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#![cfg(feature = "managed")]
use std::{convert::Infallible, time::Duration};
use tokio::time;
use deadpool::managed::{self, Metrics, Object, PoolError, RecycleResult, Timeouts};
type Pool = managed::Pool<Manager>;
struct Manager {}
impl managed::Manager for Manager {
type Type = usize;
type Error = Infallible;
async fn create(&self) -> Result<usize, Infallible> {
Ok(0)
}
async fn recycle(&self, _conn: &mut usize, _: &Metrics) -> RecycleResult<Infallible> {
Ok(())
}
}
#[tokio::test]
async fn basic() {
let mgr = Manager {};
let pool = Pool::builder(mgr).max_size(16).build().unwrap();
let status = pool.status();
assert_eq!(status.size, 0);
assert_eq!(status.available, 0);
assert_eq!(status.waiting, 0);
let obj0 = pool.get().await.unwrap();
let status = pool.status();
assert_eq!(status.size, 1);
assert_eq!(status.available, 0);
assert_eq!(status.waiting, 0);
let obj1 = pool.get().await.unwrap();
let status = pool.status();
assert_eq!(status.size, 2);
assert_eq!(status.available, 0);
assert_eq!(status.waiting, 0);
let obj2 = pool.get().await.unwrap();
let status = pool.status();
assert_eq!(status.size, 3);
assert_eq!(status.available, 0);
assert_eq!(status.waiting, 0);
drop(obj0);
let status = pool.status();
assert_eq!(status.size, 3);
assert_eq!(status.available, 1);
assert_eq!(status.waiting, 0);
drop(obj1);
let status = pool.status();
assert_eq!(status.size, 3);
assert_eq!(status.available, 2);
assert_eq!(status.waiting, 0);
drop(obj2);
let status = pool.status();
assert_eq!(status.size, 3);
assert_eq!(status.available, 3);
assert_eq!(status.waiting, 0);
}
#[tokio::test]
async fn closing() {
let mgr = Manager {};
let pool = Pool::builder(mgr).max_size(1).build().unwrap();
// fetch the only object from the pool
let obj = pool.get().await;
let join_handle = {
let pool = pool.clone();
tokio::spawn(async move { pool.get().await })
};
tokio::task::yield_now().await;
assert_eq!(pool.status().available, 0);
assert_eq!(pool.status().waiting, 1);
pool.close();
tokio::task::yield_now().await;
assert_eq!(pool.status().available, 0);
assert_eq!(pool.status().waiting, 0);
assert!(matches!(join_handle.await.unwrap(), Err(PoolError::Closed)));
assert!(matches!(pool.get().await, Err(PoolError::Closed)));
assert!(matches!(
pool.timeout_get(&Timeouts {
wait: Some(Duration::ZERO),
..pool.timeouts()
})
.await,
Err(PoolError::Closed)
));
drop(obj);
tokio::task::yield_now().await;
assert_eq!(pool.status().available, 0);
assert_eq!(pool.status().waiting, 0);
}
#[tokio::test(flavor = "multi_thread")]
async fn concurrent() {
let mgr = Manager {};
let pool = Pool::builder(mgr).max_size(3).build().unwrap();
// Spawn tasks
let futures = (0..100)
.map(|_| {
let pool = pool.clone();
tokio::spawn(async move {
let mut obj = pool.get().await.unwrap();
*obj += 1;
time::sleep(Duration::from_millis(1)).await;
})
})
.collect::<Vec<_>>();
// Await tasks to finish
for future in futures {
future.await.unwrap();
}
// Verify
let status = pool.status();
assert_eq!(status.size, 3);
assert_eq!(status.available, 3);
assert_eq!(status.waiting, 0);
let values = [
pool.get().await.unwrap(),
pool.get().await.unwrap(),
pool.get().await.unwrap(),
];
assert_eq!(values.iter().map(|obj| **obj).sum::<usize>(), 100);
}
#[tokio::test(flavor = "multi_thread")]
async fn object_take() {
let mgr = Manager {};
let pool = Pool::builder(mgr).max_size(2).build().unwrap();
let obj0 = pool.get().await.unwrap();
let obj1 = pool.get().await.unwrap();
let status = pool.status();
assert_eq!(status.size, 2);
assert_eq!(status.available, 0);
assert_eq!(status.waiting, 0);
let _ = Object::take(obj0);
let status = pool.status();
assert_eq!(status.size, 1);
assert_eq!(status.available, 0);
assert_eq!(status.waiting, 0);
let _ = Object::take(obj1);
let status = pool.status();
assert_eq!(status.size, 0);
assert_eq!(status.available, 0);
let obj0 = pool.get().await.unwrap();
let obj1 = pool.get().await.unwrap();
let status = pool.status();
assert_eq!(status.size, 2);
assert_eq!(status.available, 0);
assert_eq!(status.waiting, 0);
drop(obj0);
drop(obj1);
let status = pool.status();
assert_eq!(status.size, 2);
assert_eq!(status.available, 2);
assert_eq!(status.waiting, 0);
}
#[tokio::test]
async fn retain() {
let mgr = Manager {};
let pool = Pool::builder(mgr).max_size(4).build().unwrap();
{
let _a = pool.get().await;
let _b = pool.get().await;
tokio::time::sleep(Duration::from_millis(5)).await;
let _c = pool.get().await;
tokio::time::sleep(Duration::from_millis(5)).await;
}
assert_eq!(pool.status().size, 3);
let retain_result = pool.retain(|_, metrics| metrics.age() <= Duration::from_millis(10));
assert_eq!(retain_result.retained, 1);
assert_eq!(retain_result.removed.len(), 2);
assert_eq!(pool.status().size, 1);
tokio::time::sleep(Duration::from_millis(5)).await;
let retain_result = pool.retain(|_, metrics| metrics.age() <= Duration::from_millis(10));
assert_eq!(retain_result.retained, 0);
assert_eq!(retain_result.removed.len(), 1);
assert_eq!(pool.status().size, 0);
}
#[tokio::test]
async fn retain_fnmut() {
let mgr = Manager {};
let pool = Pool::builder(mgr).max_size(4).build().unwrap();
{
let _a = pool.get().await;
let _b = pool.get().await;
let _c = pool.get().await;
let _c = pool.get().await;
}
let mut removed = 0;
{
let retain_result = pool.retain(|_, _| {
removed += 1;
false
});
assert_eq!(retain_result.retained, 0);
assert_eq!(retain_result.removed.len(), 4);
}
assert_eq!(pool.status().size, 0);
}
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