Github user gasparms commented on a diff in the pull request:
https://github.com/apache/spark/pull/4589#discussion_r24689870
--- Diff:
examples/src/main/java/org/apache/spark/examples/streaming/JavaStatefulNetworkWordCount.java
---
@@ -0,0 +1,116 @@
+/*
+ * 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 static java.util.Arrays.asList;
+
+import java.util.List;
+import java.util.regex.Pattern;
+
+import org.apache.spark.HashPartitioner;
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.StorageLevels;
+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.streaming.Durations;
+import org.apache.spark.streaming.api.java.JavaDStream;
+import org.apache.spark.streaming.api.java.JavaPairDStream;
+import org.apache.spark.streaming.api.java.JavaReceiverInputDStream;
+import org.apache.spark.streaming.api.java.JavaStreamingContext;
+
+import com.google.common.base.Optional;
+import com.google.common.collect.Lists;
+
+import scala.Tuple2;
+
+/**
+ * Counts words cumulatively in UTF8 encoded, '\n' delimited text received
from the network every
+ * second starting with initial value of word count.
+ * Usage: JavaStatefulNetworkWordCount <hostname> <port>
+ * <hostname> and <port> describe the TCP server that Spark Streaming
would connect to receive
+ * data.
+ * <p/>
+ * To run this on your local machine, you need to first run a Netcat server
+ * `$ nc -lk 9999`
+ * and then run the example
+ * `$ bin/run-example
+ * org.apache.spark.examples.streaming.JavaStatefulNetworkWordCount
localhost 9999`
+ */
+public class JavaStatefulNetworkWordCount {
+ private static final Pattern SPACE = Pattern.compile(" ");
--- End diff --
Thank you and changed.
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