#!/usr/bin/env python3
# -*- encoding: utf-8 -*-

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#  to you under the Apache License, Version 2.0 (the
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#
#    http://www.apache.org/licenses/LICENSE-2.0
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"""Count aggregator bolt"""

from ...core import BatchBolt

class CountAggregatorBolt(BatchBolt):
  """Bolt to count how many different words received"""
  outputs = ['sum']

  # pylint: disable=unused-argument
  def initialize(self, config, context):
    self.sum = 0

  def process(self, tup):
    self.sum += int(tup.values[0])

  def finish_batch(self):
    self.logger.info("In finish batch, emitting: %d" % self.sum)
    self.emit([self.sum])