import type { HitStatisticsRecord } from 'toad-cache';
import type { CommonCacheConfiguration } from '../types/DataSources';
import type { GetManyResult, SynchronousCache } from '../types/SyncDataSources';
type CacheTypeId = 'lru-map' | 'fifo-map' | 'lru-object' | 'fifo-object' | 'lru-object-statistics';
export interface InMemoryCacheConfiguration extends CommonCacheConfiguration {
    cacheId?: string;
    globalStatisticsRecord?: HitStatisticsRecord;
    cacheType?: CacheTypeId;
    maxItems?: number;
}
export declare class InMemoryCache<T> implements SynchronousCache<T> {
    private readonly cache;
    name: string;
    readonly ttlLeftBeforeRefreshInMsecs?: number;
    constructor(config: InMemoryCacheConfiguration);
    clear(): void;
    delete(key: string): void;
    deleteMany(keys: string[]): void;
    get(key: string): T | null | undefined;
    getMany(keys: string[]): GetManyResult<T>;
    getExpirationTime(key: string): number | undefined;
    set(key: string, value: T | null): void;
}
export {};