/*!
 * RedisCache adapter implementation
 *
 * I'm Queue Software Project
 * Copyright (C) 2025  imqueue.com <support@imqueue.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * If you want to use this code in a closed source (commercial) project, you can
 * purchase a proprietary commercial license. Please contact us at
 * <support@imqueue.com> to get commercial licensing options.
 */
import { ICache } from '.';
import { ILogger, IRedisClient, IMQOptions } from '@imqueue/core';
export interface IRedisCacheOptions extends Partial<IMQOptions> {
    conn?: IRedisClient;
}
export declare const DEFAULT_REDIS_CACHE_OPTIONS: {
    prefix: string;
    cleanup: boolean;
    cleanupFilter: string;
    vendor?: string;
    logger?: ILogger;
    watcherCheckDelay?: number;
    useGzip?: boolean;
    safeDelivery?: boolean;
    safeDeliveryTtl?: number;
    cluster?: import("@imqueue/core").IMessageQueueConnection[];
    clusterManagers?: import("@imqueue/core/src/ClusterManager").ClusterManager[];
    verbose?: boolean;
    verboseExtended?: boolean;
    id?: string | undefined;
    host?: string | undefined;
    port?: number | undefined;
    username?: string | undefined;
    password?: string | undefined;
};
export declare const REDIS_CLIENT_INIT_ERROR = "Redis client is not initialized!";
/**
 * Class RedisCache. Implements cache engine over redis.
 */
export declare class RedisCache implements ICache {
    private static redis?;
    private logger;
    options: IRedisCacheOptions;
    name: string;
    ready: boolean;
    /**
     * Initializes cache instance
     *
     * @param {IRedisCacheOptions} [options]
     * @returns {Promise<RedisCache>}
     */
    init(options?: IRedisCacheOptions): Promise<RedisCache>;
    /**
     * Returns fully qualified key name for a given generic key
     *
     * @access private
     * @param {string} key
     * @returns {string}
     */
    private key;
    /**
     * Returns value stored in cache by a given key
     *
     * @param {string} key
     * @returns {Promise<any>}
     */
    get(key: string): Promise<any>;
    /**
     * Stores in cache given value under given key. If TTL is specified,
     * cached value will expire in a given number of milliseconds. If NX
     * argument set to true will create key:value in cache only if it does
     * not exist yet. Given value could be any JSON-compatible object and
     * will be serialized automatically.
     *
     * @param {string} key
     * @param {any} value
     * @param {number} ttl
     * @param {boolean} nx
     * @returns {Promise<boolean>}
     */
    set(key: string, value: any, ttl?: number, nx?: boolean): Promise<boolean>;
    /**
     * Removes stored in cache value under given key
     *
     * @param {string} key
     * @returns {Promise<boolean>}
     */
    del(key: string): Promise<boolean>;
    /**
     * Purges all keys from cache by a given wildcard mask
     *
     * @param {string} keyMask
     * @return {boolean}
     */
    purge(keyMask: string): Promise<boolean>;
    /**
     * Safely destroys redis connection
     *
     * @returns {Promise<void>}
     */
    static destroy(): Promise<void>;
}