import { InjectionToken } from "@angular/core";
import { Observable } from "rxjs";
/**
 * command
 * @description T is response type
 */
export interface ICommand<T = any> {
    name: string;
}
/**
 * Handler
 */
export interface ICommandHandler<T extends ICommand, K = any> {
    commandName: string;
    /**
     * handle command
     * @param args args
     */
    handle(command: T): Observable<K>;
}
/**
 * command handler token
 */
export declare const COMMAND_HANDLERS_TOKEN: InjectionToken<ICommandHandler<ICommand<any>, any>>;
/**
 * Notification
 * @description no return value
 */
export interface INotification<TArgs = any> {
}
/**
 * notification handler
 */
export interface INotificationHandler<TArgs = any> {
    /**
     * notification handler
     * @param notification notification
     */
    handle(notification: INotification<TArgs>): Observable<void>;
}
export interface IMediator {
    /**
     * send request
     * @param request request
     */
    send<T = any>(request: ICommand<T>): Observable<T>;
    /**
     * dispatch a message
     * @param message notification message
     */
    publish(message: INotification): Observable<void>;
}