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.kernel.portlet;
016    
017    import aQute.bnd.annotation.ProviderType;
018    
019    import com.liferay.portal.kernel.util.ListUtil;
020    import com.liferay.registry.Registry;
021    import com.liferay.registry.RegistryUtil;
022    import com.liferay.registry.ServiceReference;
023    import com.liferay.registry.ServiceRegistration;
024    import com.liferay.registry.ServiceTracker;
025    import com.liferay.registry.ServiceTrackerCustomizer;
026    import com.liferay.registry.collections.ServiceRegistrationMap;
027    
028    import java.util.List;
029    import java.util.Map;
030    import java.util.Set;
031    import java.util.concurrent.ConcurrentHashMap;
032    
033    /**
034     * @author Eduardo Garcia
035     */
036    @ProviderType
037    public class FriendlyURLResolverRegistryUtil {
038    
039            public static FriendlyURLResolver getFriendlyURLResolver(
040                    String urlSeparator) {
041    
042                    return _instance._getFriendlyURLResolver(urlSeparator);
043            }
044    
045            public static List<FriendlyURLResolver> getFriendlyURLResolvers() {
046                    return _instance._getFriendlyURLResolvers();
047            }
048    
049            public static String[] getURLSeparators() {
050                    return _instance._getURLSeparators();
051            }
052    
053            public static void register(FriendlyURLResolver friendlyURLResolver) {
054                    _instance._register(friendlyURLResolver);
055            }
056    
057            public static void unregister(FriendlyURLResolver friendlyURLResolver) {
058                    _instance._unregister(friendlyURLResolver);
059            }
060    
061            private FriendlyURLResolverRegistryUtil() {
062                    Registry registry = RegistryUtil.getRegistry();
063    
064                    _serviceTracker = registry.trackServices(
065                            FriendlyURLResolver.class,
066                            new FriendlyURLResolverServiceTrackerCustomizer());
067    
068                    _serviceTracker.open();
069            }
070    
071            private FriendlyURLResolver _getFriendlyURLResolver(String urlSeparator) {
072                    return _friendlyURLResolvers.get(urlSeparator);
073            }
074    
075            private List<FriendlyURLResolver> _getFriendlyURLResolvers() {
076                    return ListUtil.fromMapValues(_friendlyURLResolvers);
077            }
078    
079            private String[] _getURLSeparators() {
080                    Set<String> urlSeparators = _friendlyURLResolvers.keySet();
081    
082                    return urlSeparators.toArray(new String[urlSeparators.size()]);
083            }
084    
085            private void _register(FriendlyURLResolver friendlyURLResolver) {
086                    Registry registry = RegistryUtil.getRegistry();
087    
088                    ServiceRegistration<FriendlyURLResolver> serviceRegistration =
089                            registry.registerService(
090                                    FriendlyURLResolver.class, friendlyURLResolver);
091    
092                    _serviceRegistrations.put(friendlyURLResolver, serviceRegistration);
093            }
094    
095            private void _unregister(FriendlyURLResolver friendlyURLResolver) {
096                    ServiceRegistration<FriendlyURLResolver> serviceRegistration =
097                            _serviceRegistrations.remove(friendlyURLResolver);
098    
099                    if (serviceRegistration != null) {
100                            serviceRegistration.unregister();
101                    }
102            }
103    
104            private static final FriendlyURLResolverRegistryUtil _instance =
105                    new FriendlyURLResolverRegistryUtil();
106    
107            private final Map<String, FriendlyURLResolver> _friendlyURLResolvers =
108                    new ConcurrentHashMap<>();
109            private final ServiceRegistrationMap<FriendlyURLResolver>
110                    _serviceRegistrations = new ServiceRegistrationMap<>();
111            private final ServiceTracker<FriendlyURLResolver, FriendlyURLResolver>
112                    _serviceTracker;
113    
114            private class FriendlyURLResolverServiceTrackerCustomizer
115                    implements ServiceTrackerCustomizer<FriendlyURLResolver,
116                            FriendlyURLResolver> {
117    
118                    @Override
119                    public FriendlyURLResolver addingService(
120                            ServiceReference<FriendlyURLResolver> serviceReference) {
121    
122                            Registry registry = RegistryUtil.getRegistry();
123    
124                            FriendlyURLResolver friendlyURLResolver = registry.getService(
125                                    serviceReference);
126    
127                            _friendlyURLResolvers.put(
128                                    friendlyURLResolver.getURLSeparator(), friendlyURLResolver);
129    
130                            return friendlyURLResolver;
131                    }
132    
133                    @Override
134                    public void modifiedService(
135                            ServiceReference<FriendlyURLResolver> serviceReference,
136                            FriendlyURLResolver friendlyURLResolver) {
137                    }
138    
139                    @Override
140                    public void removedService(
141                            ServiceReference<FriendlyURLResolver> serviceReference,
142                            FriendlyURLResolver friendlyURLResolver) {
143    
144                            Registry registry = RegistryUtil.getRegistry();
145    
146                            registry.ungetService(serviceReference);
147    
148                            _friendlyURLResolvers.remove(friendlyURLResolver.getURLSeparator());
149                    }
150    
151            }
152    
153    }