ChatApp BackEnd

This is the backend service for a real-time messaging application built with Java Spring Boot. It provides a robust, scalable, and secure API for handling user authentication, message transmission, and persistence using PostgreSQL and Apache Kafka.

Features

• User Management: Registration, authentication, and profile management.
• Real-Time Messaging: Supports both RESTful and WebSocket communication.
• Message Queueing: Utilizes Apache Kafka for efficient message delivery.
• Database Storage: Uses PostgreSQL for data persistence.
• Security: Implements Spring Security for authentication and access control.
• Scalability: Supports Docker for containerization and deployment.
• Testing: Ensures reliability with JUnit-based test coverage.

Technologies Used

• Java 23
• Spring Boot (Spring Web, Spring Security, Spring Data JPA, Spring WebSocket)
• Apache Kafka
• PostgreSQL
• Docker
• JUnit

Getting Started

Prerequisites

Ensure you have the following installed:

• Java 17+
• PostgreSQL
• Apache Kafka
• Docker (optional for containerization)

Installation & Running

1. Clone the repository:

   git clone https://github.com/IsmailTekin05/ChatAppBackEnd.git
   cd ChatAppBackEnd

2. Configure the application.properties file with your PostgreSQL and Kafka settings.
3. Build and run the application:

   ./mvnw spring-boot:run

4. The API will be available at http://localhost:8080.

API Endpoints

Method	Endpoint	Description
POST	/register	Register a new user
POST	/login	Authenticate a user
GET	/messages/{userId}	Fetch messages for a user
POST	/messages/send	Send a new message

Contributing

Contributions are welcome! Feel free to fork the repository and submit pull requests.

License

This project is licensed under GPL-3.0 license.