Class: Gouda::TrapShutdownCheck

Inherits:
Object
  • Object
show all
Defined in:
lib/gouda/worker.rb

Overview

Captures UNIX signals (TERM and INT) and then returns true. Once you initialize the this check you install signal handlers, meaning that the worker will not raise ‘Interrupt` from any theads but will get the space it needs to terminate cleanly. At least for SIGINT and SIGTERM this is very desirable. This is the default shutdown check.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TrapShutdownCheck

Returns a new instance of TrapShutdownCheck.



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# File 'lib/gouda/worker.rb', line 52

def initialize
  @did_trap = false
  @did_log = false
  Signal.trap(:TERM) do
    @did_trap = :TERM
  end
  Signal.trap(:INT) do
    @did_trap = :INT
  end
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/gouda/worker.rb', line 63

def call
  if @did_trap
    @did_log ||= begin
      warn("Gouda worker signaled to terminate via SIG#{@did_trap}")
      true
    end
    true
  else
    false
  end
end