import { FException } from "../exception/index.js";
import { FExecutionContext } from "../execution_context/index.js";
/** Define some kind of Publish-Subscribe pattern. See https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern */
export interface FChannelSubscriber<TData, TEvent extends FChannelSubscriber.Event<TData> = FChannelSubscriber.Event<TData>> {
    addHandler(cb: FChannelSubscriber.Callback<TData, TEvent>): void;
    removeHandler(cb: FChannelSubscriber.Callback<TData, TEvent>): void;
}
export declare namespace FChannelSubscriber {
    interface Event<TData> {
        readonly data: TData;
    }
    interface Callback<TData, TEvent extends Event<TData> = Event<TData>> {
        (executionContext: FExecutionContext, event: TEvent | FException): Promise<void>;
    }
}