46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
// @flow
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import { Document } from "../../models";
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import { globalEventQueue } from "../../queues";
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import type { Event } from "../../types";
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export default class DebounceProcessor {
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async on(event: Event) {
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switch (event.name) {
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case "documents.update": {
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globalEventQueue.add(
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{
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...event,
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name: "documents.update.delayed",
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},
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{
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delay: 5 * 60 * 1000,
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removeOnComplete: true,
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}
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);
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break;
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}
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case "documents.update.delayed": {
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const document = await Document.findByPk(event.documentId);
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// If the document has been deleted then prevent further processing
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if (!document) return;
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// If the document has been updated since we initially queued the delayed
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// event then abort, there must be another updated event in the queue –
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// this functions as a simple distributed debounce.
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if (document.updatedAt > new Date(event.createdAt)) return;
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globalEventQueue.add(
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{
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...event,
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name: "documents.update.debounced",
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},
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{ removeOnComplete: true }
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);
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break;
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}
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default:
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}
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}
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}
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