Quick Pool

High Performance Async Generic Pool

Usage

DBCP

| Database | Backend | Adapter | Version | | ------------ | ---------------- | ------------- | ---------------------- | | [PostgreSQL] | [tokio-postgres] | [qp-postgres] | ![qp-postgres-version] |

Example

```rust use asynctrait::asynctrait; use qp::resource::Manage; use qp::{Pool, Pooled};

pub struct IntManager;

[async_trait]

impl Manage for IntManager { type Output = i32; type Error = ();

async fn try_create(&self) -> Result<Self::Output, Self::Error> {
    Ok(0)
}

async fn validate(&self, resource: &Self::Output) -> bool {
    resource >= &0
}

}

[tokio::main]

async fn main() { let pool = Pool::new(IntManager, 1); // max_size=1

// create a resource when the pool is empty or all resources are occupied.
let mut int = pool.acquire().await.unwrap();
*int = 1;
dbg!(*int); // 1
dbg!(Pooled::is_valid(&int).await); // true; validate the resource.

// release the resource and put it back to the pool.
drop(int);

let mut int = pool.acquire().await.unwrap();
dbg!(*int); // 1
*int = 100;
drop(int);

let mut int = pool.acquire().await.unwrap();
dbg!(*int); // 100
*int = -1; // the resource will be disposed because `validate` is false.
dbg!(Pooled::is_valid(&int).await); // false
drop(int);

let int = pool.acquire_unchecked().await.unwrap();
dbg!(*int); // -1; no validation before acquiring.
drop(int);

let int = pool.acquire().await.unwrap();
dbg!(*int); // 0; old resource is disposed and create new one.

// take the resource from the pool.
let raw_int: i32 = Pooled::take(int); // raw resource
dbg!(raw_int); // 0
drop(raw_int);

let _int = pool.acquire().await.unwrap();
// `_int` will be auto released by `Pooled` destructor.

} ```

Alternatives

| Crate | Version | | ---------- | ------------------- | | [bb8] | ![bb8-version] | | [deadpool] | ![deadpool-version] | | [mobc] | ![mobc-version] | | [r2d2] | ![r2d2-version] |

Performance Comparison

Resource Acquisition Time Benchmark

For more information, see Rust Pool Benchmark.

License

```text Copyright (c) 2022 Seungjae Park

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ```

Quick Pool is licensed under the MIT License.