Flight Tracker System ️🛫

Welcome to the backend architecture of the Flight Tracker System! This repository hosts a robust, scalable, and SOLID-compliant API designed for flight tracking, booking management, and SkyWallet financial operations.

🚀 Key Features

• ✈️ Flight Management: Real-time flight tracking, occupancy-based dynamic pricing, and captain assignments.
• 💳 SkyWallet: Integrated digital wallet for secure ticket purchases and fund management.
• 🛡️ Secure Auth: JWT-based stateless authentication with role-based access control (RBAC).
• 🏷️ Smart Booking: Automatic PNR generation and real-time seat map management.
• 🔔 Notification System: Automated notifications for flight status updates and booking confirmations.
• 🌤️ Weather Integration: Interface-driven weather data for flight planning.

🛠️ Technology Stack

• Core: Java 17+, Spring Boot 3.x
• Security: Spring Security, JWT (JJWT)
• Data: Spring Data JPA, Hibernate, PostgreSQL
• Tooling: Maven, Lombok, Jakarta Validation
• Architectural Patterns: SOLID Principles, Rich Domain Models (DDD), Modular Services.

🏗️ Architecture Overview

The project underwent a significant architectural upgrade to ensure modularity and scalability:

• Rich Domain Model: Business logic is encapsulated within Entities (User.chargeBalance(), Flight.incrementOccupancy()), adhering to the "Tell, Don't Ask" principle.
• Interface Segregation: Specialized services (IPricingService, IPnrService, ISecurityService) handle cross-cutting concerns.
• Global Error Handling: Centralized exception management with detailed causal diagnostics.
• Thin Controllers: Controllers focus solely on HTTP orchestration, delegating all logic to the service layer.

🏁 Getting Started

Prerequisites

• JDK 17 or higher.
• Maven.
• PostgreSQL (or any JPA-compatible database).

Configuration

Update the src/main/resources/application.properties with your credentials:

spring.datasource.url=jdbc:postgresql://localhost:5432/flight_tracker
spring.datasource.username=your_username
spring.datasource.password=your_password

security.jwt.secret-key=your_secret_64_bit_key
security.jwt.expiration=86400000 # 24 hours

Running the App

# Build the project
./mvnw clean install

# Run the application
./mvnw spring-boot:run

📄 Documentation

• API Documentation: Detailed endpoint listings and sample payloads.
• Postman Collection: Importable collection for quick testing.

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Developed by Berat Zengin with a focus on clean code and software excellence. 🚀