Features

• Implements a concurrent TCP-based architecture where multiple clients can connect and communicate simultaneously;
• All client–server interactions are encrypted using generated SSL certificates, ensuring message privacy and authentication;
• Supports user registration, login, and session management with credential verification for secure access;
• Users can create, join, and leave chat rooms, enabling organized group conversations;
• Includes special chat rooms connected to Ollama, allowing users to interact with a local LLM;
• Uses Java 21 virtual threads for lightweight, highly scalable concurrency;
• Clients interact through commands.

Screenshots

User pedro registration

User login and room creation

User mariana enters the same room

How to run the project

Step 1:

• Open the first terminal and run the command javac server/*.java client/*.java;

Step 2:

• In the first terminal and run the command java server.ServerMain;

Step 3:

• Open a second terminal and run the command ollama serve;

Step 4:

• Open a third terminal and run the command java client.ChatClient;
• After running the third command, you will be able to start the project, and a welcome message will be displayed, followed by login and registration options.

Step 5 (optional):

• You can open a new terminal and run the same command from Step 3 to login (or register) as a new user. If you choose to enter the same room as the user from Step 3, you will be able to chat!

Project Commands:

/rooms to list all rooms available; /leave to leave a room and return to room selection; /exit to exit the application.

Authors

• Lara Cunha (up202108876)
• Pedro Camargo (up202102365)