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spring-blog-api

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🤓 A RESTful blog API built with Java Spring Boot including features like JWTs, Spring Security, and more. 🌱 Perfect for learning, and we especially appreciate contributions from beginners!

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# 🚀 Spring Blog API

Welcome to **Spring Blog API**! This is a modern, secure, and scalable RESTful backend service for managing blog posts and user authentication, built with Spring Boot. The project is currently under active development and new features are coming soon.

> **🌱 Newcomers Welcome!**
> We encourage developers of all experience levels to contribute. Whether you're new to open source or a seasoned pro, your ideas and code are valued here. Check out our [CONTRIBUTING.md](CONTRIBUTING.md) for easy ways to get started!

## 🛠️ Technologies Used

- Java 24
- Spring Boot 3.5
- Spring Security
- Spring Data JPA
- Hibernate ORM
- PostgreSQL
- JWT (JSON Web Token)
- Lombok
- Spring Mail
- Gradle
- Docker & Docker Compose
- JUnit 5
- PgAdmin
- Resilience4j (Rate Limiting & Circuit Breaker)

## ⚡ Getting Started

### Prerequisites

- Java 24
- Docker (optional, for containerization)
- Gradle

### 🚦 Setup

1. Clone the repository:
 ```bash
 git clone <repository-url>
 cd spring-blog-api
 ```
2. Build the project:
 ```bash
 ./gradlew build
 ```
3. Run Docker:
 ```bash
 docker-compose up
 ```
4. Use the API service on:
 ```
 http://localhost:8082/api/v1/
 ```

### ⚙️ Configuration

Edit `src/main/resources/application.yml` to configure database and other settings.

## 📖 API Documentation

Interactive API documentation is available via Swagger UI. 
**Most requests require an `Authorization: Bearer <JWT>` header.**

**`http://localhost:8082/api/v1/swagger-ui/index.html#/`**

#### Notes

- Duplicate prevention is enforced by a unique database constraint `(user_id, blog_id)` and idempotent service logic.
- The current user is resolved from the JWT claim `uid`.
- Error codes:
  - `401 Unauthorized` — missing/expired token
  - `404 Not Found` — blog does not exist

## 🛡️ Rate Limiting & Circuit Breaker

This API implements robust rate limiting and circuit breaker patterns to protect against abuse and service failures:

### Rate Limiting

- **Default API endpoints**: 20 requests/60 seconds
- **Authentication endpoints**: 5 requests/60 seconds

### Circuit Breaker

- Automatic database failure detection
- Service degradation during outages
- Graceful error responses (503 Service Unavailable)

## Star History

## ✨ Contributors

Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/emoji-key/)):

