examples/src/python/misc/test_task_hook.py

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

#  Licensed to the Apache Software Foundation (ASF) under one
#  or more contributor license agreements.  See the NOTICE file
#  distributed with this work for additional information
#  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
#
#  Unless required by applicable law or agreed to in writing,
#  software distributed under the License is distributed on an
#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#  KIND, either express or implied.  See the License for the
#  specific language governing permissions and limitations
#  under the License.

'''module for example task hook'''
from collections import Counter
import logging

from heronpy.api.task_hook import ITaskHook

# pylint: disable=unused-argument
class TestTaskHook(ITaskHook):
  """TestTaskHook logs event information every 10000 times"""
  CONST = 10000

  def prepare(self, conf, context):
    self.logger = logging.getLogger()
    self.logger.info("In prepare of TestTaskHook")
    self.counter = Counter()

  # pylint: disable=no-self-use
  def clean_up(self):
    self.logger.info("In clean_up of TestTaskHook")

  def emit(self, emit_info):
    self.counter['emit'] += 1
    if self.counter['emit'] % self.CONST == 0:
      self.logger.info("TestTaskHook: emitted %s tuples", str(self.counter['emit']))

  def spout_ack(self, spout_ack_info):
    self.counter['sp_ack'] += 1
    if self.counter['sp_ack'] % self.CONST == 0:
      self.logger.info("TestTaskHook: spout acked %s tuples", str(self.counter['sp_ack']))

  def spout_fail(self, spout_fail_info):
    self.counter['sp_fail'] += 1
    if self.counter['sp_fail'] % self.CONST == 0:
      self.logger.info("TestTaskHook: spout failed %s tuples", str(self.counter['sp_fail']))

  def bolt_execute(self, bolt_execute_info):
    self.counter['bl_exec'] += 1
    if self.counter['bl_exec'] % self.CONST == 0:
      self.logger.info("TestTaskHook: bolt executed %s tuples", str(self.counter['bl_exec']))

  def bolt_ack(self, bolt_ack_info):
    self.counter['bl_ack'] += 1
    if self.counter['bl_ack'] % self.CONST == 0:
      self.logger.info("TestTaskHook: bolt acked %s tuples", str(self.counter['bl_ack']))

  def bolt_fail(self, bolt_fail_info):
    self.counter['bl_fail'] += 1
    if self.counter['bl_fail'] % self.CONST == 0:
      self.logger.info("TestTaskHook: bolt failed %s tuples", str(self.counter['bl_fail']))