Class: LogfileInterval::Aggregator::Delta

Inherits:
Base
  • Object
show all
Defined in:
lib/logfile_interval/aggregator/delta.rb

Instance Method Summary collapse

Methods inherited from Base

#value, #values

Constructor Details

#initialize ⇒ Delta

Returns a new instance of Delta.



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# File 'lib/logfile_interval/aggregator/delta.rb', line 4

def initialize
  @previous = Util::Counter.new
  super
end

Instance Method Details

#add(value, group_by = nil) ⇒ Object 



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# File 'lib/logfile_interval/aggregator/delta.rb', line 9

def add(value, group_by = nil)
  if @previous.has_key?(key(group_by))
    @val.add(key(group_by), @previous[key(group_by)] - value)
    @size.increment(key(group_by))
  end
  @previous.set(key(group_by), value)
end

#val(k) ⇒ Object 



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# File 'lib/logfile_interval/aggregator/delta.rb', line 17

def val(k)
  average(k)
end