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tiennm99
8235c9602e
- modules may declare crons: [{ schedule, name, handler }]
- handler signature (event, { db, sql, env }) matches init context
- scheduled() export in src/index.js dispatches to matching handlers with fan-out and per-handler error isolation
- registry validates cron entries and collects into registry.crons
- wrangler.toml [triggers] crons must still be populated manually by module author
46 lines
1.5 KiB
JavaScript
46 lines
1.5 KiB
JavaScript
/**
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* @file cron-dispatcher — dispatches a Cloudflare scheduled event to all
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* matching module cron handlers.
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*
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* Design:
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* - Iterates registry.crons, filters by event.cron === entry.schedule.
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* - Wraps each handler invocation in try/catch so one failure cannot block
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* others (equivalent to Promise.allSettled fan-out via ctx.waitUntil).
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* - ctx.waitUntil is fire-and-forget from Workers' perspective; we wrap in
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* an async IIFE so errors are caught and logged rather than silently lost.
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*/
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import { createSqlStore } from "../db/create-sql-store.js";
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import { createStore } from "../db/create-store.js";
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/**
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* @param {any} event — Cloudflare ScheduledEvent (has .cron string).
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* @param {any} env
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* @param {{ waitUntil: (p: Promise<any>) => void }} ctx
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* @param {import("./registry.js").Registry} registry
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*/
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export function dispatchScheduled(event, env, ctx, registry) {
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const matching = registry.crons.filter((entry) => entry.schedule === event.cron);
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for (const entry of matching) {
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const handlerCtx = {
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db: createStore(entry.module.name, env),
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sql: createSqlStore(entry.module.name, env),
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env,
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};
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ctx.waitUntil(
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(async () => {
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try {
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await entry.handler(event, handlerCtx);
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} catch (err) {
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console.error(
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`[cron] handler "${entry.name}" (module "${entry.module.name}", schedule "${entry.schedule}") failed:`,
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err,
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);
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}
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})(),
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);
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}
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}
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