transitory/src/cache/RemovalListener.ts

In-memory cache with high hit rates via LFU eviction. Supports time-based expiration, automatic loading and metrics.

import { KeyType } from './KeyType';
import { RemovalReason } from './RemovalReason';

/**
 * Listener for removal events. Receives the key, value and the reason it
 * was removed from the cache.
 */
export type RemovalListener<K extends KeyType, V> = (key: K, value: V, reason: RemovalReason) => void;