Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/6252#discussion_r30663353
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/sources/SqlNewHadoopRDD.scala ---
@@ -0,0 +1,269 @@
+/*
+ * 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.sql.sources
+
+import java.text.SimpleDateFormat
+import java.util.Date
+
+import org.apache.hadoop.conf.{Configurable, Configuration}
+import org.apache.hadoop.io.Writable
+import org.apache.hadoop.mapreduce._
+import org.apache.hadoop.mapreduce.lib.input.{CombineFileSplit, FileSplit}
+import org.apache.spark.broadcast.Broadcast
+
+import org.apache.spark.{Partition => SparkPartition, _}
+import org.apache.spark.annotation.DeveloperApi
+import org.apache.spark.deploy.SparkHadoopUtil
+import org.apache.spark.executor.DataReadMethod
+import org.apache.spark.mapreduce.SparkHadoopMapReduceUtil
+import org.apache.spark.rdd.{RDD, HadoopRDD}
+import org.apache.spark.rdd.NewHadoopRDD.NewHadoopMapPartitionsWithSplitRDD
+import org.apache.spark.storage.StorageLevel
+import org.apache.spark.util.Utils
+
+import scala.reflect.ClassTag
+
+private[spark] class SqlNewHadoopPartition(
+ rddId: Int,
+ val index: Int,
+ @transient rawSplit: InputSplit with Writable)
+ extends SparkPartition {
+
+ val serializableHadoopSplit = new SerializableWritable(rawSplit)
+
+ override def hashCode(): Int = 41 * (41 + rddId) + index
+}
+
+/**
+ * :: DeveloperApi ::
+ * An RDD that provides core functionality for reading data stored in
Hadoop (e.g., files in HDFS,
+ * sources in HBase, or S3), using the new MapReduce API
(`org.apache.hadoop.mapreduce`).
+ * It is based on [[org.apache.spark.rdd.NewHadoopRDD]]. It has three
additions.
+ * 1. A shared broadcast Hadoop Configuration.
+ * 2. An optional closure `initDriverSideJobFuncOpt` that set
configurations at the driver side
+ * to the shared Hadoop Configuration.
+ * 3. An optional closure `initLocalJobFuncOpt` that set configurations at
both the driver side
+ * and the executor side to the shared Hadoop Configuration.
+ *
+ * @param sc The SparkContext to associate the RDD with.
+ * @param inputFormatClass Storage format of the data to be read.
+ * @param keyClass Class of the key associated with the inputFormatClass.
+ * @param valueClass Class of the value associated with the
inputFormatClass.
+ * @param conf The Hadoop configuration.
+ */
+@DeveloperApi
--- End diff --
Minor nit: might want to remove `@DeveloperApi` and all of the
documentation from this and just mention that it's a clone + modify of
NewHadoopRDD and that its functionality will probably be folded into core in a
future release.
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