import type { HitStatisticsRecord } from 'toad-cache';
import type { CommonCacheConfiguration } from '../types/DataSources';
import type { GetManyResult, SynchronousGroupCache } from '../types/SyncDataSources';
type CacheTypeId = 'lru-map' | 'fifo-map' | 'lru-object' | 'fifo-object' | 'lru-object-statistics';
export interface InMemoryGroupCacheConfiguration extends CommonCacheConfiguration {
    cacheId?: string;
    globalStatisticsRecord?: HitStatisticsRecord;
    cacheType?: CacheTypeId;
    groupCacheType?: CacheTypeId;
    groupTtlInMsecs?: number;
    maxGroups?: number;
    maxItemsPerGroup?: number;
}
export declare class InMemoryGroupCache<T> implements SynchronousGroupCache<T> {
    private readonly groups;
    private readonly maxItemsPerGroup;
    name: string;
    private readonly ttlInMsecs;
    readonly ttlLeftBeforeRefreshInMsecs?: number;
    private readonly cacheConstructor;
    private readonly groupCacheConstructor;
    private readonly cacheId?;
    private readonly globalStatisticsRecord?;
    constructor(config: InMemoryGroupCacheConfiguration);
    private resolveGroup;
    deleteGroup(group: string): void;
    getFromGroup(key: string, groupId: string): T | null | undefined;
    getManyFromGroup(keys: string[], group: string): GetManyResult<T>;
    setForGroup(key: string, value: T | null, groupId: string): void;
    deleteFromGroup(key: string, groupId: string): void;
    clear(): void;
    getExpirationTimeFromGroup(key: string, groupId: string): number | undefined;
}
export {};