Matt Bruce
bed1169443
- Full-featured monitoring dashboard for local web apps - Real-time status tracking with uptime percentages - Visual sparklines for status history - Add/Edit/Delete apps dynamically - Categories and color coding - Auto-refresh every 30 seconds - API endpoints for apps and status management
56 lines
2.0 KiB
JavaScript
56 lines
2.0 KiB
JavaScript
import { InvariantError } from '../../shared/lib/invariant-error';
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/**
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* Provides a `waitUntil` implementation which gathers promises to be awaited later (via {@link AwaiterMulti.awaiting}).
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* Unlike a simple `Promise.all`, {@link AwaiterMulti} works recursively --
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* if a promise passed to {@link AwaiterMulti.waitUntil} calls `waitUntil` again,
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* that second promise will also be awaited.
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*/ export class AwaiterMulti {
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constructor({ onError } = {}){
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this.promises = new Set();
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this.waitUntil = (promise)=>{
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// if a promise settles before we await it, we should drop it --
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// storing them indefinitely could result in a memory leak.
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const cleanup = ()=>{
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this.promises.delete(promise);
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};
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promise.then(cleanup, (err)=>{
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cleanup();
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this.onError(err);
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});
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this.promises.add(promise);
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};
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this.onError = onError ?? console.error;
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}
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async awaiting() {
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while(this.promises.size > 0){
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const promises = Array.from(this.promises);
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this.promises.clear();
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await Promise.allSettled(promises);
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}
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}
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}
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/**
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* Like {@link AwaiterMulti}, but can only be awaited once.
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* If {@link AwaiterOnce.waitUntil} is called after that, it will throw.
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*/ export class AwaiterOnce {
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constructor(options = {}){
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this.done = false;
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this.waitUntil = (promise)=>{
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if (this.done) {
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throw new InvariantError('Cannot call waitUntil() on an AwaiterOnce that was already awaited');
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}
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return this.awaiter.waitUntil(promise);
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};
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this.awaiter = new AwaiterMulti(options);
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}
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async awaiting() {
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if (!this.pending) {
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this.pending = this.awaiter.awaiting().finally(()=>{
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this.done = true;
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});
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}
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return this.pending;
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}
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}
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//# sourceMappingURL=awaiter.js.map
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