Journal App

A backend Journal Management application built with Spring Boot and MongoDB. The application allows users to securely create, manage, and organize personal journal entries.

Features

• User Registration and Management
• Spring Security Authentication (Basic Auth)
• Password Encryption using BCrypt
• Role-Based Authorization (USER / ADMIN)
• Journal Entry CRUD Operations
• User-Specific Journal Access Control
• MongoDB Atlas Integration
• Spring Data MongoDB Repositories
• DBRef Relationship Mapping between Users and Journal Entries
• Transaction Management with MongoTransactionManager
• RESTful APIs
• Layered Architecture (Controller → Service → Repository)
• Exception Handling and Logging
• Lombok Integration
• JUnit 5 Testing
• Parameterized Tests
• Custom Test Data Providers using ArgumentsProvider

Tech Stack

• Java 21
• Spring Boot
• Spring Security
• Spring Data MongoDB
• MongoDB Atlas
• Maven
• Lombok
• JUnit 5

Project Structure

src/main/java
├── controller
├── service
├── repository
├── entity
├── config
└── JournalAppApplication

src/test/java
├── service
│   ├── UserServiceTests
│   └── UserArgumentProvider

Learning Concepts Covered

• Dependency Injection (IoC)
• Spring Bean Lifecycle
• REST API Development
• MongoDB CRUD Operations
• MongoDB Relationships using DBRef
• Transactions in MongoDB
• Authentication and Authorization
• Password Hashing with BCrypt
• Custom UserDetailsService
• Repository Pattern
• Exception Handling
• Spring Security Filter Chain
• Basic Authentication
• Role-Based Access Control (RBAC)
• Unit Testing with JUnit 5
• Parameterized Testing
• Custom Argument Sources
• Test Automation using Maven

Current Status

• ✅ User Authentication
• ✅ Role-Based Authorization
• ✅ Journal CRUD APIs
• ✅ MongoDB Atlas Integration
• ✅ Transaction Management
• ✅ JUnit Testing
• ✅ Parameterized Testing
• 🔄 Mockito-Based Unit Testing (In Progress)
• 🔄 JWT Authentication (Planned)

Future Enhancements

• JWT Authentication
• Refresh Tokens
• Global Exception Handling
• Swagger / OpenAPI Documentation
• Dockerization
• CI/CD Pipeline using GitHub Actions
• Integration Tests and Mockito
• API Rate Limiting
• Audit Logging

Getting Started

Clone the Repository

git clone https://github.com/ashim-roy/JornalApp.git
cd JornalApp

Configure MongoDB

Update application.properties with your MongoDB Atlas connection string.

Run the Application

./mvnw spring-boot:run

Run Tests

./mvnw test