| use std::fmt::Debug; |
| use std::time::Duration; |
| |
| /// BackoffBuilder is used to build a new backoff. |
| pub trait BackoffBuilder: Clone + Debug + Send + Sync + Unpin { |
| /// The associated backoff that returned by this builder. |
| type Backoff: Backoff; |
| |
| /// Builder a new backoff via builder. |
| fn build(&self) -> Self::Backoff; |
| } |
| |
| /// Backoff is an [`Iterator`] that returns [`Duration`]. |
| /// |
| /// - `Some(Duration)` means caller need to `sleep(Duration)` and retry the same request |
| /// - `None` means we have reaching the limits, caller needs to return current error instead. |
| pub trait Backoff: Iterator<Item = Duration> + Send + Sync + Unpin {} |
| impl<T> Backoff for T where T: Iterator<Item = Duration> + Debug + Send + Sync + Unpin {} |
