Trait mobc::Manager

pub trait Manager: Send + Sync + 'static {
    type Connection: Send + 'static;
    type Error: Send + Sync + 'static;

    // Required methods
    fn connect<'life0, 'async_trait>(
        &'life0 self
    ) -> Pin<Box<dyn Future<Output = Result<Self::Connection, Self::Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn check<'life0, 'async_trait>(
        &'life0 self,
        conn: Self::Connection
    ) -> Pin<Box<dyn Future<Output = Result<Self::Connection, Self::Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;

    // Provided methods
    fn spawn_task<T>(&self, task: T)
       where T: Future + Send + 'static,
             T::Output: Send + 'static { ... }
    fn validate(&self, _conn: &mut Self::Connection) -> bool { ... }
}

A trait which provides connection-specific functionality.

Required Associated Types

type Connection: Send + 'static

The connection type this manager deals with.

type Error: Send + Sync + 'static

The error type returned by Connections.

Required Methods

fn connect<'life0, 'async_trait>( &'life0 self ) -> Pin<Box<dyn Future<Output = Result<Self::Connection, Self::Error>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Attempts to create a new connection.

fn check<'life0, 'async_trait>( &'life0 self, conn: Self::Connection ) -> Pin<Box<dyn Future<Output = Result<Self::Connection, Self::Error>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Determines if the connection is still connected to the database when check-out.

A standard implementation would check if a simple query like SELECT 1 succeeds.

Provided Methods

fn spawn_task<T>(&self, task: T)

where T: Future + Send + 'static, T::Output: Send + 'static,

Spawns a new asynchronous task.

fn validate(&self, _conn: &mut Self::Connection) -> bool

Quickly determines a connection is still valid when check-in.

Object Safety

This trait is not object safe.

Implementors