Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/4875#discussion_r25981054
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/dstream/DStream.scala ---
@@ -649,7 +649,23 @@ abstract class DStream[T: ClassTag] (
* DStream's batching interval
*/
def window(windowDuration: Duration, slideDuration: Duration):
DStream[T] = {
- new WindowedDStream(this, windowDuration, slideDuration)
+ new WindowedDStream(this, windowDuration, slideDuration, None)
+ }
+
+ /**
+ * Return a new DStream in which each RDD contains all the elements in
seen in a
+ * sliding window of time over this DStream.
+ * @param windowDuration width of the window; must be a multiple of this
DStream's
+ * batching interval
+ * @param slideDuration sliding interval of the window (i.e., the
interval after which
+ * the new DStream will generate RDDs); must be a
multiple of this
+ * DStream's batching interval
+ * @param initialWindow initial window values to prepend starting with
the oldest entry
+ */
+ def window(windowDuration: Duration,
+ slideDuration: Duration,
+ initialWindow: Option[Seq[RDD[T]]]): DStream[T] = {
--- End diff --
Same question, why option.
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