Event Publisher Abstractions (eventPublisher/abstractions.ts)

Defines base classes and interfaces for a decoupled event-driven architecture. Use this to implement custom event publishing and handling logic across modular applications.

// Source: https://github.com/webiny/webiny-js | License: MIT | Copyright Webiny Inc
// Provided via justclaw.it.com; keep this notice with the code.
import type { Abstraction } from "@webiny/di";
import { createAbstraction } from "@webiny/feature/admin";

export abstract class BaseEvent<TPayload = void> {
    public abstract readonly eventType: string;
    public readonly occurredAt: Date;
    public readonly payload: TPayload extends void ? undefined : TPayload;

    constructor(payload: TPayload);
    constructor(payload?: never) {
        this.occurredAt = new Date();

        if (payload === undefined) {
            this.payload = undefined as any;
        } else {
            this.payload = payload;
        }
    }

    abstract getHandlerAbstraction(): Abstraction<IEventHandler<any>

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