use std::marker::PhantomData;
use crate::{Endpoint, Request, Result};
pub struct InspectError<E, F, ErrType> {
inner: E,
f: F,
_mark: PhantomData<ErrType>,
}
impl<E, F, ErrType> InspectError<E, F, ErrType> {
#[inline]
pub(crate) fn new(inner: E, f: F) -> InspectError<E, F, ErrType> {
Self {
inner,
f,
_mark: PhantomData,
}
}
}
impl<E, F, ErrType> Endpoint for InspectError<E, F, ErrType>
where
E: Endpoint,
F: Fn(&ErrType) + Send + Sync,
ErrType: std::error::Error + Send + Sync + 'static,
{
type Output = E::Output;
async fn call(&self, req: Request) -> Result<Self::Output> {
match self.inner.call(req).await {
Ok(resp) => Ok(resp),
Err(err) if err.is::<ErrType>() => {
(self.f)(err.downcast_ref::<ErrType>().unwrap());
Err(err)
}
Err(err) => Err(err),
}
}
}