integration_test/src/python/integration_test/topology/streamlet/word_count_streamlet.py

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

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'''Example WordCountTopology'''

import collections
import logging
import itertools
import time

from heronpy.streamlet.builder import Builder
from heronpy.streamlet.config import Config
from heronpy.streamlet.generator import Generator
from heronpy.streamlet.runner import Runner
from heronpy.streamlet.windowconfig import WindowConfig
from heronpy.connectors.mock.arraylooper import ArrayLooper
from integration_test.src.python.integration_test.core.test_runner import TestRunner

def word_count_streamlet_builder(topology_name, http_server_url):
  builder = Builder()
  sentences1 = ["Mary had a little lamb",
                "Humpy Dumpy sat on a wall"]
  sentences2 = ["Here we round the Moulberry bush"]
  source1 = builder.new_source(ArrayLooper(sentences1, sleep=1))
  source2 = builder.new_source(ArrayLooper(sentences2, sleep=1))
  stream1 = source1.flat_map(lambda line: line.split()) \
                   .map(lambda word: (word, 1))
  stream2 = source2.flat_map(lambda line: line.split()) \
                   .map(lambda word: (word, 1))
  stream1.union(stream2)
  runner = TestRunner()
  config = Config()
  return runner.run(topology_name, config, builder, http_server_url)