Trait Middleware

Source

pub trait Middleware: Send + Sync {
    // Provided methods
    fn before<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        _link: Option<&'life1 dyn LegacyLink>,
        _ctx: &'life2 Context,
    ) -> Pin<Box<dyn Future<Output = Result<(), Box<dyn Error + Send + Sync>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait { ... }
    fn after<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        _link: Option<&'life1 dyn LegacyLink>,
        _ctx: &'life2 Context,
    ) -> Pin<Box<dyn Future<Output = Result<(), Box<dyn Error + Send + Sync>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait { ... }
    fn on_error<'life0, 'life1, 'life2, 'life3, 'async_trait>(
        &'life0 self,
        _link: Option<&'life1 dyn LegacyLink>,
        _error: &'life2 Box<dyn Error + Send + Sync>,
        _ctx: &'life3 Context,
    ) -> Pin<Box<dyn Future<Output = Result<(), Box<dyn Error + Send + Sync>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait,
             'life3: 'async_trait { ... }
}

Expand description

Gentle enhancer—optional hooks with forgiving defaults. Trait that middleware implementations can implement. Implementors can override any combination of before(), after(), and on_error().