Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/17295#discussion_r107789203
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -56,6 +57,44 @@ private[spark] class BlockResult(
val bytes: Long)
/**
+ * Abstracts away how blocks are stored and provides different ways to
read the underlying block
+ * data. Callers should call [[dispose()]] when they're done with the
block.
+ */
+private[spark] trait BlockData {
+
+ def toInputStream(): InputStream
+
+ def toNetty(): Object
+
+ def toChunkedByteBuffer(allocator: Int => ByteBuffer): ChunkedByteBuffer
+
+ def toByteBuffer(): ByteBuffer
--- End diff --
I added scaladoc for `toNetty()`, but the others seem self-explanatory to
me.
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