setTimeout in firebase function

[Daesung Park]

I am making a game and would like to notify room members of timeout(game end) after a given time elapsed.

All logics are controlled inside firebase function; I am wondering setTimeout will work as expected.

When I tested with setTimeout, it works. But I am not sure if there is any problems.

Can I use setTimeout in firebase function? Or should I use a firebase queue or something else?

[Michael Bleigh]

You can use setTimeout, but you will continue to incur function execution cost while the timeout runs, and functions have a default max execution time of 60s.

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[Jacob Wenger]

If you just want to have a synced timer across a bunch of client devices, you don't need Cloud Functions at all. You can use the Realtime Database clock skew APIs (web, Android, iOS).

Cheers,

Jacob

On Wed, Apr 5, 2017 at 8:07 AM, 'Michael Bleigh' via Firebase Google Group <fireba...@googlegroups.com> wrote:

You can use setTimeout, but you will continue to incur function execution cost while the timeout runs, and functions have a default max execution time of 60s.

On Wed, Apr 5, 2017, 7:28 AM Daesung Park <gra...@gmail.com> wrote:

I am making a game and would like to notify room members of timeout(game end) after a given time elapsed.

All logics are controlled inside firebase function; I am wondering setTimeout will work as expected.

When I tested with setTimeout, it works. But I am not sure if there is any problems.

Can I use setTimeout in firebase function? Or should I use a firebase queue or something else?

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[Doug Stevenson]

I think the feature request hidden the original question is to have the ability to schedule a delayed trigger of a function after some arbitrary amount of time.  This would allow the server to trigger a timeout or some event rather than depending on clients to all do it accurately.  Pubsub schedules functions for ASAP execution, and using a cron scheduler gives you periodic execution, but we don't have anything to say "run this function x second from now".

Doug

On Wednesday, April 5, 2017 at 9:27:46 AM UTC-7, Jacob Wenger wrote:

If you just want to have a synced timer across a bunch of client devices, you don't need Cloud Functions at all. You can use the Realtime Database clock skew APIs (web, Android, iOS).

Cheers,

Jacob

On Wed, Apr 5, 2017 at 8:07 AM, 'Michael Bleigh' via Firebase Google Group <fireba...@googlegroups.com> wrote:

You can use setTimeout, but you will continue to incur function execution cost while the timeout runs, and functions have a default max execution time of 60s.

On Wed, Apr 5, 2017, 7:28 AM Daesung Park <gra...@gmail.com> wrote:

I am making a game and would like to notify room members of timeout(game end) after a given time elapsed.

All logics are controlled inside firebase function; I am wondering setTimeout will work as expected.

When I tested with setTimeout, it works. But I am not sure if there is any problems.

Can I use setTimeout in firebase function? Or should I use a firebase queue or something else?

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[Nick Okunew]

Cron and scheduled tasks are both sorely missing from GCP as a whole - the main use for firebase is the abilityy to defer tasks in time (as in this case) and to ensure that required functions have executed (in case a real time trigger failed)

[Daesung Park]

Do you mean "gameDuration" is also calculated as CPU-seconds? If so, I can't use setTimeout. 

  var gameDuration = 100000;

  setTimeout(function notifyTimeover() { }, gameDuration);

Thanks for the info.

Daesung

2017년 4월 6일 목요일 오전 12시 7분 25초 UTC+9, Michael Bleigh 님의 말:

[Damien Lebrun]

Google App Engine support cron jobs and queue with tasks that can be delayed. Hopefully it will be added to cloud function; AWS lambda support it in more direct way.

[Nick Okunew]

Indeed it does but it's fairly restrictive:
Minimum granularity is 1 minutes
It can only call a GAE app, not any endpoint in your cloud project
It had to be deployed on your default service

[Damien Lebrun]

On Saturday, 8 April 2017 15:56:55 UTC+1, Nick Okunew wrote:

Minimum granularity is 1 minutes

Does it apply to tasks? The optional countdown to run a task is in second:

https://cloud.google.com/appengine/docs/standard/python/refdocs/google.appengine.api.taskqueue#google.appengine.api.taskqueue.add

 

It can only call a GAE app, not any endpoint in your cloud project

You can create a cron job or a delayed task to notify anything via a google cloud pub/sub topic or a http request. You can keep that GAE app thin and use it as a proxy for other gcloud services.