| /* |
| * 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.hadoop.yarn.util; |
| |
| /** |
| * Some utilities for introspection |
| */ |
| public class Self { |
| private static boolean firstTime = true; |
| private static boolean isUnitTest = false; |
| private static boolean isJUnitTest = false; |
| |
| public synchronized static boolean isUnitTest() { |
| detect(); |
| return isUnitTest; |
| } |
| |
| public synchronized static boolean isJUnitTest() { |
| detect(); |
| return isJUnitTest; |
| } |
| |
| private synchronized static void detect() { |
| if (!firstTime) { |
| return; |
| } |
| firstTime = false; |
| for (StackTraceElement e : new Throwable().getStackTrace()) { |
| String className = e.getClassName(); |
| if (className.startsWith("org.junit")) { |
| isUnitTest = isJUnitTest = true; |
| return; |
| } |
| if (className.startsWith("org.apache.maven.surefire")) { |
| isUnitTest = true; |
| return; |
| } |
| } |
| } |
| } |