Daemons

ruby-talk
1

Hi,

I've got a process I'd like to daemonize, a call the twitter search API ever 10 minutes or so. There seem to be a few gems that purport to make this process easier and I was wondering if anyone could recommend (or tell me to avoid) any? Or just any tips to watch out for.

Any help is much appreciated.

Regards,
Iain

2

Iain Barnett wrote in post #968104:

Hi,

I've got a process I'd like to daemonize, a call the twitter search API
ever 10 minutes or so. There seem to be a few gems that purport to make
this process easier and I was wondering if anyone could recommend (or
tell me to avoid) any? Or just any tips to watch out for.

The Daemons gem is good, but if you don't need anything fancy then
it's not much code to do it yourself:

    # File lib/webrick/server.rb, line 28
    def Daemon.start
      exit!(0) if fork
      Process::setsid
      exit!(0) if fork
      Dir::chdir("/")
      File::umask(0)
      STDIN.reopen("/dev/null")
      STDOUT.reopen("/dev/null", "w")
      STDERR.reopen("/dev/null", "w")
      yield if block_given?
    end

···

--
Alex

--
Posted via http://www.ruby-forum.com/\.

3

Also take a look at the 'servolux' gem.

    servolux | RubyGems.org | your community gem host

enjoy,

-jeremy

···

On Tue, Dec 14, 2010 at 02:21:21AM +0900, Iain Barnett wrote:

Hi,

I've got a process I'd like to daemonize, a call the twitter search API ever 10 minutes or so. There seem to be a few gems that purport to make this process easier and I was wondering if anyone could recommend (or tell me to avoid) any? Or just any tips to watch out for.

Any help is much appreciated.

Regards,
Iain

--

Jeremy Hinegardner jeremy@hinegardner.org

4

Iain Barnett wrote in post #968104:

Hi,

I've got a process I'd like to daemonize, a call the twitter search API
ever 10 minutes or so. There seem to be a few gems that purport to make
this process easier and I was wondering if anyone could recommend (or
tell me to avoid) any? Or just any tips to watch out for.

The Daemons gem is good, but if you don't need anything fancy then
it's not much code to do it yourself:

   # File lib/webrick/server.rb, line 28
   def Daemon.start
     exit!(0) if fork
     Process::setsid
     exit!(0) if fork
     Dir::chdir("/")
     File::umask(0)
     STDIN.reopen("/dev/null")
     STDOUT.reopen("/dev/null", "w")
     STDERR.reopen("/dev/null", "w")
     yield if block_given?
   end

--
Alex

--
Posted via http://www.ruby-forum.com/\.

Thanks Alex, I'll give both that gem and the code a good look!

Regards,
Iain

···

On 13 Dec 2010, at 17:44, Alex Young wrote:

5

require 'servolux'

daemon = Servolux::Daemon.new(
  :name => 'Twitter Search',
  :pid_file => '/path/to/the/pid/file.pid',
  :startup_command => '/path/to/your/twitter/process'
)
daemon.startup

There are some example files demonstrating how to accomplish various tasks:

And the documentation is fairly thorough:
http://rdoc.info/github/TwP/servolux/master/frames

Blessings,
TwP

PS Being the author of servolux, my opinion is completely biased :slight_smile:

···

On Dec 19, 2010, at 1:18 PM, Jeremy Hinegardner wrote:

On Tue, Dec 14, 2010 at 02:21:21AM +0900, Iain Barnett wrote:

Hi,

I've got a process I'd like to daemonize, a call the twitter search API ever 10 minutes or so. There seem to be a few gems that purport to make this process easier and I was wondering if anyone could recommend (or tell me to avoid) any? Or just any tips to watch out for.

Any help is much appreciated.

Regards,
Iain

Also take a look at the 'servolux' gem.

   servolux | RubyGems.org | your community gem host