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

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#  or more contributor license agreements.  See the NOTICE file
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#  regarding copyright ownership.  The ASF licenses this file
#  to you under the Apache License, Version 2.0 (the
#  "License"); you may not use this file except in compliance
#  with the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
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"""Word spout with error streams"""

from itertools import cycle
from heronpy.api.spout.spout import Spout
from heronpy.api.stream import Stream

class MultiStreamSpout(Spout):
  """WordSpout: emits a set of words repeatedly"""
  # output field declarer
  outputs = ['word', Stream(fields=['error_msg'], name='error')]

  def initialize(self, config, context):
    self.logger.info("In initialize() of WordSpout")
    self.words = cycle(["hello", "bye", "good", "bad", "heron", "storm"])

    self.emit_count = 0

    self.logger.info("Component-specific config: \n%s" % str(config))
    self.logger.info("Context: \n%s" % str(context))

  def next_tuple(self):
    word = next(self.words)
    self.emit([word])
    self.emit_count += 1

    if self.emit_count % 100000 == 0:
      self.logger.info("Emitted %s" % str(self.emit_count))
      self.logger.info("Emitting to error stream")
      self.emit(["test error message"], stream='error')