blob: c5de09e3978da565c7f4c99eb29063cd3c798547 [file] [log] [blame]
#!/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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'''Example WordCountTopology'''
import sys
import heronpy.api.api_constants as constants
from heronpy.api.topology import TopologyBuilder
from heronpy.api.stream import Grouping
from examples.src.python.spout import WordSpout
from examples.src.python.bolt import CountBolt
# 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", CountBolt, par=2,
inputs={word_spout: Grouping.fields('word')},
config={constants.TOPOLOGY_TICK_TUPLE_FREQ_SECS: 10})
topology_config = {constants.TOPOLOGY_RELIABILITY_MODE:
constants.TopologyReliabilityMode.ATLEAST_ONCE}
builder.set_config(topology_config)
builder.build_and_submit()