mobc

Trait Manager

Source 
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 { ... }
}
Expand description

A trait which provides connection-specific functionality.

Required Associated Types§

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type Connection: Send + 'static

The connection type this manager deals with.

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type Error: Send + Sync + 'static

The error type returned by Connections.

Required Methods§

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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.

Source

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§

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fn spawn_task<T>(&self, task: T)
where T: Future + Send + 'static, T::Output: Send + 'static,

Spawns a new asynchronous task.

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

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

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§