# backon   [![Build Status]][actions] [![Latest Version]][crates.io] [](https://discord.gg/8ARnvtJePD)
[Build Status]: https://img.shields.io/github/actions/workflow/status/Xuanwo/backon/ci.yml?branch=main
[actions]: https://github.com/Xuanwo/backon/actions?query=branch%3Amain
[Latest Version]: https://img.shields.io/crates/v/backon.svg
[crates.io]: https://crates.io/crates/backon
Retry with backoff without effort.
---
The opposite backoff implementation of the popular [backoff](https://docs.rs/backoff).
- Newer: developed by Rust edition 2021 and latest stable.
- Cleaner: Iterator based abstraction, easy to use, customization friendly.
- Easier: Trait based implementations, works like a native function provided by closures.
## Quick Start
Retry a blocking function.
```rust
use anyhow::Result;
use backon::BlockingRetryable;
use backon::ExponentialBuilder;
fn fetch() -> Result<String> {
Ok("hello, world!".to_string())
}
fn main() -> Result<()> {
let content = fetch.retry(&ExponentialBuilder::default()).call()?;
println!("fetch succeeded: {}", content);
Ok(())
}
```
Retry an async function.
```rust
use anyhow::Result;
use backon::ExponentialBuilder;
use backon::Retryable;
async fn fetch() -> Result<String> {
Ok(reqwest::get("https://www.rust-lang.org").await?.text().await?)
}
#[tokio::main]
async fn main() -> Result<()> {
let content = fetch.retry(&ExponentialBuilder::default()).await?;
println!("fetch succeeded: {}", content);
Ok(())
}
```
## Contributing
Check out the [CONTRIBUTING.md](./CONTRIBUTING.md) guide for more details on getting started with contributing to this
project.
## Getting help
Submit [issues](https://github.com/Xuanwo/backon/issues/new/choose) for bug report or asking questions
in [discussion](https://github.com/Xuanwo/backon/discussions/new?category=q-a).
#### License
<sup>
Licensed under <a href="./LICENSE">Apache License, Version 2.0</a>.
</sup>