eztry 0.0.1

easy-to-use utilities to add retry logic to async functions
Documentation 
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use crate::policy::RetryPolicy;
use crate::prelude::AsyncFunction;
use crate::retry_result::RetryResult;
use crate::{util};

pub struct Retryer<'a, T, E> {
    pub(crate) policy: util::OwnedOrRef<'a, RetryPolicy>,
    pub(crate) count: u64, /* not pub, meant to be internal only */
    pub(crate) function: AsyncFunction<'a, T, E>,
}

impl<T, E> Retryer<'_, T, E> {
    pub async fn run(&mut self) -> Result<T, E> {
        let f = &self.function;
        let policy = self.policy.as_ref();
        self.count = 0;
        loop {
            self.count += 1;
            match f.execute().await {
                RetryResult::Success(v) => return Ok(v),
                RetryResult::Abort(v) => return Err(v),
                RetryResult::Retry(e) => {
                    if self.count >= policy.limit {
                        return Err(e);
                    }
                    policy.wait(self.count).await
                }
            }
        }
    }

    pub fn set_policy(&mut self, policy: RetryPolicy) {
        self.policy = util::OwnedOrRef::Owned(policy);
    }
    pub fn count(&self) -> u64 {
        self.count
    }
}

pub struct ClosureRetryer<'a, T, E, F>
where
    F: AsyncFn() -> RetryResult<T, E> + Send + Sync,
{
    pub(crate) policy: util::OwnedOrRef<'a, RetryPolicy>,
    pub(crate) count: u64, /* not pub, meant to be internal only */
    pub(crate) function: F,
}

impl<T, E, F> ClosureRetryer<'_, T, E, F>
where
    F: AsyncFn() -> RetryResult<T, E> + Send + Sync,
{
    pub async fn run(mut self) -> Result<T, E> {
        let f = &self.function;
        let policy = self.policy.as_ref();
        self.count = 0;
        loop {
            self.count += 1;
            match f().await {
                RetryResult::Success(v) => return Ok(v),
                RetryResult::Abort(v) => return Err(v),
                RetryResult::Retry(e) => {
                    if self.count >= policy.limit {
                        return Err(e);
                    }
                    policy.wait(self.count).await
                }
            }
        }
    }

    pub fn set_policy(&mut self, policy: RetryPolicy) {
        self.policy = util::OwnedOrRef::Owned(policy);
    }
    pub fn count(&self) -> u64 {
        self.count
    }
}