| #!/usr/bin/env python3 |
| # -*- 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 bolt: CountBolt""" |
| from collections import Counter |
| import heronpy.api.global_metrics as global_metrics |
| from heronpy.api.bolt.bolt import Bolt |
| |
| # pylint: disable=unused-argument |
| class CountBolt(Bolt): |
| """CountBolt""" |
| # output field declarer |
| #outputs = ['word', 'count'] |
| |
| def initialize(self, config, context): |
| self.logger.info("In prepare() of CountBolt") |
| self.counter = Counter() |
| self.total = 0 |
| |
| self.logger.info("Component-specific config: \n%s" % str(config)) |
| self.logger.info("Context: \n%s" % str(context)) |
| |
| def _increment(self, word, inc_by): |
| self.counter[word] += inc_by |
| self.total += inc_by |
| |
| def process(self, tup): |
| word = tup.values[0] |
| self._increment(word, 10 if word == "heron" else 1) |
| global_metrics.safe_incr('count') |
| self.ack(tup) |
| |
| def process_tick(self, tup): |
| self.log("Got tick tuple!") |
| self.log("Current map: %s" % str(self.counter)) |
