gistfile1.txt

#!/usr/bin/env ruby

require File.dirname(__FILE__) + "/../../config/environment"

$running = true
$working = false

Signal.trap("TERM") do
  $stderr.puts "#{Time.now.to_s(:db)}\tGot TERM, exiting..."
  $running = false
  if $working
    $stderr.puts "#{Time.now.to_s(:db)}\tWaiting for the worker to finish..." if $working
  else
    exit(0)
  end
end

Signal.trap("INT") do
  $stderr.puts "#{Time.now.to_s(:db)}\tGot INT, exiting right now..."
  $running = false
  exit(0)
end

while($running) do
  
  begin

      #
      # doing something not critical and potentially time-consuming here,
      # like waiting for a message to appear on the queue, etc - we can
      # stop doing it at any time without problems
      #

      $working = true

      #
      # here comes the critical stuff - we don't want it to be interrupted
      # and forcibly killed by signals, etc
      #

  rescue SystemExit => e
    # we don't want to report these exceptions to Exceptional, just print them
    $stderr.puts "#{Time.now.to_s(:db)}\t#{ e } (#{ e.class })!"
  rescue Exception => e
    # All other exceptions must be reported up to Exceptional
    Exceptional.catch(e) if Exceptional.enabled?
    # and printed into the error log
    $stderr.puts "#{Time.now.to_s(:db)}\t#{ e } (#{ e.class })!"
    $stderr.puts e.backtrace
  ensure
    # reset the working flag and wait a bit
    $working = false
    sleep 1
  end
  
end