Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/1608#discussion_r15563085
--- Diff:
external/hbase/src/main/scala/org/apache/spark/hbase/HBaseContext.scala ---
@@ -0,0 +1,538 @@
+/*
+ * 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.hbase
+
+import org.apache.hadoop.hbase.HBaseConfiguration
+import org.apache.spark.rdd.RDD
+import java.io.ByteArrayOutputStream
+import java.io.DataOutputStream
+import java.io.ByteArrayInputStream
+import java.io.DataInputStream
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.hbase.client.HConnectionManager
+import org.apache.spark.api.java.JavaPairRDD
+import java.io.OutputStream
+import org.apache.hadoop.hbase.client.HTable
+import org.apache.hadoop.hbase.client.Scan
+import org.apache.hadoop.hbase.client.Get
+import java.util.ArrayList
+import org.apache.hadoop.hbase.client.Result
+import scala.reflect.ClassTag
+import org.apache.hadoop.hbase.client.HConnection
+import org.apache.hadoop.hbase.client.Put
+import org.apache.hadoop.hbase.client.Increment
+import org.apache.hadoop.hbase.client.Delete
+import org.apache.spark.SparkContext
+import org.apache.hadoop.hbase.mapreduce.TableInputFormat
+import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil
+import org.apache.hadoop.hbase.io.ImmutableBytesWritable
+import org.apache.hadoop.hbase.util.Bytes
+import org.apache.hadoop.mapreduce.Job
+import org.apache.hadoop.hbase.mapreduce.TableMapper
+import org.apache.hadoop.hbase.mapreduce.IdentityTableMapper
+import org.apache.hadoop.hbase.util.Base64
+import org.apache.spark.rdd.HadoopRDD
+import org.apache.spark.broadcast.Broadcast
+import org.apache.spark.SerializableWritable
+import java.util.HashMap
+import java.util.concurrent.atomic.AtomicInteger
+import org.apache.hadoop.hbase.HConstants
+import java.util.concurrent.atomic.AtomicLong
+import java.util.Timer
+import java.util.TimerTask
+import org.apache.hadoop.hbase.client.Mutation
+import scala.collection.mutable.MutableList
+import org.apache.spark.streaming.dstream.DStream
+
+/**
+ * HBaseContext is a façade of simple and complex HBase operations
+ * like bulk put, get, increment, delete, and scan
+ *
+ * HBase Context will take the responsibilities to happen to
+ * complexity of disseminating the configuration information
+ * to the working and managing the life cycle of HConnections.
+ *
+ * First constructor:
+ * @param sc Active SparkContext
+ * @param broadcastedConf This is a Broadcast object that holds a
+ * serializable Configuration object
+ *
+ */
+@serializable class HBaseContext(@transient sc: SparkContext,
+ broadcastedConf: Broadcast[SerializableWritable[Configuration]]) {
+
+ /**
+ * Second constructor option:
+ * @param sc Active SparkContext
+ * @param config Configuration object to make connection to HBase
+ */
+ def this(@transient sc: SparkContext, @transient config: Configuration) {
+ this(sc, sc.broadcast(new SerializableWritable(config)))
+ }
+
+ /**
+ * A simple enrichment of the traditional Spark RDD foreachPartition.
--- End diff --
Please take a look at other the scala docs of RDD transformation to
understand the style. For example, a better way to explain this method would be
to do the following.
`Applies a function on each partition of the given RDD using a HBase
connection`.
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