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 Roberto D??az
031     * @author Peter Fellwock
032     */
033    public class RoleMembershipPolicyFactoryImpl
034            implements RoleMembershipPolicyFactory {
035    
036            @Override
037            public RoleMembershipPolicy getRoleMembershipPolicy() {
038                    return _instance._serviceTracker.getService();
039            }
040    
041            private RoleMembershipPolicyFactoryImpl() {
042                    Registry registry = RegistryUtil.getRegistry();
043    
044                    _serviceTracker = registry.trackServices(
045                            RoleMembershipPolicy.class,
046                            new RoleMembershipPolicyTrackerCustomizer());
047    
048                    _serviceTracker.open();
049            }
050    
051            private static final Log _log = LogFactoryUtil.getLog(
052                    RoleMembershipPolicyFactoryImpl.class);
053    
054            private static final RoleMembershipPolicyFactoryImpl _instance =
055                    new RoleMembershipPolicyFactoryImpl();
056    
057            private final ServiceTracker<?, RoleMembershipPolicy> _serviceTracker;
058    
059            private class RoleMembershipPolicyTrackerCustomizer
060                    implements
061                            ServiceTrackerCustomizer
062                                    <RoleMembershipPolicy, RoleMembershipPolicy> {
063    
064                    @Override
065                    public RoleMembershipPolicy addingService(
066                            ServiceReference<RoleMembershipPolicy> serviceReference) {
067    
068                            Registry registry = RegistryUtil.getRegistry();
069    
070                            RoleMembershipPolicy roleMembershipPolicy = registry.getService(
071                                    serviceReference);
072    
073                            if (PropsValues.MEMBERSHIP_POLICY_AUTO_VERIFY) {
074                                    try {
075                                            roleMembershipPolicy.verifyPolicy();
076                                    }
077                                    catch (PortalException pe) {
078                                            _log.error(pe, pe);
079                                    }
080                            }
081    
082                            return roleMembershipPolicy;
083                    }
084    
085                    @Override
086                    public void modifiedService(
087                            ServiceReference<RoleMembershipPolicy> serviceReference,
088                            RoleMembershipPolicy roleMembershipPolicy) {
089                    }
090    
091                    @Override
092                    public void removedService(
093                            ServiceReference<RoleMembershipPolicy> serviceReference,
094                            RoleMembershipPolicy roleMembershipPolicy) {
095    
096                            Registry registry = RegistryUtil.getRegistry();
097    
098                            registry.ungetService(serviceReference);
099                    }
100    
101            }
102    
103    }