Trait CacheObserver 

pub trait CacheObserver: Send + Sync {
    // Required methods
    fn on_hit<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 str,
        access_count: u64,
    ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn on_miss<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn on_evict<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 str,
        reason: EvictionReason,
    ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
}

Observability hook for cache events.

Required Methods

fn on_hit<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, access_count: u64, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

fn on_miss<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

fn on_evict<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, reason: EvictionReason, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl CacheObserver for NoopObserver