| /* |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * Written by Doug Lea and Martin Buchholz with assistance from |
| * members of JCP JSR-166 Expert Group and released to the public |
| * domain, as explained at |
| * http://creativecommons.org/publicdomain/zero/1.0/ |
| */ |
| |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.VarHandle; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ForkJoinPool; |
| import java.util.concurrent.ForkJoinTask; |
| import java.util.concurrent.Future; |
| |
| import junit.framework.Test; |
| import junit.framework.TestSuite; |
| |
| public class ForkJoinPool9Test extends JSR166TestCase { |
| public static void main(String[] args) { |
| main(suite(), args); |
| } |
| |
| public static Test suite() { |
| return new TestSuite(ForkJoinPool9Test.class); |
| } |
| |
| /** |
| * Check handling of common pool thread context class loader |
| */ |
| public void testCommonPoolThreadContextClassLoader() throws Throwable { |
| if (!testImplementationDetails) return; |
| |
| // Ensure common pool has at least one real thread |
| String prop = System.getProperty( |
| "java.util.concurrent.ForkJoinPool.common.parallelism"); |
| if ("0".equals(prop)) return; |
| |
| VarHandle CCL = |
| MethodHandles.privateLookupIn(Thread.class, MethodHandles.lookup()) |
| .findVarHandle(Thread.class, "contextClassLoader", ClassLoader.class); |
| ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader(); |
| boolean haveSecurityManager = (System.getSecurityManager() != null); |
| CountDownLatch taskStarted = new CountDownLatch(1); |
| Runnable runInCommonPool = () -> { |
| taskStarted.countDown(); |
| assertTrue(ForkJoinTask.inForkJoinPool()); |
| assertSame(ForkJoinPool.commonPool(), |
| ForkJoinTask.getPool()); |
| assertSame(systemClassLoader, |
| Thread.currentThread().getContextClassLoader()); |
| assertSame(systemClassLoader, |
| CCL.get(Thread.currentThread())); |
| if (haveSecurityManager) |
| assertThrows( |
| SecurityException.class, |
| () -> System.getProperty("foo"), |
| () -> Thread.currentThread().setContextClassLoader(null)); |
| // TODO ? |
| // if (haveSecurityManager |
| // && Thread.currentThread().getClass().getSimpleName() |
| // .equals("InnocuousForkJoinWorkerThread")) |
| // assertThrows(SecurityException.class, /* ?? */); |
| }; |
| Future<?> f = ForkJoinPool.commonPool().submit(runInCommonPool); |
| // Ensure runInCommonPool is truly running in the common pool, |
| // by giving this thread no opportunity to "help" on get(). |
| await(taskStarted); |
| assertNull(f.get()); |
| } |
| |
| } |