org.apache.spark.broadcast.BroadcastFactory.scala Maven / Gradle / Ivy
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* 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
*
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package org.apache.spark.broadcast
import scala.reflect.ClassTag
import org.apache.spark.SecurityManager
import org.apache.spark.SparkConf
/**
* An interface for all the broadcast implementations in Spark (to allow
* multiple broadcast implementations). SparkContext uses a BroadcastFactory
* implementation to instantiate a particular broadcast for the entire Spark job.
*/
private[spark] trait BroadcastFactory {
def initialize(isDriver: Boolean, conf: SparkConf, securityMgr: SecurityManager): Unit
/**
* Creates a new broadcast variable.
*
* @param value value to broadcast
* @param isLocal whether we are in local mode (single JVM process)
* @param id unique id representing this broadcast variable
*/
def newBroadcast[T: ClassTag](value: T, isLocal: Boolean, id: Long): Broadcast[T]
def unbroadcast(id: Long, removeFromDriver: Boolean, blocking: Boolean): Unit
def stop(): Unit
}