49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import print_function
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import sys
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from pyspark import SparkContext
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from pyspark.streaming.kafka import KafkaUtils
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from pyspark.streaming import StreamingContext
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def main():
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if len(sys.argv) != 4:
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print("Usage: kafka_wordcount.py <zk> <topic> <timeout>",
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file=sys.stderr)
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exit(-1)
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sc = SparkContext(appName="PythonStreamingKafkaWordCount")
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ssc = StreamingContext(sc, 1)
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timeout = None
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if len(sys.argv) == 4:
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zk, topic, timeout = sys.argv[1:]
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timeout = int(timeout)
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else:
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zk, topic = sys.argv[1:]
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kvs = KafkaUtils.createStream(
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ssc, zk, "spark-streaming-consumer", {topic: 1})
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lines = kvs.map(lambda x: x[1])
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counts = lines.flatMap(lambda line: (line.split(" "))
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.map(lambda word: (word, 1))
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.reduceByKey(lambda a, b: a+b))
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counts.pprint()
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kwargs = {}
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if timeout:
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kwargs['timeout'] = timeout
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ssc.start()
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ssc.awaitTermination(**kwargs)
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