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.RoleMembershipPolicy;
021    import com.liferay.portal.kernel.security.membershippolicy.RoleMembershipPolicyFactory;
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 Roberto D??az
033     * @author Peter Fellwock
034     */
035    public class RoleMembershipPolicyFactoryImpl
036            implements RoleMembershipPolicyFactory {
037    
038            @Override
039            public RoleMembershipPolicy getRoleMembershipPolicy() {
040                    return _instance._serviceTracker.getService();
041            }
042    
043            private RoleMembershipPolicyFactoryImpl() {
044                    Registry registry = RegistryUtil.getRegistry();
045    
046                    _serviceTracker = registry.trackServices(
047                            RoleMembershipPolicy.class,
048                            new RoleMembershipPolicyTrackerCustomizer());
049    
050                    _serviceTracker.open();
051            }
052    
053            private static final Log _log = LogFactoryUtil.getLog(
054                    RoleMembershipPolicyFactoryImpl.class);
055    
056            private static final RoleMembershipPolicyFactoryImpl _instance =
057                    new RoleMembershipPolicyFactoryImpl();
058    
059            private final ServiceTracker<?, RoleMembershipPolicy> _serviceTracker;
060    
061            private static class RoleMembershipPolicyTrackerCustomizer
062                    implements
063                            ServiceTrackerCustomizer
064                                    <RoleMembershipPolicy, RoleMembershipPolicy> {
065    
066                    @Override
067                    public RoleMembershipPolicy addingService(
068                            ServiceReference<RoleMembershipPolicy> serviceReference) {
069    
070                            Registry registry = RegistryUtil.getRegistry();
071    
072                            RoleMembershipPolicy roleMembershipPolicy = registry.getService(
073                                    serviceReference);
074    
075                            if (PropsValues.MEMBERSHIP_POLICY_AUTO_VERIFY) {
076                                    try {
077                                            roleMembershipPolicy.verifyPolicy();
078                                    }
079                                    catch (PortalException pe) {
080                                            _log.error(pe, pe);
081                                    }
082                            }
083    
084                            return roleMembershipPolicy;
085                    }
086    
087                    @Override
088                    public void modifiedService(
089                            ServiceReference<RoleMembershipPolicy> serviceReference,
090                            RoleMembershipPolicy roleMembershipPolicy) {
091                    }
092    
093                    @Override
094                    public void removedService(
095                            ServiceReference<RoleMembershipPolicy> serviceReference,
096                            RoleMembershipPolicy roleMembershipPolicy) {
097    
098                            Registry registry = RegistryUtil.getRegistry();
099    
100                            registry.ungetService(serviceReference);
101                    }
102    
103            }
104    
105    }