import { Observable } from 'rxjs';
import { DDP_COLLECTIONS } from './ddp-names';
export declare abstract class DDPCacheEngine {
    abstract getItem(key: string): Observable<any>;
    abstract setItem(key: string, value: any): any;
    abstract removeItem(key: string): any;
}
/**
 * DDPStorage
 */
export declare class DDPStorage {
    readonly lastSyncTime: Date;
    private _lastSyncTime;
    private _cacheEngine;
    private _collections;
    private _subjects;
    constructor();
    setCacheEngine(cacheEngine: DDPCacheEngine): void;
    loadFromCache(collectionsNames: DDP_COLLECTIONS[]): void;
    persistToStore(collectionsNames: DDP_COLLECTIONS[]): void;
    clearCache(collectionsNames: DDP_COLLECTIONS[]): void;
    getObservable(collectionName: DDP_COLLECTIONS): Observable<any>;
    getItem(collectionName: DDP_COLLECTIONS, id: any): any;
    insertItem(collectionName: DDP_COLLECTIONS, item: any): void;
    updateItem(collectionName: DDP_COLLECTIONS, id: any, item: any): void;
    removeItem(collectionName: DDP_COLLECTIONS, id: any): void;
    private _insertOrUpdate;
    private _getCollection;
    private _checkAndInitCollection;
}