Trait diesel::r2d2::CustomizeConnection
source · [−]pub trait CustomizeConnection<C, E>: 'static + Debug + Send + Sync {
fn on_acquire(&self, conn: &mut C) -> Result<(), E> { ... }
fn on_release(&self, conn: C) { ... }
}
Expand description
A trait which allows for customization of connections.
Provided methods
fn on_acquire(&self, conn: &mut C) -> Result<(), E>
fn on_acquire(&self, conn: &mut C) -> Result<(), E>
Called with connections immediately after they are returned from
ManageConnection::connect
.
The default implementation simply returns Ok(())
.
Errors
If this method returns an error, the connection will be discarded.
fn on_release(&self, conn: C)
fn on_release(&self, conn: C)
Called with connections when they are removed from the pool.
The connections may be broken (as reported by is_valid
or
has_broken
), or have simply timed out.
The default implementation does nothing.