Aim:

To write a java program to implement RPC (remote procedure call)

Algorithm :

Step 1: start the program.

Step 2: include the necessary packages in java. 

Step 3: create an interface as ucet and extends the predefined interface remote into it.

Step 4: declare the remote methods inside the interface used.

Step 5: declare the class rpc and extends the predefined class.

Step 6: unicast remote object an implement the interface ucet into it.

Step 7: declare the class server &create an object ob for the class rpc.

Step 8: declare the class client

Step 9: call the remote methods using the object ob which is the object of the interface ucet.

Step 10: the remote method contains the methods such as functions(a,b),power(a,b)and log(a).

Step 11:Stop the program.

Program:

Client:

import java.rmi.*;

import java.io.*;

import java.rmi.server.*;

public class clientrpc

{

public static void main(String arg[])

{

try

{

String serverurl="rmi://localhost/serverrpc";

ucet ob=(ucet) Naming.lookup(serverurl);

int r=ob.function(10,5);

System.out.println("the answer of(a+b)^2 is:"+r);

int t =ob.power(10,5);

System.out.println("the answer of(a)^(b) is:"+t);

double d=ob.log(10);

System.out.println("the log value of the given number "+10+" is :"+d);

}

catch(Exception e)

{

System.out.println("error.."+e.getMessage());

}

}

}

Server:

import java.rmi.*;

import java.rmi.server.*;

public class serverrpc

{

public static void main(String arg[])

{

try

{

rpc ob=new rpc();

Naming.rebind("serverrpc",ob);

}

catch(Exception e)

{

}

}}

RPC:

import java.rmi.*;

import java.lang.Math.*;

import java.rmi.server.*;

public class rpc extends UnicastRemoteObject implements ucet

{

public rpc()throws Exception

{

}

public int function(int a,int b)throws RemoteException

{

int m;

m=(a*a)+(b*b)+(2*a*b);

return m;

}

public int power(int a,int b)throws RemoteException

{

int m=(int)Math.pow(a,b);

return m;

}

public double log(int a)throws RemoteException

{

return(Math.log(a));

}

}

Ucet:

import java.rmi.*;

public interface ucet extends Remote

{

public int function(int a,int b)throws RemoteException;

public int power(int a,int b)throws RemoteException;

public double log(int a)throws RemoteException;

}

Output:

Javac ucet.java

Start rmiregistry

Javac rpc.java

rmi rpc

javac clientrpc.java

javac serverrpc.java

javac rpc.java

javac ucet.java

javac serverrpc.java

java serverrpc

javac clientrpc.java

java clientrpc

the ans of (a+b)^2 is:225

the ans of (a)^(b) is :100000

the log value of the given number 10 is 2.30258