Class: Rapporteur::Checks::LoadCheck

Inherits:
Object
  • Object
show all
Extended by:
FFI::Library
Defined in:
lib/rapporteur/load_check.rb

Constant Summary collapse

DEFAULT_TOLERANCE = 
8.0

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tolerance = DEFAULT_TOLERANCE) ⇒ LoadCheck

Returns a new instance of LoadCheck.



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# File 'lib/rapporteur/load_check.rb', line 20

def initialize(tolerance=DEFAULT_TOLERANCE)
  @tolerance = tolerance
end

Class Method Details

.call(checker) ⇒ Object 



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# File 'lib/rapporteur/load_check.rb', line 35

def self.call(checker)
  new.call(checker)
end

.current_load ⇒ Object 



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# File 'lib/rapporteur/load_check.rb', line 39

def self.current_load
  loadavg = FFI::MemoryPointer.new(:double, 1)
  if getloadavg(loadavg, 1) == -1
    raise SystemCallError, "getloadavg() - #{strerror(FFI.errno)}"
  end
  loadavg.read_double
end

Instance Method Details

#call(checker) ⇒ Object 



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# File 'lib/rapporteur/load_check.rb', line 24

def call(checker)
  loadavg = self.class.current_load

  if loadavg > @tolerance
    checker.add_error(:load, :excessive, :tolerance => @tolerance, :value => loadavg)
    checker.halt!
  else
    checker.add_message(:load, loadavg)
  end
end