How to run system commands before program start using Ruby GOD gem

Question

I use GOD to watch the process => rake resque:scheduler

Before run 'rake resque:scheduler ' I have to run rake resque_schedule:setup

But the following settings are not working.

I use the ps aux to list the process but the scheduler is not working as I expect.

It should generate tasks periodically.

If I type the 2 commands in shell, it works.

I have no ideas

God.watch do |w|


  system("rake resque_schedule:setup ") # run the rake to load environment

  w.name = 'resque-scheduler'
  w.interval = 5.seconds
  w.dir = File.expand_path(File.join(File.dirname(__FILE__),'..'))
  # w.start = "rake resque_schedule:setup ; rake resque:scheduler "
  w.start = "rake resque:scheduler "
  w.start_grace = 10.seconds
  w.log = File.expand_path(File.join(File.dirname(__FILE__), '.','log','resque-scheduler.log'))
  w.keepalive(:memory_max => 150.megabytes,
              :cpu_max => 50.percent)


end

why `system` command ? If you want to load the environment can that be done in simply way like `rake environment resque:scheduler` — Viren, Dec 04 '13 at 09:24

score 0 · Answer 1 · answered Nov 20 '13 at 09:53

0

You should call rake resque_schedule:setup before god.start call.

For example:

system("rake resque_schedule:setup")
god.start

answered Nov 20 '13 at 09:53

Amit Thawait

4,862
2
31
25

Is it still working when call system command before I kill the process ? – newBike Nov 20 '13 at 10:06
You mean.. You want to kill `resque_schedule:setup` when god process is killed ? – Amit Thawait Nov 20 '13 at 10:08
No. the GOD watches the `rake resque:scheduler`. if I kill the pid of `rake resque:scheduler`. Will the GOD run the ` system("rake resque_schedule:setup ")` before restart `rake resque:scheduler`. – newBike Nov 20 '13 at 10:12
I think that you have to do in `w.start_if` block. – Amit Thawait Nov 20 '13 at 10:17
Can you please try this (Concatenate both commands in one) : `w.start = "rake resque_schedule:setup; rake resque:scheduler"` – Amit Thawait Nov 20 '13 at 10:27
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/41523/discussion-between-amit-thawait-and-poc) – Amit Thawait Nov 20 '13 at 10:32

How to run system commands before program start using Ruby GOD gem

1 Answers1