Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/1434#discussion_r15722812
--- Diff:
examples/src/main/java/org/apache/spark/examples/streaming/JavaKinesisWordCountASL.java
---
@@ -0,0 +1,187 @@
+/*
+ * 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.
+ */
+package org.apache.spark.examples.streaming;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+import org.apache.log4j.Logger;
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.function.FlatMapFunction;
+import org.apache.spark.api.java.function.Function2;
+import org.apache.spark.api.java.function.PairFunction;
+import org.apache.spark.storage.StorageLevel;
+import org.apache.spark.streaming.Duration;
+import org.apache.spark.streaming.api.java.JavaDStream;
+import org.apache.spark.streaming.api.java.JavaPairDStream;
+import org.apache.spark.streaming.api.java.JavaStreamingContext;
+import org.apache.spark.streaming.kinesis.KinesisUtils;
+
+import scala.Tuple2;
+
+import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
+import com.amazonaws.services.kinesis.AmazonKinesisClient;
+import
com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionInStream;
+import com.google.common.collect.Lists;
+
+/**
+ * Java-friendly Kinesis Spark Streaming WordCount example
+ *
+ * See http://spark.apache.org/docs/latest/streaming-kinesis.html for more
details
+ * on the Kinesis Spark Streaming integration.
+ *
+ * This example spins up 1 Kinesis Worker (Spark Streaming Receiver) per
shard
+ * for the given stream.
+ * It then starts pulling from the last checkpointed sequence number of
the given
+ * <stream-name> and <endpoint-url>.
+ *
+ * Valid endpoint urls:
http://docs.aws.amazon.com/general/latest/gr/rande.html#ak_region
+ *
+ * This code uses the DefaultAWSCredentialsProviderChain and searches for
credentials
+ * in the following order of precedence:
+ * 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
+ *
+ * Usage: JavaKinesisWordCountASL <stream-name> <endpoint-url>
+ * <stream-name> is the name of the Kinesis stream (ie.
mySparkStream)
+ * <endpoint-url> is the endpoint of the Kinesis service
+ * (ie. https://kinesis.us-east-1.amazonaws.com)
+ *
+ * Example:
+ * $ export AWS_ACCESS_KEY_ID=<your-access-key>
+ * $ export AWS_SECRET_KEY=<your-secret-key>
+ * $ $SPARK_HOME/bin/run-example \
+ * org.apache.spark.examples.streaming.JavaKinesisWordCountASL
mySparkStream \
+ * https://kinesis.us-east-1.amazonaws.com
+ *
+ * There is a companion helper class called KinesisWordCountProducerASL
which puts dummy data
+ * onto the Kinesis stream.
+ * Usage instructions for KinesisWordCountProducerASL are provided in the
class definition.
+ */
+public final class JavaKinesisWordCountASL {
+ private static final Pattern WORD_SEPARATOR = Pattern.compile(" ");
+ private static final Logger logger =
Logger.getLogger(JavaKinesisWordCountASL.class);
+
+ /**
+ * Make the constructor private to enforce singleton
+ */
+ private JavaKinesisWordCountASL() {
+ }
+
+ public static void main(String[] args) {
+ /**
--- End diff --
Inline comment style should /* ... */ .... /** is reserved only for scala
docs.
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