import { DomainEvent } from "../domain/domain-event";
export interface DomainEventConsumer<TEvent extends DomainEvent = DomainEvent> {
    handle(event: TEvent): Promise<void> | void;
}
export declare abstract class DomainEventBus {
    static readonly Token = "DomainEventBus";
    abstract publish(event: DomainEvent): Promise<void>;
    abstract subscribe<TEvent extends DomainEvent>(eventType: new (...args: unknown[]) => TEvent, consumer: DomainEventConsumer<TEvent>): Promise<void> | void;
}
export declare class InMemoryDomainEventBus extends DomainEventBus {
    private readonly subscribers;
    publish(event: DomainEvent): Promise<void>;
    subscribe<TEvent extends DomainEvent>(eventType: new (...args: unknown[]) => TEvent, consumer: DomainEventConsumer<TEvent>): void;
    consumerCount(eventType: new (...args: unknown[]) => DomainEvent): number;
}