Class: MainLoop::ProcessHandler

Inherits:
Handler
  • Object
show all
Defined in:
lib/main_loop/process_handler.rb

Instance Attribute Summary collapse

Attributes inherited from Handler

#dispatcher, #logger, #name

Instance Method Summary collapse

Methods inherited from Handler

#finished?, #handle_retry, #on_term, #publish, #running?, #success?, #terminating?

Constructor Details

#initialize(dispatcher, name, **kwargs, &block) ⇒ ProcessHandler

Returns a new instance of ProcessHandler.



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# File 'lib/main_loop/process_handler.rb', line 8

def initialize(dispatcher, name, **kwargs, &block)
  super
  @handler_type = 'Process'
  @pid = nil
  dispatcher.add_handler(self)

  run(&block) if block_given?
end

Instance Attribute Details

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/main_loop/process_handler.rb', line 6

def pid
  @pid
end

Instance Method Details

#id ⇒ Object 



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# File 'lib/main_loop/process_handler.rb', line 17

def id
  @pid
end

#kill ⇒ Object 



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# File 'lib/main_loop/process_handler.rb', line 51

def kill
  unless @pid
    logger.debug "Process[#{name}] alredy Killed. Skipped."
    return
  end

  @success = false
  logger.info "Process[#{name}] send kill: Pid:#{@pid}"
  ::Process.kill('KILL', @pid) rescue nil
end

#reap(status) ⇒ Object 



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# File 'lib/main_loop/process_handler.rb', line 21

def reap(status)
  logger.info "Process[#{name}] exited: Pid:#{@pid} Status: #{status.exitstatus.inspect} Termsig: #{status.termsig.inspect} Success: #{status.success?}"
  @pid = nil
  @finished = true
  @success = !!status.success?

  return if terminating?

  handle_retry
end

#run(&block) ⇒ Object 



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# File 'lib/main_loop/process_handler.rb', line 62

def run(&block)
  return if terminating?

  @block = block
  start_fork(&@block)
end

#term ⇒ Object 



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# File 'lib/main_loop/process_handler.rb', line 32

def term
  unless @pid
    @terminating_at ||= Time.now
    logger.debug "Process[#{name}] alredy terminated. Skipped."
    return
  end

  if terminating?
    @success = false
    logger.info "Process[#{name}] send force terminate: KILL Pid:#{@pid}"
    ::Process.kill('KILL', @pid) rescue nil
  else
    @terminating_at ||= Time.now
    logger.info "Process[#{name}] send terminate: Pid:#{@pid}"
    @on_term&.call(@pid) rescue nil
    ::Process.kill('TERM', @pid) rescue nil
  end
end