Write an Remote Method Invocation Program for Object Serialization.

Aim: - Write an RMI Program for serialization.

Tools: - NetBeans IDE, jdk

Theory:-

Ø  Serialization is the process of converting an object into a sequence of bits so that it can be persisted on a storage medium (such as a file, or a memory buffer) or transmitted across a network connection link.

Ø  When the resulting series of bits is reread according to the serialization format, it can be used to create a semantically identical clone of the original object. For many complex objects, such as those that make extensive use of references, this process is not straightforward.

Ø  This process of serializing an object is also called deflating or marshalling an object.

Ø  The opposite operation, extracting a data structure from a series of bytes, is deserialization (which is also called inflating or unmarshalling).

 

Advantages Of Object Serialization:

 

Ø  A method of persisting objects which is more convenient than writing their properties to a text file on disk, and re-assembling them by reading this back in.

Ø  A method of issuing remote procedure calls, e.g., as in SOAP

Ø  Amethod for distributing objects, especially in software componentry such as COM, CORBA, etc.

Ø  A method for detecting changes in time-varying data.

 

Program:-

 

Interface:-

import java.io.Serializable;

public class DemoInterface implements Serializable {

    int rno;

    String name;

    Double per;   

    DemoInterface(int r,String n,double p){

        rno=r;

        name=n;

        per=p;

    }   

    public String toString(){

        return "\nStudent Record: \n" + "\nRollno : "+rno+"\nName: "+name+"\nPercentage: "+per;

    }}

DemoSerial:-

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

public class DemoSerial {

    public static void main(String[] args) {

        try{

        DemoInterface di = new DemoInterface(101,"Richard Smith",50.90);

         System.out.println(di);

        System.out.println("\nObject is Serializing.");

        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("serializing"));       

        oos.writeObject(di);

        System.out.println("\nObject is Serialized");

        oos.flush();

        oos.close();             

        }

        catch(Exception e){

            System.out.println("\nException in Serializing:"+e);

        }

        try{

            DemoInterface di1;

            System.out.println("\nObject is DeSerializing.");

            ObjectInputStream ois = new ObjectInputStream(new FileInputStream("serializing"));

            di1=(DemoInterface)ois.readObject();

            ois.close();

            System.out.println("\nObjec is Deserialized");

            System.out.println("\nDesirialized Output is: \n"+di1);           

        }

        catch(Exception ei){

            System.out.println("\nException in DeSerializing:"+ei);

        }             

    }

}

Output:-