Module: SqsImageProcessor::ProcessManager

Defined in:
lib/sqs_image_processor/process_manager.rb

Class Method Summary collapse

Class Method Details

.generate_child_pid_file(pid) ⇒ Object 



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# File 'lib/sqs_image_processor/process_manager.rb', line 47

def self.generate_child_pid_file( pid )
  File.open("/tmp/sqs_image_processor_manager/#{pid}.pid", 'w') {|f|
    f.write(pid)
  }
end

.generate_pid_file ⇒ Object 



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# File 'lib/sqs_image_processor/process_manager.rb', line 40

def self.generate_pid_file
  FileUtils.mkdir_p '/tmp/sqs_image_processor'
  File.open("/tmp/sqs_image_processor.pid", 'w') {|f|
    f.write(Process.pid)
  }
end

.get_pid ⇒ Object 



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# File 'lib/sqs_image_processor/process_manager.rb', line 53

def self.get_pid
  pid = File.open("/tmp/sqs_image_processor_manager.pid", 'a+') {|f| f.read }.to_i
end

.is_running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sqs_image_processor/process_manager.rb', line 31

def self.is_running?
  pid = File.open("/tmp/sqs_image_processor.pid", 'a+') {|f| f.read }.to_i
  if pid == 0 || !self.pid_is_running?(pid)
    false
  else
    true
  end
end

.kill ⇒ Object 



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# File 'lib/sqs_image_processor/process_manager.rb', line 14

def self.kill
  if self.is_running?
    pid = File.open("/tmp/sqs_image_processor.pid", 'a+') {|f| f.read }.to_i
    Process.kill("KILL", pid)
    Dir.foreach('/tmp/sqs_image_processor') do |item|
      next if item == '.' or item == '..'
      begin
        Process.kill("KILL", item.gsub('.pid','').to_i)
      rescue
      end
    end
    puts "Stopped instance of SqsImageProcessor."
  else
    puts "Error: SqsImageProcessor isn't running."
  end
end

.pid_is_running?(pid) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sqs_image_processor/process_manager.rb', line 5

def self.pid_is_running?( pid )
  begin
    Process.getpgid( pid.to_i )
    true
  rescue Errno::ESRCH
    false
  end
end