<table>
 <tbody>
 <tr>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/huseynovvusal"><img src="https://avatars.githubusercontent.com/u/87518350?s=100" width="100px;" alt="huseynovvusal"/> huseynovvusal</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=huseynovvusal" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/jaindeepak1401"><img src="https://avatars.githubusercontent.com/u/93066547?s=100" width="100px;" alt="jaindeepak1401"/> jaindeepak1401</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=jaindeepak1401" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/Surya00011"><img src="https://avatars.githubusercontent.com/u/131737876?s=100" width="100px;" alt="Surya00011"/> Surya00011</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=Surya00011" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/LuisMunizEnc"><img src="https://avatars.githubusercontent.com/u/210091604?s=100" width="100px;" alt="LuisMunizEnc"/> LuisMunizEnc</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=LuisMunizEnc" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/c-arianna"><img src="https://avatars.githubusercontent.com/u/152692185?s=100" width="100px;" alt="c-arianna"/> c-arianna</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=c-arianna" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/axgiri"><img src="https://avatars.githubusercontent.com/u/146159445?s=100" width="100px;" alt="axgiri"/> axgiri</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=axgiri" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/chandraKiranBolla"><img src="https://avatars.githubusercontent.com/u/186732099?s=100" width="100px;" alt="chandraKiranBolla"/> chandraKiranBolla</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=chandraKiranBolla" title="Code">💻</a></td>
 </tr>
 <tr>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/SRokesh-28"><img src="https://avatars.githubusercontent.com/u/176596613?s=100" width="100px;" alt="SRokesh-28"/> SRokesh-28</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=SRokesh-28" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/Pranjall-Gupta"><img src="https://avatars.githubusercontent.com/u/174760024?s=100" width="100px;" alt="Pranjall-Gupta"/> Pranjall-Gupta</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=Pranjall-Gupta" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/SantiagoLuna109"><img src="https://avatars.githubusercontent.com/u/203914119?s=100" width="100px;" alt="SantiagoLuna109"/> SantiagoLuna109</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=SantiagoLuna109" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/xinjia-ctrl"><img src="https://avatars.githubusercontent.com/u/188528424?s=100" width="100px;" alt="xinjia-ctrl"/> xinjia-ctrl</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=xinjia-ctrl" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/shivaprasadphshiva"><img src="https://avatars.githubusercontent.com/u/219318111?s=100" width="100px;" alt="shivaprasadphshiva"/> shivaprasadphshiva</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=shivaprasadphshiva" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/naookko"><img src="https://avatars.githubusercontent.com/u/114715116?s=100" width="100px;" alt="naookko"/> naookko</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=naookko" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/liuyuanyuan090"><img src="https://avatars.githubusercontent.com/u/106043703?s=100" width="100px;" alt="liuyuanyuan090"/> liuyuanyuan090</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=liuyuanyuan090" title="Code">💻</a></td>
 </tr>
 <tr>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/joonseolee"><img src="https://avatars.githubusercontent.com/u/43516757?s=100" width="100px;" alt="joonseolee"/> joonseolee</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=joonseolee" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/jkim1202"><img src="https://avatars.githubusercontent.com/u/112814261?s=100" width="100px;" alt="jkim1202"/> jkim1202</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=jkim1202" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/fercamoub"><img src="https://avatars.githubusercontent.com/u/209853419?s=100" width="100px;" alt="fercamoub"/> fercamoub</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=fercamoub" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/Loumo-on"><img src="https://avatars.githubusercontent.com/u/149517773?s=100" width="100px;" alt="Loumo-on"/> Loumo-on</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=Loumo-on" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/gp07-cmd"><img src="https://avatars.githubusercontent.com/u/263711587?v=4?s=100" width="100px;" alt="gp07-cmd"/> gp07-cmd</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=gp07-cmd" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/NimishNatani"><img src="https://avatars.githubusercontent.com/u/135497893?v=4?s=100" width="100px;" alt="NimishNatani"/> NimishNatani</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=NimishNatani" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/04ritesh"><img src="https://avatars.githubusercontent.com/u/108223455?v=4?s=100" width="100px;" alt="Ritesh Kumar"/> Ritesh Kumar</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=04ritesh" title="Code">💻</a></td>
 </tr>
 <tr>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/Adityaaprakash"><img src="https://avatars.githubusercontent.com/u/197950266?v=4?s=100" width="100px;" alt="Aditya Prakash"/> Aditya Prakash</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=Adityaaprakash" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/subbareddypalagiri"><img src="https://avatars.githubusercontent.com/u/167409324?v=4?s=100" width="100px;" alt="Subba Reddy Palagiri"/> Subba Reddy Palagiri</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=subbareddypalagiri" title="Code">💻</a></td>
 <td align="center" valign="top" width="14.28%"><a href="https://github.com/wipheg"><img src="https://avatars.githubusercontent.com/u/63744049?v=4?s=100" width="100px;" alt="Sangwon Park"/> Sangwon Park</a> <a href="https://github.com/huseynovvusal/spring-blog-api/commits?author=wipheg" title="Code">💻</a></td>
 </tr>
 </tbody>
</table>

This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!

## 🤝 Contributing

See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.

## 📄 License

This project is licensed under the MIT License.

## 🚧 Status

**This project is in active development and not yet complete. Features and documentation may change.**

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