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Diffstat (limited to 'core/src/main/scala/org/apache/spark/rdd/InputFileNameHolder.scala')
-rw-r--r-- | core/src/main/scala/org/apache/spark/rdd/InputFileNameHolder.scala | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/core/src/main/scala/org/apache/spark/rdd/InputFileNameHolder.scala b/core/src/main/scala/org/apache/spark/rdd/InputFileNameHolder.scala new file mode 100644 index 0000000000..108e9d2558 --- /dev/null +++ b/core/src/main/scala/org/apache/spark/rdd/InputFileNameHolder.scala @@ -0,0 +1,41 @@ +/* + * 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() + +} |