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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.
+#
+
+"""
+ Consumes messages from a Amazon Kinesis streams and does wordcount.
+
+ This example spins up 1 Kinesis Receiver per shard for the given stream.
+ It then starts pulling from the last checkpointed sequence number of the given stream.
+
+ Usage: kinesis_wordcount_asl.py <app-name> <stream-name> <endpoint-url> <region-name>
+ <app-name> is the name of the consumer app, used to track the read data in DynamoDB
+ <stream-name> name of the Kinesis stream (ie. mySparkStream)
+ <endpoint-url> endpoint of the Kinesis service
+ (e.g. https://kinesis.us-east-1.amazonaws.com)
+
+
+ Example:
+ # export AWS keys if necessary
+ $ export AWS_ACCESS_KEY_ID=<your-access-key>
+ $ export AWS_SECRET_KEY=<your-secret-key>
+
+ # run the example
+ $ bin/spark-submit -jar external/kinesis-asl/target/scala-*/\
+ spark-streaming-kinesis-asl-assembly_*.jar \
+ external/kinesis-asl/src/main/python/examples/streaming/kinesis_wordcount_asl.py \
+ myAppName mySparkStream https://kinesis.us-east-1.amazonaws.com
+
+ There is a companion helper class called KinesisWordProducerASL which puts dummy data
+ onto the Kinesis stream.
+
+ This code uses the DefaultAWSCredentialsProviderChain to find credentials
+ in the following order:
+ Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_KEY
+ Java System Properties - aws.accessKeyId and aws.secretKey
+ Credential profiles file - default location (~/.aws/credentials) shared by all AWS SDKs
+ Instance profile credentials - delivered through the Amazon EC2 metadata service
+ For more information, see
+ http://docs.aws.amazon.com/AWSSdkDocsJava/latest/DeveloperGuide/credentials.html
+
+ See http://spark.apache.org/docs/latest/streaming-kinesis-integration.html for more details on
+ the Kinesis Spark Streaming integration.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext
+from pyspark.streaming import StreamingContext
+from pyspark.streaming.kinesis import KinesisUtils, InitialPositionInStream
+
+if __name__ == "__main__":
+ if len(sys.argv) != 5:
+ print(
+ "Usage: kinesis_wordcount_asl.py <app-name> <stream-name> <endpoint-url> <region-name>",
+ file=sys.stderr)
+ sys.exit(-1)
+
+ sc = SparkContext(appName="PythonStreamingKinesisWordCountAsl")
+ ssc = StreamingContext(sc, 1)
+ appName, streamName, endpointUrl, regionName = sys.argv[1:]
+ lines = KinesisUtils.createStream(
+ ssc, appName, streamName, endpointUrl, regionName, InitialPositionInStream.LATEST, 2)
+ counts = lines.flatMap(lambda line: line.split(" ")) \
+ .map(lambda word: (word, 1)) \
+ .reduceByKey(lambda a, b: a+b)
+ counts.pprint()
+
+ ssc.start()
+ ssc.awaitTermination()