Returns a Builder instance to configure a new pool.

Returns information about the current state of the pool.

Run a closure with a Connection.

The closure will be executed on the tokio event loop provided during the construction of this pool, so it must be Send. The closure's return value is also Send so that the Future can be consumed in contexts where Send is needed.

Futures 0.3 + Async/Await

In order to use this with Futures 0.3 + async/await syntax, use .boxed().compat() on the inner future in order to convert it to a version 0.1 Future.

// Note that this version of `futures` is 0.3
use futures::compat::{Future01CompatExt}; // trait provides `.compat()`

async fn future_03_example(client: Client) -> Result<(String, Client), (Error, Client)> {
    Ok(("Example".to_string(), client))
}

client.run(|client| {
    future_03_example(client).boxed().compat()
})

Get a new dedicated connection that will not be managed by the pool. An application may want a persistent connection (e.g. to do a postgres LISTEN) that will not be closed or repurposed by the pool.

This method allows reusing the manager's configuration but otherwise bypassing the pool