Function retry_notify

pub fn retry_notify<F, B, N, T, E>(
    backoff: B,
    op: F,
    notify: N,
) -> Result<T, Error<E>>
where
    F: FnMut() -> Result<T, Error<E>>,
    B: Backoff,
    N: Notify<E>,

Retries this operation according to the backoff policy. Calls notify on failed attempts (in case of transient errors). backoff is reset before it is used.

Examples

let notify = |err, dur| { println!("Error happened at {:?}: {}", dur, err); };
let f = || -> Result<(), Error<&str>> {
    // Business logic...
    Err(Error::transient("error"))
};

let backoff = Stop{};
let _ = retry_notify(backoff, f, notify).err().unwrap();