org.apache.spark.broadcast.TorrentBroadcastFactory.scala Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.broadcast
import scala.reflect.ClassTag
import org.apache.spark.{SecurityManager, SparkConf}
/**
* A [[org.apache.spark.broadcast.Broadcast]] implementation that uses a BitTorrent-like
* protocol to do a distributed transfer of the broadcasted data to the executors. Refer to
* [[org.apache.spark.broadcast.TorrentBroadcast]] for more details.
*/
private[spark] class TorrentBroadcastFactory extends BroadcastFactory {
override def initialize(isDriver: Boolean, conf: SparkConf, securityMgr: SecurityManager) { }
override def newBroadcast[T: ClassTag](value_ : T, isLocal: Boolean, id: Long): Broadcast[T] = {
new TorrentBroadcast[T](value_, id)
}
override def stop() { }
/**
* Remove all persisted state associated with the torrent broadcast with the given ID.
* @param removeFromDriver Whether to remove state from the driver.
* @param blocking Whether to block until unbroadcasted
*/
override def unbroadcast(id: Long, removeFromDriver: Boolean, blocking: Boolean) {
TorrentBroadcast.unpersist(id, removeFromDriver, blocking)
}
}