Class: Circus::Processes::Daemontools

Inherits:
Object
  • Object
show all
Defined in:
lib/circus/processes/daemontools.rb

Overview

Support for working with Daemontools

Instance Method Summary collapse

Instance Method Details

#await_service_pause(name, working_dir, logger) ⇒ Object 



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# File 'lib/circus/processes/daemontools.rb', line 40

def await_service_pause(name, working_dir, logger)
  logger.info("Waiting for shutdown of #{name}")

  (1..5).each do |i|
    return true unless is_service_running?(working_dir)
    sleep 1
  end

  (1..100).each do |i|
    # Attempt a more brutal shutdown
    `svc -k #{working_dir}`
    
    return true unless is_service_running?(working_dir)
    sleep 1
  end
  
  return false
end

#await_service_startup(name, working_dir, logger) ⇒ Object 



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# File 'lib/circus/processes/daemontools.rb', line 29

def await_service_startup(name, working_dir, logger)
  logger.info("Waiting for startup of #{name}")
  
  (1..100).each do |i|
    return true if is_service_running?(working_dir)
    sleep 1
  end
  
  return false
end

#is_service_running?(working_dir) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/circus/processes/daemontools.rb', line 59

def is_service_running?(working_dir)
  res = `svstat #{working_dir}`
  $? == 0 && res.include?('up (pid')
end

#pause_service(name, working_dir, logger) ⇒ Object 



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# File 'lib/circus/processes/daemontools.rb', line 5

def pause_service(name, working_dir, logger)
  res = `svc -d #{working_dir}`
  if $? != 0
    logger.error("Failed to initiate service shutdown for #{name}")
    return
  end
  
  unless await_service_pause(name, working_dir, logger)
    logger.error("Service did not shutdown")
  end
end

#resume_service(name, working_dir, logger) ⇒ Object 



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# File 'lib/circus/processes/daemontools.rb', line 17

def resume_service(name, working_dir, logger)
  res = `svc -u #{working_dir}`
  if $? != 0
    logger.error("Failed to initiate service startup for #{name}")
    return
  end
  
  unless await_service_startup(name, working_dir, logger)
    logger.error("Service did not resume")
  end
end