the best way to run cron jobs with fastify

Question

I had been using fastify-cron to run cron jobs with my fastify4 app. But, it seems the old fastify-cron plugin no longer is compatible with fastify5. What (if any) is the recommended way to run a fastify route periodically (once a day or once a week)?

Answer 1

You can use @fastify/schedule, a core Fastify plugin (meaning the Fastify team maintains it) that supports creating cron-style scheduling tasks.

See the code example below for running a task that prints a message to the console every 5 seconds:

import Fastify from "fastify";
import { fastifySchedule } from "@fastify/schedule";
import { CronJob, AsyncTask } from "toad-scheduler";

const app = Fastify({
  logger: true,
});

const task = new AsyncTask("simple task", async (taskId) => {
  console.log(`this is ${taskId} that runs every 5 seconds`, Date.now());
});

const job = new CronJob(
  {
    cronExpression: "*/5 * * * * *", // Runs every 5 seconds
  },
  task
);

app.register(fastifySchedule);

// `fastify.scheduler` becomes available after initialization.
app.ready().then(() => {
  app.scheduler.addCronJob(job);
});

app.listen({ host: "0.0.0.0", port: 3000 });