import { Topic, TopicSettings } from "../../models";
/**
 * A message bus where messages can be published and subscribed to based on a path
 * @class MessageBus
 */
export declare class MessageBus {
    private static _subscribers;
    private static _subscriptionConfigs;
    /**
    * Publishes a message on the topic
    */
    static publish<T>(topic: Topic<T>, obj: T): void;
    /**
    * Clears the message cache for the topic
    */
    static clearCache<T>(topic: Topic<T>): number;
    /**
    * Subscribes to the specified Topic and triggers function when a message is published
    */
    static subscribe<T>(topic: Topic<T>, fn: (obj: T) => void): void;
    /**
    * Unsubscribes from the specified Topic
    */
    static unsubscribe<T>(topic: Topic<T>, fn: (obj: T) => void): void;
    /**
    * Creates a topic that messages can be published to, if topic already exists it will throw exception
    */
    static createTopic<T>(topic: Topic<T>, settings?: TopicSettings): void;
    /**
    * Creates a topic if it dosent exists, if it already exists it will ignore and continue without exception
    * @param topic
    * @param settings
    * @returns true/false created
    */
    static ensureTopic<T>(topic: Topic<T>, settings?: TopicSettings): boolean;
    /**
    * Returns true if the topic exists already
    */
    static topicExists<T>(topic: Topic<T>): boolean;
    /**
    * Builds the full path
    */
    private static buildTopicPath;
    /**
    * Ensures the subscribers array on the path
    */
    private static ensureSubscribers;
}