rust-async-patterns

# Rust Async Patterns Production patterns for async Rust programming with Tokio runtime, including tasks, channels, streams, and error handling. ## When to Use This Skill - Building async Rust applications - Implementing concurrent network services - Using Tokio for async I/O - Handling async errors properly - Debugging async code issues - Optimizing async performance ## Core Concepts ### 1. Async Execution Model ``` Future (lazy) → poll() → Ready(value) | Pending ↑ ↓ Waker ← Runtime schedules ``` ### 2. Key Abstractions | Concept | Purpose | | ---------- | ---------------------------------------- | | `Future` | Lazy computation that may complete later | | `async fn` | Function returning impl Future | | `await` | Suspend until future completes | | `Task` | Spawned future running concurrently | | `Runtime` | Executor that polls futures | ## Quick Start ```toml # Cargo.toml [dependencies] tokio = { version = "1", features = ["full"] } futures = "0.3" async-trait = "0.1" anyhow = "1.0" tracing = "0.1" tracing-subscriber = "0.3" ``` ```rust use tokio::time::{sleep, Duration}; use anyhow::Result; #[tokio::main] async fn main() -> Result<()> { // Initialize tracing tracing_subscriber::fmt::init(); // Async operations let result = fetch_data("https://api.example.com").await?; println!("Got: {}", result); Ok(()) } async fn ...