001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
013     */
014    
015    package com.liferay.portal.kernel.util;
016    
017    import java.util.HashSet;
018    import java.util.Set;
019    
020    /**
021     * @author Shuyang Zhou
022     */
023    public class ThreadLocalRegistry {
024    
025            public static ThreadLocal<?>[] captureSnapshot() {
026                    Set<ThreadLocal<?>> threadLocalSet = _threadLocalSet.get();
027    
028                    return threadLocalSet.toArray(
029                            new ThreadLocal<?>[threadLocalSet.size()]);
030            }
031    
032            public static void registerThreadLocal(ThreadLocal<?> threadLocal) {
033                    Set<ThreadLocal<?>> threadLocalSet = _threadLocalSet.get();
034    
035                    threadLocalSet.add(threadLocal);
036            }
037    
038            public static void resetThreadLocals() {
039                    Set<ThreadLocal<?>> threadLocalSet = _threadLocalSet.get();
040    
041                    if (threadLocalSet == null) {
042                            return;
043                    }
044    
045                    for (ThreadLocal<?> threadLocal : threadLocalSet) {
046                            threadLocal.remove();
047                    }
048            }
049    
050            private static ThreadLocal<Set<ThreadLocal<?>>> _threadLocalSet =
051                    new InitialThreadLocal<Set<ThreadLocal<?>>>(
052                            ThreadLocalRegistry.class + "._threadLocalSet",
053                            new HashSet<ThreadLocal<?>>());
054    
055    }