/**
 * Created by Bohdan on Sep, 2021
 */
import { IQueryOptions, QueryValues, ClusterEvent, QueryResult } from '../types/PoolInterfaces';
import { Pool } from "../pool/Pool";
export declare class GaleraCluster {
    connected: boolean;
    private readonly _pools;
    /**
     * Get all pools
     * @internal
     */
    get pools(): Pool[];
    private readonly _useClusterHashing;
    private readonly _clusterHashing;
    private readonly _serviceNames;
    private readonly _errorRetryCount;
    private readonly _useRedis;
    private readonly _clusterName;
    private readonly _nullServiceName;
    /**
     * @param userSettings global user settings
     */
    constructor();
    /**
     * Sort pool ids for mix userSettings and autogenerated ids
     * @param pools pools passed in userSettings
     * @private
     */
    private _sortPoolIds;
    /**
     * Connect all cluster pools what created from host information in config
     */
    connect(): Promise<void>;
    /**
     * Enable hashing for cluster
     */
    private _enableHashing;
    /**
     * Disconnect all cluster pools
     */
    disconnect(): Promise<void>;
    /**
     * Connect to the event
     * @param event event name
     * @param callback function what will be called after emit
     */
    on(event: ClusterEvent, callback: (...args: any[]) => void): void;
    /**
     * Cluster mysql query
     * @param sql MySQL query
     * @param values values what passed in sql string
     * @param queryOptions params for configure query
     */
    query<T extends QueryResult>(sql: string, values?: QueryValues, queryOptions?: IQueryOptions): Promise<T>;
    /**
     * Query request to pool
     * @param sql MySQL query string
     * @param pool active pool
     * @param queryOptions options to configure query
     * @private
     */
    private _queryRequest;
    /**
     * Count max retry after error
     * @param maxRetry max retry count after error
     * @param activePoolsLength length active pools what passed the validator
     * @private
     */
    private _maxRetryCount;
    /**
     * Mix together values and sql string
     * @param sql MySQL query
     * @param values values to mix with sql
     * @private
     */
    private _formatSQL;
    /**
     * Get all active pools what passed the validator
     * @param serviceId serviceId of what need to hashing in the cluster
     * @private
     */
    private _getActivePools;
}