Flight Management System

A Java + Spring Boot practice project focused on clean OOP design and REST API development. It models a flight management domain with immutable entities and exposes endpoints to query and create flights.

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Tech Stack

Layer	Technology
Language	Java 17
Framework	Spring Boot 3.2
Persistence	Spring Data JPA + H2 (in-memory)
Build	Maven
Utilities	Lombok
Test Coverage	JaCoCo

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Key Design Decisions

• Immutable entities — domain objects are designed to be immutable to avoid unintended state mutation.
• Clean domain model — clear separation between the domain layer and REST layer.
• In-memory database — uses H2 so the project runs out of the box with no external setup.

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Getting Started

Prerequisites

• Java 17+
• Maven 3.8+

Run the application

git clone https://github.com/thomaswillix/flight-management-system.git
cd flight-management-system
mvn spring-boot:run

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

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API Endpoints

Method	Endpoint	Description
GET	/flights	Get all flights
GET	/flights/{id}	Get a flight by ID
POST	/flights	Create a new flight

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Running Tests

mvn test

JaCoCo generates a coverage report after tests run:

target/site/jacoco/index.html

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Project Structure

src/
└── main/
    └── java/nivelacion/spring/
        ├── Application.java
        ├── domain/          # Immutable domain entities
        ├── repository/      # JPA repositories
        └── controller/      # REST controllers