Storage

A comprehensive Java storage library for fast and convenient storing and accessing data in your Java applications. Currently supports MinIO and Firebase storage services with a unified API.

Table of Contents

• Features
• Quick Start
• Installation
  • Maven
  • Gradle
• Core Components
  • Storage Service Interface
  • Storage File
  • Page Pagination
• Supported Providers
  • MinIO Storage Service
  • Firebase Storage Service
• Usage Examples
  • Instantiate a Service
  • Save File
  • Delete File
  • Check If File Exists
  • Get File
• License
• Contributing

Features

• Unified Storage API - Consistent interface for multiple storage providers
• Multi-Provider Support - Currently supports MinIO and Firebase with extensible architecture
• File Management - Complete file operations: save, delete, find, list
• Pagination Support - Built-in pagination for listing files in directories
• Flexible Path Handling - Support for file operations with and without path prefixes
• Stream-Based Operations - Efficient memory usage with InputStream-based file handling
• Type Safety - Strongly typed file metadata and operations

Quick Start

Get your file storage operations up and running quickly with a unified API that works across multiple storage providers.

Installation

Maven

Add to your pom.xml:

<dependency>
    <groupId>io.github.ilyalisov</groupId>
    <artifactId>storage</artifactId>
    <version>0.1.0</version>
</dependency>

Gradle

Add to your build.gradle or build.gradle.kts:

implementation("io.github.ilyalisov:storage:0.1.0")

Core Components

Storage Service Interface

The foundation for all storage operations with a unified API:

public interface StorageService {
    Path save(StorageFile file);
    Path save(StorageFile file, Path path);
    void delete(String fileName);
    void delete(String fileName, Path path);
    void delete(Path path);
    boolean exists(String fileName);
    boolean exists(String fileName, Path path);
    Optional<StorageFile> find(String fileName);
    Optional<StorageFile> find(String fileName, Path path);
    List<StorageFile> findAll(Path path, Page page);
}

Storage File

Represents a file with metadata and content:

public class StorageFile {
    private String fileName;
    private String contentType;
    private InputStream inputStream;
    private long size;
    // ... getters, setters, and validation
}

Page Pagination

Simple pagination support for listing files:

public class Page {
    private int pageNumber;
    private int pageSize;
    // ... getters, setters, and validation
}

Supported Providers

MinIO Storage Service

MinIO implementation for high-performance object storage:

StorageService storageService = new MinIOStorageServiceImpl(
    "http://localhost:9000",  // host
    "rootUser",               // username
    "rootPassword",           // password
    "bucket"                  // bucket name
);

Firebase Storage Service

Firebase Cloud Storage implementation:

InputStream credentials = new ByteArrayInputStream(
    System.getenv("FIREBASE_SECRET").getBytes()
);
StorageService storageService = new FirebaseStorageServiceImpl(
    credentials,              // Firebase service account credentials
    "firebase-bucket"        // Firebase storage bucket
);

Usage Examples

Instantiate a Service

You need to create MinIOStorageService object and pass login data for MinIO to the constructor.

public class Main {
    public static void main(String[] args) {
        String host = "http://localhost:9000";
        String rootUser = "rootUser";
        String rootPassword = "rootPassword";
        String bucket = "bucket";

        StorageService storageService = new MinIOStorageServiceImpl(
                host,
                rootUser,
                rootPassword,
                bucket
        );
    }
}

And for Firebase it is a bit different.

public class Main {
    public static void main(String[] args) {
        InputStream inputStream = new ByteArrayInputStream(
                System.getenv("FIREBASE_SECRET").getBytes()
        );
        String bucket = System.getenv("FIREBASE_BUCKET");

        StorageService storageService = new FirebaseStorageServiceImpl(
                inputStream,
                bucket
        );
    }
}

After, you can call available methods and use library.

Save File

To save file just call method save. It will return path to saved file.

public class Main {
    public static void main(String[] args) {
        StorageFile file = new StorageFile(
                "fileName",
                "text/plain",
                new ByteArrayInputStream("...")
        );

        Path path = storageService.save(file);
    }
}

Delete File

You can delete file by its name, name and path, and you can delete entire folder by path.

public class Main {
    public static void main(String[] args) {
        storageService.delete("file.txt");
        storageService.delete("file.txt", Path.of("folder"));
        storageService.delete(Path.of("folder"));
    }
}

Check If File Exists

You can check whether file exists or not.

public class Main {
    public static void main(String[] args) {
        boolean file1 = storageService.exists("file.txt");
        boolean file2 = storageService.exists("file.txt", Path.of("folder"));
    }
}

Get File

You can get file from storage by calling corresponding methods.

public class Main {
    public static void main(String[] args) {
        Optional<StorageFile> file = storageService.find("file.txt");
        Optional<StorageFile> file2 = storageService.find("file.txt", Path.of("folder"));
        List<StorageFile> files = storageService.findAll(
                Path.of("folder"),
                new Page(0, 10)
        );
    }
}

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contributing

We welcome contributions! Please feel free to submit issues and enhancement requests.

To contribute, make a fork and open a pull request. You can find issues here.

Make sure you follow the project's codestyle.