#!/usr/bin/env python
# -*- encoding: utf-8 -*-

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"""module for example bolt: WindowSizeBolt"""
from heronpy.api.bolt.window_bolt import SlidingWindowBolt

# pylint: disable=unused-argument
class WindowSizeBolt(SlidingWindowBolt):
  """WindowSizeBolt
     A bolt that calculates the average batch size of window"""

  def initialize(self, config, context):
    super(WindowSizeBolt, self).initialize(config, context)
    self.numerator = 0.0
    self.denominator = 0.0

  def processWindow(self, window_info, tuples):
    self.numerator += len(tuples)
    self.denominator += 1
    self.logger.info("The current average is %f" % (self.numerator / self.denominator))