/// <reference types="node" />
import { Etcd3, Namespace, Watcher, Lock, IPutResponse, Lease } from 'etcd3';
import { Observable } from 'rxjs';
import { ResponseFormat } from '../interfaces';
export declare class Etcd3Service {
    private _manager;
    /**
     *
     * @member {string} _basePath The base path from which all future key will be added
     *
     */
    private _basePath;
    /**
     *
     * @member {Namespace} _client The client having the base path to not concat manually all entry keys
     *
     */
    private _client;
    constructor(_manager: any);
    /**
     *
     * @returns {string} The value of the base path
     *
     */
    readonly basePath: string;
    /**
     *
     * Retrieve the client without basePath consideration
     *
     * @returns {Namespace} the client for the namespace
     *
     */
    readonly client: Namespace;
    /**
     *
     * Retrieve the client without basePath consideration
     *
     * @returns {Etcd3} the normal client (without namespace consideration)
     *
     */
    etcd3Client(): Etcd3;
    /******************************************************************************************
     *
     *  KV operations
     *
     ******************************************************************************************/
    /**
     *
     * Get the value stored at path `key`.
     *
     * @param {string} key The key you want to retrieve the value
     * @param {ResponseFormat} format The format you want for the result (default is string)
     *
     * @returns {string | object | number | Buffer | null | Error} The value of the object stored
     *
     */
    get(key: string, format?: ResponseFormat): Observable<string | object | Buffer | null | Error>;
    /**
     *
     * Append the value `value` at path `key`.
     *
     * @param {string} key The key you want to retrieve the value
     * @param {string | Buffer | number} value The format you want for the result (default is string)
     *
     * @returns {IPutResponse} The result of the operation
     *
     */
    put(key: string, value: string | number | Object | Buffer): Observable<IPutResponse>;
    /******************************************************************************************
     *
     *  Watch operations
     *
     ******************************************************************************************/
    /**
     *
     * Create a watcher for a specific key.
     *
     * @param {string} key The key you want to watch
     *
     * @returns {Watcher} The watcher instance created
     *
     */
    createWatcher(key: string): Observable<Watcher>;
    /******************************************************************************************
     *
     *  Lock operations
     *
     ******************************************************************************************/
    /**
     *
     * Create and acquire a lock for a key `key` specifying a ttl.
     * It will automatically contact etcd to keep the connection live.
     * When the connection is broken (end of process or lock released),
     * the TTL is the time after when the lock will be released.
     *
     * @param {string} key The key
     * @param {number} ttl The TTL value in seconds. Default value is 1
     *
     * @returns {Lock} The lock instance created
     *
     */
    acquireLock(key: string, ttl?: number): Observable<Lock>;
    /******************************************************************************************
     *
     * Lease Operations
     *
     ******************************************************************************************/
    /**
     *
     * Create a lease object with a ttl.
     * The lease is automatically keeping alive until it is close.
     *
     * @param {number} ttl The TTL value in seconds. Default value is 1
     *
     * @returns {Lease} The lease instance created
     *
     */
    createLease(ttl?: number): Observable<Lease>;
    /**
     *
     * Create a lease object with a ttl and attach directly a key-value to it.
     * The lease is automatically keeping alive until it is close.
     *
     * NOTE: Once the lease is closed, the key-value will be destroyed by etcd.
     *
     * @param {string} key The key where to store the value
     * @param {string | Buffer | number} value The value that will be stored at `key` path
     * @param {number} ttl The TTL value in seconds. Default value is 1
     *
     * @returns {Lease} The lease instance created
     *
     */
    createLeaseWithValue(key: string, value: string | Buffer, ttl?: number): Observable<Lease>;
}