Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/7600#discussion_r35288965
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/dstream/InputDStream.scala
---
@@ -47,6 +49,27 @@ abstract class InputDStream[T: ClassTag] (@transient
ssc_ : StreamingContext)
/** This is an unique identifier for the input stream. */
val id = ssc.getNewInputStreamId()
+ /**
+ * A rate estimator configured by the user to compute a dynamic
ingestion bound for this stream.
+ * @see `RateEstimator`
+ */
+ protected [streaming] val rateEstimator = newEstimator()
--- End diff --
Why do you need `rateEstimator` as a field in `DStream`? All you need
expose to modules outside DStream is the RateController. And the RateEstimator
can be within the `RateController`
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