MULTI-THREADED SERVER CLIENT

CHAT MODEL

By: Karan Khare

A2305208514

Cs4-y

AIM OF THE PROJECT

To attain a chat model which can perform many

processes or tasks at same time with very low

halting problem i.e. a Multi-Threaded Server Client

Chat Model.

INTRODUCTION

A networking is a set of devices (often referred to as nodes) connected

by communication links. A node can be a computer, printer, or any other

device capable of sending and/or receiving data generated by other

nodes.

Socket programming is the basis for developing networking applications

it can be done in c, c++, Java etc.

A simple Server Client Chat application is the basics of networking

application.

Here is the Multi-threaded Sever Client Chat Model (An enhanced

version of Simple Server Client Chat Model).

INTRODUCTION CONT…

The Language used for developing the Application is Java.

The Application performs task of sending a message from

one client to another and at the same time receiving the

message from another client with almost no delay of time.

Feature achieved through a very powerful feature of Java

called Multi-Threading.

REQUIREMENTS

Hardware Requirements• Processor: Intel Pentium 2 or higher• Speed: 1GHz +• RAM: 256 MB or Higher• Free Disk Space: Minimum 100 MB of free Disk Space

Network Requirements• The System should Have a Ethernet card or LAN card.• The System Should LAN network (Local Area Network).

Software Requirements• JDK1.2 (Java Development Kit version 1.2) or higher (depending upon the

operating System used)

JRE (Java Runtime Environment)

Operating System: Windows 98 or higher, Linux, Open Solaris, Apple MAC

OS

LANGUAGE ENVIRONMENT

Developed in Java since Java provides already pre-

existing API’s or Application Programming Interface

for networking(Socket Programming), GUI

development, Even Handling, Threading etc.

Thus Java making application development a easy

piece of cake to work upon and develop.

WORKING OF THE APPLICATION

There is a simple Server which accepts request from clients

and provides them connection and handles there chat session.

The Stream Communication Protocol is TCP/IP protocol( a

connection oriented protocol).

CONTINUE…..1

Class Socket implements the client side and the class ServerSocket

class implements the server side of the two-way link. .

The client request the server at some IP address and TCP port

number.

To communicate over a socket connection, I/O streams in Java are

used(performs read/write operations).

CONTINUE…..2

InputStreamReader chained to the socket’s low-level(Connection) Input

Stream withInputStreamreader stream=new InputStreamReader(chatsocket.getInputStream());

InputStreamReader is the ‘bridge’ between a low level byte stream (like the

one coming from the socket) and a high level character stream

BufferedReader

Now Finally chain the BufferedReader to the already chained

InputStreamReaderBufferefReader reader=new BufferedReader(stream);String message=reader.readLine();

CONTINUE…..3

Now to write data to a socket PrintWriter class is used which

has print() and println() method.

With the similar procedure as in reading data PrintWriter is

also chained to the Socket’s low-level (Connection) output-

stream. PrintWriter writer=new PrintWriter(chatSocket.getOutputStream());

Now to write a message we use writer.println(“message to send!”) ;

CONTINUE…..4

Threads in Java are used to make application perform

multiple processes at same time, it doesn’t actually happens

like but appears.

To create a thread we write the statement asThread t=new thread();t.start();

Multi-threading in java means looking at both the thread and

the job that’s run by the thread.

CONTINUE…..5

DEVELOPED APPLICATION

Client A

Server

Client B Client C

DATAFLOW DIAGRAMCreate a stream socket sock

Create a intermediate stream reader for conversion of byte to char

Accept the connection if any for client

Create the client socket sock

Create a stream ServerSocket serversock

Read and write the message simultaneously

Create high Level BufferedReader

Request Server for connection

Create a Thread

Initiate the thread to send and forward message

Client Server

Client Request Approved

CONCLUSION

Finally a Chat system is obtained which can handle

simultaneous tasks like receiving and sending

message at same time with high efficiency and very

low halting problem if many clients are connected

together.

THANKYOU