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pub use self::imp::{pool_endpoint, PoolEndpoint};
mod imp {
use finchers::endpoint::{ApplyContext, ApplyResult, Endpoint};
use finchers::error;
use finchers::error::Error;
use futures::{Async, Future, Poll};
use r2d2::{ManageConnection, Pool, PooledConnection};
use std::fmt;
pub fn pool_endpoint<M>(pool: Pool<M>) -> PoolEndpoint<M>
where
M: ManageConnection,
{
PoolEndpoint { pool }
}
#[derive(Debug, Clone)]
pub struct PoolEndpoint<M: ManageConnection> {
pool: Pool<M>,
}
impl<'a, M> Endpoint<'a> for PoolEndpoint<M>
where
M: ManageConnection + 'a,
{
type Output = (PooledConnection<M>,);
type Future = PoolFuture<'a, M>;
fn apply(&'a self, _: &mut ApplyContext<'_>) -> ApplyResult<Self::Future> {
Ok(PoolFuture { endpoint: self })
}
}
pub struct PoolFuture<'a, M: ManageConnection> {
endpoint: &'a PoolEndpoint<M>,
}
impl<'a, M> fmt::Debug for PoolFuture<'a, M>
where
M: ManageConnection + fmt::Debug,
M::Connection: fmt::Debug,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("PoolFuture")
.field("endpoint", &self.endpoint)
.finish()
}
}
impl<'a, M> Future for PoolFuture<'a, M>
where
M: ManageConnection,
{
type Item = (PooledConnection<M>,);
type Error = Error;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
self.endpoint
.pool
.get()
.map(|conn| Async::Ready((conn,)))
.map_err(error::fail)
}
}
}