001    /**
002     * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.security.auth;
016    
017    import com.liferay.portal.kernel.concurrent.ConcurrentHashSet;
018    
019    import java.util.Set;
020    
021    /**
022     * @author Michael C. Han
023     */
024    public class DefaultAuthenticatedUserUUIDStoreImpl
025            implements AuthenticatedUserUUIDStore {
026    
027            public boolean exists(String userUUID) {
028                    return _userUUIDStore.contains(userUUID);
029            }
030    
031            public boolean register(String userUUID) {
032                    return _userUUIDStore.add(userUUID);
033            }
034    
035            public boolean unregister(String userUUID) {
036                    return _userUUIDStore.remove(userUUID);
037            }
038    
039            private Set<String> _userUUIDStore = new ConcurrentHashSet<String>();
040    
041    }