spark SizeTrackingAppendOnlyMap 源码
spark SizeTrackingAppendOnlyMap 代码
文件路径：/core/src/main/scala/org/apache/spark/util/collection/SizeTrackingAppendOnlyMap.scala
/*
* 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.util.collection
/**
* An append-only map that keeps track of its estimated size in bytes.
*/
private[spark] class SizeTrackingAppendOnlyMap[K, V]
extends AppendOnlyMap[K, V] with SizeTracker
{
override def update(key: K, value: V): Unit = {
super.update(key, value)
super.afterUpdate()
}
override def changeValue(key: K, updateFunc: (Boolean, V) => V): V = {
val newValue = super.changeValue(key, updateFunc)
super.afterUpdate()
newValue
}
override protected def growTable(): Unit = {
super.growTable()
resetSamples()
}
}
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