| #!/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. |
| |
| '''Example WindowSizeTopology''' |
| import sys |
| |
| import heronpy.api.api_constants as constants |
| from heronpy.api.topology import TopologyBuilder |
| from heronpy.api.stream import Grouping |
| from heronpy.api.bolt.window_bolt import SlidingWindowBolt |
| from heron.examples.src.python.spout import WordSpout |
| from examples.src.python.bolt import WindowSizeBolt |
| |
| # Topology is defined using a topology builder |
| # Refer to multi_stream_topology for defining a topology by subclassing Topology |
| # pylint: disable=superfluous-parens |
| if __name__ == '__main__': |
| if len(sys.argv) != 2: |
| print("Topology's name is not specified") |
| sys.exit(1) |
| |
| builder = TopologyBuilder(name=sys.argv[1]) |
| |
| word_spout = builder.add_spout("word_spout", WordSpout, par=2) |
| count_bolt = builder.add_bolt("count_bolt", WindowSizeBolt, par=2, |
| inputs={word_spout: Grouping.fields('word')}, |
| config={SlidingWindowBolt.WINDOW_DURATION_SECS: 10, |
| SlidingWindowBolt.WINDOW_SLIDEINTERVAL_SECS: 2}) |
| |
| topology_config = {constants.TOPOLOGY_RELIABILITY_MODE: |
| constants.TopologyReliabilityMode.ATLEAST_ONCE} |
| builder.set_config(topology_config) |
| |
| builder.build_and_submit() |