import { BaseDriver } from '../base-driver';
export declare class MemoryDriver extends BaseDriver {
    private cacheMap;
    private betterLock;
    destroy(): Promise<void>;
    private getCacheInstance;
    get(baseKey: string, key: string): Promise<Buffer>;
    set(baseKey: string, key: string, value: Buffer, ttl: number): Promise<void>;
    del(baseKey: string, key: string): Promise<boolean>;
    keys(baseKey: string, prefix?: string): Promise<string[]>;
    clear(baseKey: string, prefix?: string): Promise<void>;
    lock<R>(keys: string[], cb: () => Promise<R>): Promise<R>;
    isFree(keys: string[]): Promise<boolean>;
    private queues;
    private backupQueues;
    private blockingGathers;
    private getQueue;
    private getBackupQueue;
    queueAdd(key: string, value: Buffer, prior?: boolean): Promise<void>;
    queueItems(key: string): Promise<Buffer[]>;
    queueGather(key: string): Promise<Buffer>;
    queueGatherBlocking(key: string): Promise<Buffer>;
    queueAck(key: string, value: Buffer): Promise<void>;
    queueResume(key: string, value: Buffer, prior?: boolean): Promise<void>;
    queueResumeAll(key: string, prior?: boolean): Promise<void>;
    queueClear(key: string): Promise<void>;
}