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/*
* 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.rdd
import org.apache.spark.unsafe.types.UTF8String
/**
* This holds file names of the current Spark task. This is used in HadoopRDD,
* FileScanRDD and InputFileName function in Spark SQL.
*/
private[spark] object InputFileNameHolder {
/**
* The thread variable for the name of the current file being read. This is used by
* the InputFileName function in Spark SQL.
*/
private[this] val inputFileName: ThreadLocal[UTF8String] = new ThreadLocal[UTF8String] {
override protected def initialValue(): UTF8String = UTF8String.fromString("")
}
def getInputFileName(): UTF8String = inputFileName.get()
private[spark] def setInputFileName(file: String) = inputFileName.set(UTF8String.fromString(file))
private[spark] def unsetInputFileName(): Unit = inputFileName.remove()
}
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