1/* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18package org.apache.spark.util 19 20/** 21 * Extractor Object for pulling out the root cause of an error. 22 * If the error contains no cause, it will return the error itself. 23 * 24 * Usage: 25 * try { 26 * ... 27 * } catch { 28 * case CausedBy(ex: CommitDeniedException) => ... 29 * } 30 */ 31private[spark] object CausedBy { 32 33 def unapply(e: Throwable): Option[Throwable] = { 34 Option(e.getCause).flatMap(cause => unapply(cause)).orElse(Some(e)) 35 } 36} 37