[GitHub] [spark] srowen commented on a change in pull request #24241: [SPARK-27323][CORE][SQL][STREAMING] Use Single-Abstract-Method support in Scala 2.12 to simplify code

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srowen commented on a change in pull request #24241: [SPARK-27323][CORE][SQL][STREAMING] Use Single-Abstract-Method support in Scala 2.12 to simplify code
URL: https://github.com/apache/spark/pull/24241#discussion_r270521108
 
 

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 File path: core/src/main/scala/org/apache/spark/BarrierCoordinator.scala
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 @@ -202,10 +202,8 @@ private[spark] class BarrierCoordinator(
     case request @ RequestToSync(numTasks, stageId, stageAttemptId, _, _) =>
       // Get or init the ContextBarrierState correspond to the stage attempt.
       val barrierId = ContextBarrierId(stageId, stageAttemptId)
-      states.computeIfAbsent(barrierId, new Function[ContextBarrierId, ContextBarrierState] {
-        override def apply(key: ContextBarrierId): ContextBarrierState =
-          new ContextBarrierState(key, numTasks)
-      })
+      states.computeIfAbsent(barrierId,
 
 Review comment:
   90% of the changes are like this, converting an anonymous inner class to a SAM expression.

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