org.apache.spark.comet.shims.ShimCometBroadcastExchangeExec.scala Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
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package org.apache.spark.comet.shims
import scala.reflect.ClassTag
import org.apache.spark.SparkContext
import org.apache.spark.broadcast.Broadcast
trait ShimCometBroadcastExchangeExec {
// TODO: remove after dropping Spark 3.3 support
protected def doBroadcast[T: ClassTag](sparkContext: SparkContext, value: T): Broadcast[Any] = {
// Spark 3.4 has new API `broadcastInternal` to broadcast the relation without caching the
// unserialized object.
val classTag = implicitly[ClassTag[T]]
val broadcasted = sparkContext.getClass.getDeclaredMethods
.filter(_.getName == "broadcastInternal")
.map { a => a.setAccessible(true); a }
.map { method =>
method
.invoke(
sparkContext.asInstanceOf[Object],
value.asInstanceOf[Object],
true.asInstanceOf[Object],
classTag.asInstanceOf[Object])
.asInstanceOf[Broadcast[Any]]
}
.headOption
// Fallback to the old API if the new API is not available.
broadcasted
.getOrElse(sparkContext.broadcast(value.asInstanceOf[Object]))
.asInstanceOf[Broadcast[Any]]
}
}