/**
 * This file is part of the @egodigital/egoose distribution.
 * Copyright (c) e.GO Digital GmbH, Aachen, Germany (https://www.e-go-digital.com/)
 *
 * @egodigital/egoose is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, version 3.
 *
 * @egodigital/egoose 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
import { CacheBase, SetCacheValueOptions } from './index';
/**
 * Options for redis cache (client).
 */
export interface RedisCacheOptions {
    /**
     * The custom host.
     */
    host?: string;
    /**
     * The custom TCP port.
     */
    port?: number;
}
/**
 * A Redis cache (client).
 */
export declare class RedisCache extends CacheBase {
    readonly options: RedisCacheOptions;
    /**
     * Initializes a new instance of that class.
     *
     * @param {RedisCacheOptions} options The options.
     */
    constructor(options: RedisCacheOptions);
    private createClient;
    /**
     * Creates a new instance from environment variable.
     *
     * @return {RedisCache} The new instance.
     */
    static fromEnvironment(): RedisCache;
    /** @inheritdoc */
    protected getInner(key: any, defaultValue: any): Promise<any>;
    /** @inheritdoc */
    protected setInner(key: any, value: any, opts: SetCacheValueOptions): Promise<void>;
    private withConnection;
}