import { Filter } from '@loopback/filter';
import { Class, Options } from '../common-types';
import { Entity, EntityData } from '../model';
import { Connector } from './connector';
/**
 * Key/Value operations for connector implementations
 */
export interface KVConnector<T extends Entity> extends Connector {
    /**
     * Delete an entry by key
     * @param modelClass - Model class
     * @param key - Key for the entry
     * @param options - Options for the operation
     * @returns Promise<true> if an entry is deleted for the id, otherwise
     * Promise<false>
     */
    delete(modelClass: Class<Entity>, key: string, options?: Options): Promise<boolean>;
    /**
     * Delete all entries
     * @param modelClass - Model class
     * @param options - Options for the operation
     * @returns A promise of the number of entries deleted
     */
    deleteAll(modelClass: Class<Entity>, options?: Options): Promise<number>;
    /**
     * Get an entry by key
     * @param modelClass - Model class
     * @param key - Key for the entry
     * @param options - Options for the operation
     * @returns A promise of the entry found for the key
     */
    get(modelClass: Class<Entity>, key: string, options?: Options): Promise<T>;
    /**
     * Set an entry with key/value
     * @param modelClass - Model class
     * @param key - Key for the entry
     * @param value - Value for the entry
     * @param options - Options for the operation
     * @returns Promise<true> if an entry is set for the key, otherwise
     * Promise<false>
     */
    set(modelClass: Class<Entity>, key: string, value: EntityData, options?: Options): Promise<boolean>;
    /**
     * Set up ttl for an entry by key
     * @param modelClass - Model class
     * @param key - Key for the entry
     * @param options - Options for the operation
     * @returns Promise<true> if an entry is configured for the key, otherwise
     * Promise<false>
     */
    expire(modelClass: Class<Entity>, key: string, ttl: number, options?: Options): Promise<boolean>;
    /**
     * Get ttl for an entry by key
     * @param modelClass - Model class
     * @param key - Key for the entry
     * @param ttl - Time to live in millisenconds
     * @param options - Options for the operation
     * @returns A promise of the TTL value
     */
    ttl?(modelClass: Class<Entity>, key: string, ttl: number, options?: Options): Promise<number>;
    /**
     * Fetch all keys
     * @param modelClass - Model class
     * @param key - Key for the entry
     * @param options - Options for the operation
     * @returns A promise of an array of keys for all entries
     */
    keys?(modelClass: Class<Entity>, options?: Options): Promise<string[]>;
    /**
     * Get an Iterator for matching keys
     * @param modelClass - Model class
     * @param filter - Matching filter
     * @param options - Options for the operation
     * @returns A promise of an iterator of entries
     */
    iterateKeys?(modelClass: Class<Entity>, filter?: Filter, options?: Options): Promise<Iterator<T>>;
}