Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/2753#discussion_r19499666
--- Diff:
core/src/main/scala/org/apache/spark/network/netty/NettyBlockRpcServer.scala ---
@@ -0,0 +1,76 @@
+/*
+ * 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.network.netty
+
+import java.nio.ByteBuffer
+
+import org.apache.spark.Logging
+import org.apache.spark.network.BlockDataManager
+import org.apache.spark.serializer.Serializer
+import org.apache.spark.network.buffer.{NioManagedBuffer, ManagedBuffer}
+import org.apache.spark.network.client.{TransportClient,
RpcResponseCallback}
+import org.apache.spark.network.server.{DefaultStreamManager, RpcHandler}
+import org.apache.spark.storage.{StorageLevel, BlockId}
+
+import scala.collection.JavaConversions._
+
+object NettyMessages {
+
+ /** Request to read a set of blocks. Returns [[ShuffleStreamHandle]] to
identify the stream. */
+ case class OpenBlocks(blockIds: Seq[BlockId])
+
+ /** Request to upload a block with a certain StorageLevel. Returns
nothing (empty byte array). */
+ case class UploadBlock(blockId: BlockId, blockData: Array[Byte], level:
StorageLevel)
+
+ /** Identifier for a fixed number of chunks to read from a stream
created by [[OpenBlocks]]. */
+ case class ShuffleStreamHandle(streamId: Long, numChunks: Int)
+}
+
+/**
+ * Serves requests to open blocks by simply registering one chunk per
block requested.
+ */
+class NettyBlockRpcServer(
+ serializer: Serializer,
+ streamManager: DefaultStreamManager,
+ blockManager: BlockDataManager)
+ extends RpcHandler with Logging {
+
+ import NettyMessages._
+
+ override def receive(
+ client: TransportClient,
+ messageBytes: Array[Byte],
+ responseContext: RpcResponseCallback): Unit = {
+ val ser = serializer.newInstance()
+ val message = ser.deserialize[AnyRef](ByteBuffer.wrap(messageBytes))
--- End diff --
ah yes. nvm. the first part still stands though :)
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