ru-di

A simple and lightweight dependency injection container for Rust.

Features

• Simple and lightweight
• Thread-safe
• Support for both transient and singleton services
• No runtime overhead
• Zero dependencies

Installation

Add this to your Cargo.toml:

[dependencies]
ru-di = "0.1"

Usage

Basic Usage

use ru_di::Di;

// Define your services
struct Database {
    port: u16,
}

struct AppService {
    db: Database,
}

// Register services
Di::register::<Database, _>(|_| Database { port: 3306 });
Di::register::<AppService, _>(|di| {
    let db = di._get::<Database>().unwrap();
    AppService { db: db.clone() }
});

// Get service instance
let app = Di::get::<AppService>().unwrap();
assert_eq!(app.db.port, 3306);

Singleton Services

use ru_di::Di;

#[derive(Debug, PartialEq)]
struct Configuration {
    port: u16,
}

// Register a singleton
Di::register_single(Configuration { port: 8080 });

// Get singleton instance
if let Some(mut config) = Di::get_single::<Configuration>() {
    let config = config.get_mut();
    assert_eq!(config.port, 8080);
    config.port = 8081;
}

// The change persists
if let Some(mut config) = Di::get_single::<Configuration>() {
    let config = config.get_mut();
    assert_eq!(config.port, 8081);
}

API Documentation

Registering Services

• Di::register<T, F>(factory: F) - Register a transient service
• Di::register_single<T>(instance: T) - Register a singleton service

Getting Services

• Di::get<T>() -> Result<T, Box<dyn Error>> - Get a transient service instance
• Di::get_single<T>() -> Option<SingleRef<T>> - Get a singleton service instance

Thread Safety

All operations are thread-safe. The container uses Arc, Mutex, and RwLock internally to ensure thread safety.

License

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