spark SizeTrackingVector 源码
spark SizeTrackingVector 代码
文件路径：/core/src/main/scala/org/apache/spark/util/collection/SizeTrackingVector.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
import scala.reflect.ClassTag
/**
* An append-only buffer that keeps track of its estimated size in bytes.
*/
private[spark] class SizeTrackingVector[T: ClassTag]
extends PrimitiveVector[T]
with SizeTracker {
override def +=(value: T): Unit = {
super.+=(value)
super.afterUpdate()
}
override def resize(newLength: Int): PrimitiveVector[T] = {
super.resize(newLength)
resetSamples()
this
}
}
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