export interface Constructable<T = {}> {
    new (...args: any[]): T;
}
export declare type EventIdentifier<T> = (Constructable<T>);
export declare type JsonizableType = number | string | JsonizableInterface | Array<JsonizableInterface> | {
    toJSON: (arg: string) => string;
};
export interface JsonizableInterface {
    [key: string]: JsonizableType;
}
export interface Serializable {
    serialize(): JsonizableInterface;
}
export declare type EventSubscriptionCallbackReturnType = Promise<void | Error> | void;
export declare type EventSubscriptionCallback<T = {}> = (event: T) => EventSubscriptionCallbackReturnType;
export declare type EventCallbacksSet<T> = Set<EventSubscriptionCallback<T>>;
export interface IEventBus<T = {}> {
    publish(event: T): Promise<(void | Error)[] | void>;
    on(event: Constructable<T>, callback: EventSubscriptionCallback<T>): void;
}
export declare type IMiddleware<T = {}> = (item: T) => Promise<T | void> | T | void;
export interface PipelinePlan<T> {
    preserveOrder: boolean;
    payloads: T[];
}
export interface ScheduledPlan<T> {
    plan: PipelinePlan<T>[];
    rebuildOrder: (results: Array<any[]>) => any[];
}
export interface IScheduler<T> {
    schedule(items: T[], maxConcurrency?: number): ScheduledPlan<T>;
}
export declare type ErrorLogger = (...args: unknown[]) => void;
export interface IDispatcher<T> {
    on<T1 extends T>(eventType: Constructable<T1>, callback: EventSubscriptionCallback<T1>): void;
    onAny(callback: EventSubscriptionCallback<T>): void;
    trigger(event: T): Promise<void>;
    off<T1 extends T>(eventType: Constructable<T1>, callback?: EventSubscriptionCallback<T1>): void;
}
export declare type PipelineResult<T> = void | Array<{
    event: T;
    error: Error;
}>;
export declare type PipelineExecutionResult<T> = Promise<PipelineResult<T>>;
export interface IPipeline<T> {
    executeStopOnError(events: T[]): PipelineExecutionResult<T>;
    executeContinueOnError(events: T[]): PipelineExecutionResult<T>;
}
export declare type PipelineFactory<T> = (scheduler: IDispatcher<T>) => IPipeline<T>;