HeartSaVioR commented on a change in pull request #26935:
URL: https://github.com/apache/spark/pull/26935#discussion_r512329977
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/StateStoreRDD.scala
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@@ -29,14 +29,51 @@ import org.apache.spark.sql.internal.SessionState
import org.apache.spark.sql.types.StructType
import org.apache.spark.util.SerializableConfiguration
+// This doesn't directly override RDD methods as MiMa complains it.
+abstract class BaseStateStoreRDD[T: ClassTag, U: ClassTag](
+ dataRDD: RDD[T],
+ checkpointLocation: String,
+ queryRunId: UUID,
+ operatorId: Long,
+ sessionState: SessionState,
+ @transient private val storeCoordinator: Option[StateStoreCoordinatorRef],
+ extraOptions: Map[String, String] = Map.empty) extends RDD[U](dataRDD) {
+
+ protected val storeConf = new StateStoreConf(sessionState.conf, extraOptions)
+
+ // A Hadoop Configuration can be about 10 KB, which is pretty big, so
broadcast it
+ protected val hadoopConfBroadcast = dataRDD.context.broadcast(
+ new SerializableConfiguration(sessionState.newHadoopConf()))
+
+ /** Implementations can simply call this method in getPreferredLocations. */
+ protected def _getPartitions: Array[Partition] = dataRDD.partitions
+
+ /**
+ * Set the preferred location of each partition using the executor that has
the related
+ * [[StateStoreProvider]] already loaded.
+ *
+ * Implementations can simply call this method in getPreferredLocations.
+ */
+ protected def _getPreferredLocations(partition: Partition): Seq[String] = {
Review comment:
same here
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