001    /**
002     * Copyright (c) 2000-present 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.membershippolicy;
016    
017    import com.liferay.portal.kernel.exception.PortalException;
018    import com.liferay.portal.kernel.log.Log;
019    import com.liferay.portal.kernel.log.LogFactoryUtil;
020    import com.liferay.portal.util.PropsValues;
021    import com.liferay.registry.Registry;
022    import com.liferay.registry.RegistryUtil;
023    import com.liferay.registry.ServiceReference;
024    import com.liferay.registry.ServiceTracker;
025    import com.liferay.registry.ServiceTrackerCustomizer;
026    
027    /**
028     * @author Sergio Gonz??lez
029     * @author Shuyang Zhou
030     * @author Peter Fellwock
031     */
032    public class UserGroupMembershipPolicyFactoryImpl
033            implements UserGroupMembershipPolicyFactory {
034    
035            @Override
036            public UserGroupMembershipPolicy getUserGroupMembershipPolicy() {
037                    return _instance._serviceTracker.getService();
038            }
039    
040            private UserGroupMembershipPolicyFactoryImpl() {
041                    Registry registry = RegistryUtil.getRegistry();
042    
043                    _serviceTracker = registry.trackServices(
044                            UserGroupMembershipPolicy.class,
045                            new UserGroupMembershipPolicyTrackerCustomizer());
046    
047                    _serviceTracker.open();
048            }
049    
050            private static final Log _log = LogFactoryUtil.getLog(
051                    UserGroupMembershipPolicyFactoryImpl.class);
052    
053            private static final UserGroupMembershipPolicyFactoryImpl
054                    _instance = new UserGroupMembershipPolicyFactoryImpl();
055    
056            private final ServiceTracker<?, UserGroupMembershipPolicy> _serviceTracker;
057    
058            private class UserGroupMembershipPolicyTrackerCustomizer
059                    implements
060                            ServiceTrackerCustomizer
061                                    <UserGroupMembershipPolicy, UserGroupMembershipPolicy> {
062    
063                    @Override
064                    public UserGroupMembershipPolicy addingService(
065                            ServiceReference<UserGroupMembershipPolicy> serviceReference) {
066    
067                            Registry registry = RegistryUtil.getRegistry();
068    
069                            UserGroupMembershipPolicy userGroupMembershipPolicy =
070                                    registry.getService(serviceReference);
071    
072                            if (PropsValues.MEMBERSHIP_POLICY_AUTO_VERIFY) {
073                                    try {
074                                            userGroupMembershipPolicy.verifyPolicy();
075                                    }
076                                    catch (PortalException pe) {
077                                            _log.error(pe, pe);
078                                    }
079                            }
080    
081                            return userGroupMembershipPolicy;
082                    }
083    
084                    @Override
085                    public void modifiedService(
086                            ServiceReference<UserGroupMembershipPolicy> serviceReference,
087                            UserGroupMembershipPolicy userGroupMembershipPolicy) {
088                    }
089    
090                    @Override
091                    public void removedService(
092                            ServiceReference<UserGroupMembershipPolicy> serviceReference,
093                            UserGroupMembershipPolicy userGroupMembershipPolicy) {
094    
095                            Registry registry = RegistryUtil.getRegistry();
096    
097                            registry.ungetService(serviceReference);
098                    }
099    
100            }
101    
102    }