Github user viper-kun commented on a diff in the pull request:
https://github.com/apache/spark/pull/5430#discussion_r28030832
--- Diff: core/src/main/scala/org/apache/spark/storage/OffHeapStore.scala
---
@@ -0,0 +1,142 @@
+/*
+ * 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.storage
+
+import java.nio.ByteBuffer
+import org.apache.spark.Logging
+import org.apache.spark.util.Utils
+
+import scala.util.control.NonFatal
+
+
+/**
+ * Stores BlockManager blocks on OffHeap.
+ * We capture any potential exception from underlying implementation
+ * and return with the expected failure value
+ */
+private[spark] class OffHeapStore(blockManager: BlockManager, executorId:
String)
+ extends BlockStore(blockManager: BlockManager) with Logging {
+
+ lazy val offHeapManager: Option[OffHeapBlockManager] =
+ OffHeapBlockManager.create(blockManager, executorId)
+
+ logInfo("OffHeap started")
+
+ override def getSize(blockId: BlockId): Long = {
+ try {
+ offHeapManager.map(_.getSize(blockId)).getOrElse(0)
+ } catch {
+ case NonFatal(t) => logError(s"error in getSize from $blockId")
+ 0
+ }
+ }
+
+ override def putBytes(blockId: BlockId, bytes: ByteBuffer, level:
StorageLevel): PutResult = {
+ putIntoOffHeapStore(blockId, bytes, returnValues = true)
+ }
+
+ override def putArray(
+ blockId: BlockId,
+ values: Array[Any],
+ level: StorageLevel,
+ returnValues: Boolean): PutResult = {
+ putIterator(blockId, values.toIterator, level, returnValues)
+ }
+
+ override def putIterator(
+ blockId: BlockId,
+ values: Iterator[Any],
+ level: StorageLevel,
+ returnValues: Boolean): PutResult = {
+ logDebug(s"Attempting to write values for block $blockId")
+ val bytes = blockManager.dataSerialize(blockId, values)
+ putIntoOffHeapStore(blockId, bytes, returnValues)
+ }
+
+ private def putIntoOffHeapStore(
+ blockId: BlockId,
+ bytes: ByteBuffer,
+ returnValues: Boolean): PutResult = {
+
+ // So that we do not modify the input offsets !
--- End diff --
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