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-rw-r--r--examples/src/main/python/streaming/mqtt_wordcount.py58
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diff --git a/examples/src/main/python/streaming/mqtt_wordcount.py b/examples/src/main/python/streaming/mqtt_wordcount.py
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+#
+# 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.
+#
+
+"""
+ A sample wordcount with MqttStream stream
+ Usage: mqtt_wordcount.py <broker url> <topic>
+
+ To run this in your local machine, you need to setup a MQTT broker and publisher first,
+ Mosquitto is one of the open source MQTT Brokers, see
+ http://mosquitto.org/
+ Eclipse paho project provides number of clients and utilities for working with MQTT, see
+ http://www.eclipse.org/paho/#getting-started
+
+ and then run the example
+ `$ bin/spark-submit --jars external/mqtt-assembly/target/scala-*/\
+ spark-streaming-mqtt-assembly-*.jar examples/src/main/python/streaming/mqtt_wordcount.py \
+ tcp://localhost:1883 foo`
+"""
+
+import sys
+
+from pyspark import SparkContext
+from pyspark.streaming import StreamingContext
+from pyspark.streaming.mqtt import MQTTUtils
+
+if __name__ == "__main__":
+ if len(sys.argv) != 3:
+ print >> sys.stderr, "Usage: mqtt_wordcount.py <broker url> <topic>"
+ exit(-1)
+
+ sc = SparkContext(appName="PythonStreamingMQTTWordCount")
+ ssc = StreamingContext(sc, 1)
+
+ brokerUrl = sys.argv[1]
+ topic = sys.argv[2]
+
+ lines = MQTTUtils.createStream(ssc, brokerUrl, topic)
+ counts = lines.flatMap(lambda line: line.split(" ")) \
+ .map(lambda word: (word, 1)) \
+ .reduceByKey(lambda a, b: a+b)
+ counts.pprint()
+
+ ssc.start()
+ ssc.awaitTermination()