Class: LogStash::Filters::MathFunctions::Power

Inherits:
Object
  • Object
show all
Includes:
Util::Loggable
Defined in:
lib/logstash/filters/math_functions.rb

Instance Method Summary collapse

Instance Method Details

#call(op1, op2) ⇒ Object 



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# File 'lib/logstash/filters/math_functions.rb', line 83

def call(op1, op2)
  op1 ** op2
end

#invalid?(op1, op2, event = nil) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/logstash/filters/math_functions.rb', line 87

def invalid?(op1, op2, event = nil)
  if op1.is_a?(Numeric) && op1 < 0 && !op2.integer?
    warning = "raising a negative number to a fractional exponent results in a complex number that cannot be stored in an event"
    if event
      # called from filter so log
      logger.warn(warning, "operand 1" => op1, "operand 2" => op2, "event" => event.to_hash)
      return true
    else
      # called from register don't log return warning for the error that is raised
      return warning
    end
  end
  nil
end

#name ⇒ Object 



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# File 'lib/logstash/filters/math_functions.rb', line 79

def name
  "power"
end