import { HttpEvent } from './events';
import { HttpEventHandler, HttpEventClassType } from './types';
export declare class EventBus {
    private _subscriptions;
    /**
     * @constructor
     */
    constructor();
    /**
     * Gets the set of subscriptions associated with the provided http event class type.
     */
    private _ensureEventSubscriptionInit;
    /**
     * Gets the number of subscriptions for the given event.
     * @param {*} eventName
     */
    getEventSubscriptionsCount<PayloadT>(httpEventType: HttpEventClassType<PayloadT>): number;
    /**
     * Subscribes to an event.
     * @param {*} eventName
     * @param {*} handler
     */
    subscribe<PayloadT>(httpEventType: HttpEventClassType<PayloadT>, handler: HttpEventHandler<PayloadT>): () => void;
    /**
     * Publishes an event against to set of subscribers.
     * @param {*} eventName
     * @param {*} payload
     */
    publish<PayloadT>(httpEvent: HttpEvent<PayloadT>): void;
    /**
     * Deregister the handler for the event name.
     * @param {*} eventName
     * @param {*} subscription
     */
    unsubscribe<PayloadT>(httpEventType: HttpEventClassType<PayloadT>, handler: HttpEventHandler<PayloadT>): void;
    /**
     * Detaches all subscriptions for the given event.
     * @param {*} eventName
     */
    detachEventSubscriptions<PayloadT>(httpEventType: HttpEventClassType<PayloadT>): void;
    /**
     * Detaches the subscriptions for all registered events.
     */
    detachAll(): void;
}