📚 Learning Management System (LMS)

A complete Learning Management System built with Java 21 & Spring Boot, designed to manage courses, users (students / teachers), groups, communities, assignments, submissions, and content. This project demonstrates clean architecture, modular design, role-based access control, JWT authentication, and production-ready backend practices.

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🧩 Modules & Responsibilities

1️⃣ User Management Module

Purpose: Manage users and their roles.

Responsibilities:

• Register and authenticate users (Student, Teacher, Admin)
• Issue and validate JWT tokens
• Enforce role-based access control on APIs
• Manage user profiles and basic account data

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2️⃣ Course Management Module

Purpose: Handle the lifecycle of courses.

Responsibilities:

• Create, update, and delete courses
• Assign instructors/teachers to courses
• Manage course categories, tags, and metadata
• Expose paginated and sortable course listings

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3️⃣ Assignment & Submission Module

Purpose: Support teaching and evaluation workflow.

Responsibilities:

• Allow teachers to create assignments with deadlines and instructions
• Allow students to submit assignments (file or text)
• Track submission history and versions
• Record grades and feedback for each submission
• Provide assignment listings by course or student

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4️⃣ Content Management Module

Purpose: Store and serve learning materials.

Responsibilities:

• Upload and manage course resources (videos, documents, notes, etc.)
• Store files locally or in cloud storage (Cloudinary / S3, if configured)
• Provide secure and controlled file download / access
• Optionally generate signed URLs for protected content

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5️⃣ Notification Module

Purpose: Notify users about important events.

Responsibilities:

• Send email notifications for:
  • New course enrollment
  • Upcoming or overdue assignment deadlines
  • Grades or feedback published
• Provide a pluggable notification mechanism for future channels

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6️⃣ Group Management Module

Purpose: Organize students into groups for collaboration or administration.

Responsibilities:

• Create, update, and delete groups
• Assign students to groups
• Associate group-specific resources or activities
• Support group-based visibility or access rules where needed

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7️⃣ Community Management & Chat Module

Purpose: Provide community spaces around topics or institutions.

Responsibilities:

• Create, update, and delete communities
• Attach courses, groups, and content to each community
• Provide a real-time web chat endpoint (WebSocket) for each community

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8️⃣ Security & Authentication Module

Purpose: Protect the API and data.

Responsibilities:

• JWT-based authentication (login, token validation)
• Spring Security configuration (filters, authentication providers)
• Method-level authorization using annotations ()
• Password encoding and secure credential handling

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9️⃣ Persistence & Data Access Layer

Purpose: Interact with the database in a clean, abstracted way.

Responsibilities:

• Use Spring Data JPA repositories for entities like User, Course, Assignment, Submission, Group, Community, etc.
• Define query methods with pagination and sorting support
• Encapsulate ORM logic and mapping between entities and DTOs
• Support projections for optimized read queries

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🛠️ Tech Stack

Component	Technology
Backend	Java 21, Spring Boot
Security	Spring Security, JWT
Database	PostgreSQL
ORM	Hibernate, Spring Data JPA
Documentation	Swagger / OpenAPI, Insomnia
Build Tool	Maven
Storage	Local filesystem / Cloudinary
Real-time	WebSocket (Spring), STOMP / Socket.IO

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📁 Project Structure

LearningManagementSystem ├── .idea ├── .mvn ├── logstash ├── src │ └── main │ ├── java │ │ └── com │ │ └── maven │ │ └── neuto │ │ ├── annotation │ │ ├── aspect │ │ ├── config │ │ ├── controller │ │ ├── enum │ │ ├── exception │ │ ├── mapstruct │ │ ├── model │ │ ├── payload │ │ ├── repository │ │ ├── security │ │ ├── service │ │ ├── serviceImplement │ │ ├── utils │ │ └── NeuApplication.java │ └── resources │ ├── static │ ├── templates │ │ └── email │ ├── application.yml │ ├── application-dev.yml │ ├── application-prod.yml │ ├── logback-spring.xml │ └── messages │ ├── messages_en.properties │ └── messages_bn.properties └── pom.xml

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⚙️ Setup Instructions

1. Clone

git clone https://github.com/Mahi12333/Learning-Management-System.git
cd Learning-Management-System

2. Environment variables

Create a .env or set system environment variables used by application.yml:

SPRING_DATASOURCE_URL=jdbc:mysql://localhost:3306/lms
SPRING_DATASOURCE_USERNAME=root
SPRING_DATASOURCE_PASSWORD=your-password
JWT_SECRET=your_jwt_secret_key_here
CLOUDINARY_URL=cloudinary://api_key:api_secret@cloud_name   # optional

3. application.yml (example)

spring:
  datasource:
    url: ${SPRING_DATASOURCE_URL}
    username: ${SPRING_DATASOURCE_USERNAME}
    password: ${SPRING_DATASOURCE_PASSWORD}
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true
    properties:
      hibernate:
        dialect: org.hibernate.dialect.MySQL8Dialect

Note: ddl-auto: update is convenient for development only. Use migrations (Flyway / Liquibase) for production.

4. Run (development)

mvn clean package
mvn spring-boot:run

Application will start on http://localhost:8080 by default.

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📌 API Documentation

If Swagger / OpenAPI is enabled:

http://localhost:8080/swagger-ui/index.html

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📘 Endpoints Overview (examples)

🔐 Auth

• POST /api/auth/register — Register a new user
• POST /api/auth/login — Authenticate and receive JWT

📚 Courses

• GET /api/courses — List courses
• POST /api/courses — Create a course (TEACHER/ADMIN)
• PUT /api/courses/{id} — Update a course
• DELETE /api/courses/{id} — Remove a course

📝 Assignments

• POST /api/assignments — Create assignment
• GET /api/assignments/course/{courseId} — Assignments for a course

📤 Submissions

• POST /api/submissions — Submit assignment (multipart)
• GET /api/submissions/student/{studentId} — Student submissions

👥 Groups

• POST /api/groups — Create group
• PUT /api/groups/{id} — Update group
• POST /api/groups/{id}/students — Add students to group

🌐 Communities

• POST /api/communities — Create community
• GET /api/communities/{id}/chat — Web chat endpoint (WebSocket)

Expand endpoints with pagination, sorting, and filters as needed.

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🧪 Testing

• Integration tests: Spring Boot Test, Testcontainers (optional for DB)
• Postman collection: /docs/postman_collection.json (optional)

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✅ Best Practices & Suggestions

• Use DTOs for all controller input/output.
• Centralize exception handling with @ControllerAdvice.
• Validate requests with @Valid and custom validators.
• Use role-based method security (@PreAuthorize) for fine-grained access.
• Externalize credentials (use Vault / secrets manager for prod).
• Add API rate limiting on sensitive endpoints.
• Use Flyway / Liquibase for schema migrations.
• Add logging + request tracing (Spring Sleuth / OpenTelemetry).

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🤝 Contributing

Contributions are welcome! Please:

1. Fork the repo
2. Create a feature branch
3. Open a PR describing your changes

Include tests and keep commits atomic.

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📄 License

This project is licensed under the MIT License — see LICENSE file.

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📞 Contact

Maintainer — Mahitosh Giri Name (mahitoshgiri287.email@example.com)

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