How to declare cronjob in Hono??

[dnguyenfs]

How can I create cronjob in Hono guys?

[yusukebe]

I'm not sure what you meant by "cronjob", but Hono is a slim framework, almost like a router, so it doesn't have a cron function.

However, if you were referring to Cloudflare Triggers, you can write it as follows:

export default {
  fetch: app.fetch,
  async scheduled(event, env, ctx) {
    ctx.waitUntil(doSomeTaskOnASchedule())
  }
}

[r0ckerz]

Can you please provide more details here?
What are (event, env, ctx) types? Why is ctx.waitUntil used here instead of event.waitUntil?
Is it possible to pass down env.Bindings from the main app so that KVNamespace can be accessed in a scheduled task? What would be the best way to do that? Thanks!

[EyalRo]

I tried this, and it breaks the hono routes (getting error 500). It also fails to expose the Cloudflare /__scheduled

[exoup]

Can you please provide more details here? What are (event, env, ctx) types? Why is ctx.waitUntil used here instead of event.waitUntil? Is it possible to pass down env.Bindings from the main app so that KVNamespace can be accessed in a scheduled task? What would be the best way to do that? Thanks!

@r0ckerz The example seems to come from the Cloudflare Workers docs here, which explains a bit about the various parameters.

[EyalRo]

I got this working nicely with something like this (in typescript): note that cronTask is just a function called on the cron schedule. You can use whatever works for you. I use the waitUntil method so I can guarantee to finish the cronTask function processing before the cloud function is terminated (all of this is running on Cloudflare workers):

export default {
/** this part manages cronjobs */
  scheduled(
    event: ScheduledEvent,
    env: {
      DB?: any;
      SENDGRID_API_KEY: any;
    },
    ctx: ExecutionContext
  ) {
    const delayedProcessing = async () => {
      await cronTask(env);
    };
    ctx.waitUntil(delayedProcessing());
  },
/** this part manages regular REST */
  fetch(request: Request, env: Env, ctx: ExecutionContext) {
    return app.fetch(request, env, ctx);
  },
};

in plain JS this should look something like this (js code untested):

export default {
  scheduled(event, env, ctx) {
    const delayedProcessing = async () => {
      await cronTask(env)
    }
    ctx.waitUntil(delayedProcessing())
  },
  fetch(request, env, ctx) {
    return app.fetch(request, env, ctx)
  }
}

[exoup]

Very helpful. Thanks!