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1. Client-Server Communication: Understanding TCP, HTTP, and DNS for efficient data exchange. 2. Operating System Integration: Integrating sockets with OS for connection management. 3. Server Architecture: Comparing single-threaded vs. multithreaded servers for concurrency. 4. Thread Pools: Utilizing thread pools for optimized resource allocation

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KulkarniShrinivas/Multithreaded-WebServer

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Multithreaded Web Server

Introduction

This project implements a multithreaded web server capable of handling multiple concurrent client requests efficiently. It leverages thread pools to manage resources effectively and demonstrates key concepts such as client-server communication, TCP sockets, and multithreading.


Features

  • Multithreaded Server: Handles multiple client requests simultaneously.
  • Thread Pool Implementation: Optimizes server performance by reusing threads.
  • TCP Communication: Ensures reliable data transfer between the client and server.
  • Scalable Design: Supports concurrent connections with controlled resource usage.
  • Client Simulation: Generates multiple client requests to test server performance.

Concepts Covered

1. Client-Server Architecture

  • The server listens on a specified port and handles incoming requests from multiple clients.
  • The client establishes a connection to the server, sends a request, and receives a response.

2. TCP Communication

  • Uses TCP for reliable, ordered, and error-checked communication.
  • Demonstrates the TCP three-way handshake for establishing a connection.

3. HTTP Simulation

  • Implements basic server responses similar to HTTP protocols.
  • Simulates the behavior of HTTP 1.0 (non-persistent) and HTTP 1.1 (persistent) connections.

4. Sockets

  • Utilizes Java's Socket and ServerSocket classes for network communication.
  • Demonstrates socket operations: opening, listening, accepting, reading, and writing.

5. Multithreaded Design

  • Processes each client request in a separate thread.
  • Uses ExecutorService to manage threads efficiently via a thread pool.

Code Structure

Server

The server code:

  • Listens for incoming connections on a specified port (default: 8010).
  • Uses a thread pool to process each client request concurrently.
  • Responds to each client with a greeting message.

Client

The client code:

  • Simulates multiple clients using a thread pool.
  • Each thread represents a client connecting to the server, sending a request, and receiving a response.

Usage

1. Prerequisites

  • Java Development Kit (JDK) installed (version 8 or higher).
  • Basic understanding of Java and networking concepts.

2. Running the Server

  1. Compile the Server.java file:
    javac Server.java
  2. Run the server:
    java Server
  3. The server will start listening for connections on port 8010.

3. Running the Client

  1. Compile the Client.java file:
    javac Client.java
  2. Run the client:
    java Client
  3. The client will simulate multiple requests to the server.

How It Works

Server Workflow

  1. Listens on a specified port for incoming client connections.
  2. Accepts client connections and assigns each to a thread from the thread pool.
  3. Processes the client request and sends a response.
  4. Closes the client connection after communication.

Client Workflow

  1. Establishes a connection to the server.
  2. Sends a request to the server.
  3. Waits for and processes the server's response.
  4. Closes the connection.

Advantages of Multithreaded Servers

  • Concurrency: Handles multiple clients simultaneously without blocking.
  • Efficiency: Reuses threads from a thread pool, reducing overhead.
  • Scalability: Supports a large number of concurrent connections.

Performance Testing

You can test the server's performance by adjusting the following:

  • Number of client threads in the Client class.
  • Size of the thread pool in the Server class.

Example:

  • Increase numberOfClients in the client to simulate a higher load.
  • Change poolSize in the server to observe resource management under varying loads.

Conclusion

This project demonstrates a scalable and efficient multithreaded web server design. It provides hands-on experience with networking, sockets, and multithreading in Java. Thread pools ensure optimal resource utilization, making this implementation suitable for real-world applications.

About

1. Client-Server Communication: Understanding TCP, HTTP, and DNS for efficient data exchange. 2. Operating System Integration: Integrating sockets with OS for connection management. 3. Server Architecture: Comparing single-threaded vs. multithreaded servers for concurrency. 4. Thread Pools: Utilizing thread pools for optimized resource allocation

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