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2024-10-22 09:13:50
Kameo 🎬

What is Kameo

Kameo is a lightweight Rust library for building fault-tolerant, distributed, and asynchronous actors. It allows seamless communication between actors across nodes, providing scalability , backpressure , and panic recovery for robust distributed systems.

Feature Highlights
- Async Rust: Each actor runs as a separate Tokio task, making concurrency easy and efficient.
- Supervision: Link actors to create a fault-tolerant, self-healing actor hierarchy.
- Remote Messaging: Send messages to actors on different nodes seamlessly.
- Panic Safety: Panics are gracefully handled, allowing the system to recover and continue running.
- Backpressure Management: Supports both bounded and unbounded mpsc messaging for handling load effectively.
Use Cases

Kameo is versatile and can be applied in various domains, such as:
- Distributed Microservices: Build resilient microservices that communicate reliably over a distributed network.
- Real-Time Systems: Ideal for building chat systems, multiplayer games, or real-time monitoring dashboards where low-latency communication is essential.
- IoT Devices: Deploy lightweight actors on low-resource IoT devices for seamless networked communication.
Getting Started

Prerequisites
- Rust installed (check rustup for installation instructions)
- A basic understanding of asynchronous programming in Rust
Installation

Add kameo as a dependency in your Cargo.toml file:

shell cargo add kameo

Example: Defining an Actor

```rust use kameo::Actor; use kameo::message::{Context, Message}; use kameo::request::MessageSend;

// Define an actor that will keep a count

[derive(Actor)]

struct Counter { count: i64, }

// Define the message for incrementing the count struct Inc { amount: i64 }

// Implement how the actor will handle incoming messages impl Message for Counter { type Reply = i64;
```
async fn handle(&mut self, msg: Inc, _ctx: Context<'_, Self, Self::Reply>) -> Self::Reply {
    self.count += msg.amount;
    self.count
}
```
} ```

Spawn and message the actor.

```rust // Spawn the actor and get a reference to it let actor_ref = kameo::spawn(Counter { count: 0 });

// Use the actor reference to send a message and receive a reply let count = actor_ref.ask(Inc { amount: 42 }).send().await?; assert_eq!(count, 42); ```

Additional Resources
Contributing

Contributions are welcome! Whether you are a beginner or an experienced Rust developer, there are many ways to contribute:
- Report issues or bugs
- Improve documentation
- Submit pull requests for new features or bug fixes
- Suggest new ideas in discussions
Join our community on Discord to connect with fellow contributors!
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