Github user haoyuan commented on a diff in the pull request:
https://github.com/apache/spark/pull/158#discussion_r11227057
--- Diff: core/src/main/scala/org/apache/spark/storage/TachyonStore.scala
---
@@ -0,0 +1,127 @@
+/*
+ * 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 scala.collection.mutable.ArrayBuffer
+
+import tachyon.client.{WriteType, ReadType}
+
+import org.apache.spark.Logging
+import org.apache.spark.util.Utils
+import org.apache.spark.serializer.Serializer
+
+
+private class Entry(val size: Long)
+
+
+/**
+ * Stores BlockManager blocks on Tachyon.
+ */
+private class TachyonStore(
+ blockManager: BlockManager,
+ tachyonManager: TachyonBlockManager)
+ extends BlockStore(blockManager: BlockManager) with Logging {
+
+ logInfo("TachyonStore started")
+
+ override def getSize(blockId: BlockId): Long = {
+ tachyonManager.getFile(blockId.name).length
+// tachyonManager.getBlockLocation(blockId).length
+ }
+
+ override def putBytes(blockId: BlockId, _bytes: ByteBuffer, level:
StorageLevel): PutResult = {
+ putToTachyonStore(blockId, _bytes, true)
+ }
+
+ override def putValues(
+ blockId: BlockId,
+ values: ArrayBuffer[Any],
+ level: StorageLevel,
+ returnValues: Boolean): PutResult = {
+ return putValues(blockId, values.toIterator, level, returnValues)
+ }
+
+ override def putValues(
+ blockId: BlockId,
+ values: Iterator[Any],
+ level: StorageLevel,
+ returnValues: Boolean): PutResult = {
+ logDebug("Attempting to write values for block " + blockId)
+ val _bytes = blockManager.dataSerialize(blockId, values)
+ putToTachyonStore(blockId, _bytes, returnValues)
+ }
+
+ private def putToTachyonStore(
+ blockId: BlockId,
+ _bytes: ByteBuffer,
+ returnValues: Boolean): PutResult = {
+ // So that we do not modify the input offsets !
+ // duplicate does not copy buffer, so inexpensive
+ val bytes = _bytes.duplicate()
+ bytes.rewind()
+ logDebug("Attempting to put block " + blockId + " into Tachyon")
+ val startTime = System.currentTimeMillis
+ val file = tachyonManager.getFile(blockId)
+ val os = file.getOutStream(WriteType.TRY_CACHE)
+ os.write(bytes.array())
+ os.close()
+ val finishTime = System.currentTimeMillis
+ logDebug("Block %s stored as %s file in Tachyon in %d ms".format(
+ blockId, Utils.bytesToString(bytes.limit), (finishTime - startTime)))
+
+ if (returnValues) {
+ PutResult(_bytes.limit(), Right(_bytes.duplicate()))
+ } else {
+ PutResult(_bytes.limit(), null)
+ }
+ }
+
+ override def remove(blockId: BlockId): Boolean = {
+ val file = tachyonManager.getFile(blockId)
+ if (tachyonManager.fileExists(file)) {
+ tachyonManager.removeFile(file)
+ } else {
+ true
+ }
+ }
+
+ override def getValues(blockId: BlockId): Option[Iterator[Any]] = {
+ getBytes(blockId).map(buffer => blockManager.dataDeserialize(blockId,
buffer))
+ }
+
+
+ override def getBytes(blockId: BlockId): Option[ByteBuffer] = {
--- End diff --
Done.
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