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.kernel.security.membershippolicy.UserGroupMembershipPolicy;
021    import com.liferay.portal.kernel.security.membershippolicy.UserGroupMembershipPolicyFactory;
022    import com.liferay.portal.util.PropsValues;
023    import com.liferay.registry.Registry;
024    import com.liferay.registry.RegistryUtil;
025    import com.liferay.registry.ServiceReference;
026    import com.liferay.registry.ServiceTracker;
027    import com.liferay.registry.ServiceTrackerCustomizer;
028    
029    /**
030     * @author Sergio Gonz??lez
031     * @author Shuyang Zhou
032     * @author Peter Fellwock
033     */
034    public class UserGroupMembershipPolicyFactoryImpl
035            implements UserGroupMembershipPolicyFactory {
036    
037            @Override
038            public UserGroupMembershipPolicy getUserGroupMembershipPolicy() {
039                    return _instance._serviceTracker.getService();
040            }
041    
042            private UserGroupMembershipPolicyFactoryImpl() {
043                    Registry registry = RegistryUtil.getRegistry();
044    
045                    _serviceTracker = registry.trackServices(
046                            UserGroupMembershipPolicy.class,
047                            new UserGroupMembershipPolicyTrackerCustomizer());
048    
049                    _serviceTracker.open();
050            }
051    
052            private static final Log _log = LogFactoryUtil.getLog(
053                    UserGroupMembershipPolicyFactoryImpl.class);
054    
055            private static final UserGroupMembershipPolicyFactoryImpl _instance =
056                    new UserGroupMembershipPolicyFactoryImpl();
057    
058            private final ServiceTracker<?, UserGroupMembershipPolicy> _serviceTracker;
059    
060            private static class UserGroupMembershipPolicyTrackerCustomizer
061                    implements
062                            ServiceTrackerCustomizer
063                                    <UserGroupMembershipPolicy, UserGroupMembershipPolicy> {
064    
065                    @Override
066                    public UserGroupMembershipPolicy addingService(
067                            ServiceReference<UserGroupMembershipPolicy> serviceReference) {
068    
069                            Registry registry = RegistryUtil.getRegistry();
070    
071                            UserGroupMembershipPolicy userGroupMembershipPolicy =
072                                    registry.getService(serviceReference);
073    
074                            if (PropsValues.MEMBERSHIP_POLICY_AUTO_VERIFY) {
075                                    try {
076                                            userGroupMembershipPolicy.verifyPolicy();
077                                    }
078                                    catch (PortalException pe) {
079                                            _log.error(pe, pe);
080                                    }
081                            }
082    
083                            return userGroupMembershipPolicy;
084                    }
085    
086                    @Override
087                    public void modifiedService(
088                            ServiceReference<UserGroupMembershipPolicy> serviceReference,
089                            UserGroupMembershipPolicy userGroupMembershipPolicy) {
090                    }
091    
092                    @Override
093                    public void removedService(
094                            ServiceReference<UserGroupMembershipPolicy> serviceReference,
095                            UserGroupMembershipPolicy userGroupMembershipPolicy) {
096    
097                            Registry registry = RegistryUtil.getRegistry();
098    
099                            registry.ungetService(serviceReference);
100                    }
101    
102            }
103    
104    }