import { BehaviorSubject, Observable, Subscription } from "rxjs";
/**
 * A fallback if WebSockets doesn't work so we can't use the Watcher on a cluster
 * lets just poll in the background
 */
export declare class Poller<L> {
    protected pollListFactory: () => Observable<L>;
    private _dataStream;
    protected subscription: Subscription;
    protected pollPeriod: number;
    protected resourceCache: {};
    constructor(pollListFactory: () => Observable<L>, _dataStream: BehaviorSubject<any>);
    readonly dataStream: Observable<L>;
    /**
     * Forces recreation of the poller
     */
    recreate(): void;
    close(): void;
    protected closeSubscription(): void;
    protected lazyCreateSubscription(): void;
    protected onSubscriptionClosed(): void;
    ngOnDestroy(): void;
    private onListMessage(list);
}
export declare function isNewerResource(resource: any, old: any): boolean;