| /* |
| * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved. |
| * 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| package com.sun.xml.internal.ws.api.pipe; |
| |
| import java.lang.reflect.Constructor; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.concurrent.ThreadFactory; |
| |
| /** |
| * Simple utility class to instantiate correct Thread instance |
| * depending on Java version. |
| * |
| * @author miroslav.kos@oracle.com |
| */ |
| final class ThreadHelper { |
| |
| private static final String SAFE_THREAD_NAME = "sun.misc.ManagedLocalsThread"; |
| |
| private static final ThreadFactory threadFactory; |
| |
| // no instantiating wanted |
| private ThreadHelper() { |
| } |
| |
| static { |
| threadFactory = AccessController.doPrivileged( |
| new PrivilegedAction<ThreadFactory> () { |
| @Override |
| public ThreadFactory run() { |
| // In order of preference |
| try { |
| try { |
| Class<Thread> cls = Thread.class; |
| Constructor<Thread> ctr = cls.getConstructor( |
| ThreadGroup.class, |
| Runnable.class, |
| String.class, |
| long.class, |
| boolean.class); |
| return new JDK9ThreadFactory(ctr); |
| } catch (NoSuchMethodException ignored) { |
| // constructor newly added in Java SE 9 |
| } |
| Class<?> cls = Class.forName(SAFE_THREAD_NAME); |
| Constructor<?> ctr = cls.getConstructor(Runnable.class); |
| return new SunMiscThreadFactory(ctr); |
| } catch (ClassNotFoundException | NoSuchMethodException ignored) {} |
| return new LegacyThreadFactory(); |
| } |
| } |
| ); |
| } |
| |
| static Thread createNewThread(final Runnable r) { |
| return threadFactory.newThread(r); |
| } |
| |
| // A Thread factory backed by the Thread constructor that |
| // suppresses inheriting of inheritable thread-locals. |
| private static class JDK9ThreadFactory implements ThreadFactory { |
| final Constructor<Thread> ctr; |
| JDK9ThreadFactory(Constructor<Thread> ctr) { this.ctr = ctr; } |
| @Override public Thread newThread(Runnable r) { |
| try { |
| return ctr.newInstance(null, r, "toBeReplaced", 0, false); |
| } catch (ReflectiveOperationException x) { |
| InternalError ie = new InternalError(x.getMessage()); |
| ie.initCause(ie); |
| throw ie; |
| } |
| } |
| } |
| |
| // A Thread factory backed by sun.misc.ManagedLocalsThread |
| private static class SunMiscThreadFactory implements ThreadFactory { |
| final Constructor<?> ctr; |
| SunMiscThreadFactory(Constructor<?> ctr) { this.ctr = ctr; } |
| @Override public Thread newThread(final Runnable r) { |
| return AccessController.doPrivileged( |
| new PrivilegedAction<Thread>() { |
| @Override |
| public Thread run() { |
| try { |
| return (Thread) ctr.newInstance(r); |
| } catch (Exception e) { |
| return new Thread(r); |
| } |
| } |
| } |
| ); |
| } |
| } |
| |
| // A Thread factory backed by new Thread(Runnable) |
| private static class LegacyThreadFactory implements ThreadFactory { |
| @Override public Thread newThread(Runnable r) { |
| return new Thread(r); |
| } |
| } |
| } |