This Java application demonstrates a simple client-server architecture for communication over a TCP network socket. The project consists of three components: TCPServer, TCPClient, and ClientHandler.

• Java 17 or later
• JUnit (for running tests)
• maven 3

1. Compile the Code: Ensure that all Java source files are successfully compiled maven mvn clean install or using javac .

2. Run the Server (TCPServer):

   • Please note : TCPServer is configured to run on localhost (127.0.0.1) and port is 8080
   • Simple way to run the application is from IDE, right click on TCPServer class and run it will launch Server terminal.
   • OR
   • Open a terminal.
   • Navigate to the directory where TCPServer.java is located.
   • Run the TCPServer class with the desired port number as an argument. For example, to run the server on port 12345, use the following command:

     java TCPServer 8080
     

3. Run the Client (TCPClient):

   • Simple way to run the application is from IDE, right click on TCPClient class and run it will launch Client terminal and start testing.
   • OR
   • Open another terminal.
   • Navigate to the directory where TCPClient.java is located.
   • Run the TCPClient class.
   • Or from IDE right click and run TCPClient

4. Interact with the Client:

   • Once the TCPClient is running, you can interact with it by entering messages in the client terminal.
   • Type a message and press Enter. The message will be sent to the server.
   • You will receive responses from the server, and the round trip time and throughput rate will be displayed.

5. To Exit the Client: Type "exit" and press Enter to quit the client.

6. To Stop the Server: You can stop the server by terminating the server terminal.

• TCPServer.java: The server application that listens for incoming connections on a specified port and echoes messages back to clients.

• TCPClient.java: The client application that establishes a connection to the server and sends messages to it. It also calculates and displays round trip times and throughput rates.

• ClientHandler.java: The class that handles communication between the server and clients. It runs as a separate thread to handle multiple clients concurrently.

• application.properties: Configuration file for specifying server address, port, and other properties. Update this file as needed.

The project includes JUnit test classes for the ClientHandler, TCPServer, and TCPClient components. You can run these tests to verify the functionality of the code.