Github user His-name-is-Joof commented on a diff in the pull request:
https://github.com/apache/spark/pull/6380#discussion_r31050805
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListener.scala
---
@@ -84,7 +86,10 @@ trait StreamingListener {
* @param numBatchInfos Number of last batches to consider for generating
statistics (default: 10)
*/
@DeveloperApi
-class StatsReportListener(numBatchInfos: Int = 10) extends
StreamingListener {
+class StatsReportListener(numBatchInfos: Int) extends StreamingListener {
+
+ def this() = this(10)
--- End diff --
The previous one could not be instantiated by reflection due to having no
zero-argument constructor. This provides a built-in class that can be
created at initialization without changing the functionality of the class.
On May 26, 2015 2:23 AM, "Tathagata Das" <[email protected]> wrote:
> In
>
streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListener.scala
> <https://github.com/apache/spark/pull/6380#discussion_r31012977>:
>
> > @@ -84,7 +86,10 @@ trait StreamingListener {
> > * @param numBatchInfos Number of last batches to consider for
generating statistics (default: 10)
> > */
> > @DeveloperApi
> > -class StatsReportListener(numBatchInfos: Int = 10) extends
StreamingListener {
> > +class StatsReportListener(numBatchInfos: Int) extends
StreamingListener {
> > +
> > + def this() = this(10)
>
> How is this different from previous one?
>
> â
> Reply to this email directly or view it on GitHub
> <https://github.com/apache/spark/pull/6380/files#r31012977>.
>
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