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.cache;
016    
017    import com.liferay.registry.Registry;
018    import com.liferay.registry.RegistryUtil;
019    import com.liferay.registry.ServiceReference;
020    import com.liferay.registry.ServiceTracker;
021    import com.liferay.registry.ServiceTrackerCustomizer;
022    
023    import java.io.Serializable;
024    
025    import java.util.Collection;
026    import java.util.Collections;
027    import java.util.Map;
028    import java.util.concurrent.ConcurrentHashMap;
029    
030    /**
031     * @author Tina Tian
032     */
033    public class PortalCacheManagerProvider {
034    
035            public static PortalCacheManager<? extends Serializable, ?>
036                    getPortalCacheManager(String portalCacheManagerName) {
037    
038                    return _instance._getPortalCacheManager(portalCacheManagerName);
039            }
040    
041            public static Collection<PortalCacheManager<? extends Serializable, ?>>
042                    getPortalCacheManagers() {
043    
044                    return _instance._getPortalCacheManagers();
045            }
046    
047            private PortalCacheManagerProvider() {
048                    _portalCacheManagers = new ConcurrentHashMap<>();
049    
050                    Registry registry = RegistryUtil.getRegistry();
051    
052                    _serviceTracker = registry.trackServices(
053                            (Class<PortalCacheManager<? extends Serializable, ?>>)(Class<?>)
054                                    PortalCacheManager.class,
055                            new PortalCacheProviderServiceTrackerCustomizer());
056    
057                    _serviceTracker.open();
058            }
059    
060            private PortalCacheManager<? extends Serializable, ?>
061                    _getPortalCacheManager(String portalCacheManagerName) {
062    
063                    return _portalCacheManagers.get(portalCacheManagerName);
064            }
065    
066            private Collection<PortalCacheManager<? extends Serializable, ?>>
067                    _getPortalCacheManagers() {
068    
069                    return Collections.unmodifiableCollection(
070                            _portalCacheManagers.values());
071            }
072    
073            private static final PortalCacheManagerProvider _instance =
074                    new PortalCacheManagerProvider();
075    
076            private final
077                    Map<String, PortalCacheManager<? extends Serializable, ?>>
078                            _portalCacheManagers;
079            private final
080                    ServiceTracker
081                            <PortalCacheManager<? extends Serializable, ?>,
082                                    PortalCacheManager<? extends Serializable, ?>> _serviceTracker;
083    
084            private class PortalCacheProviderServiceTrackerCustomizer
085                    implements ServiceTrackerCustomizer
086                            <PortalCacheManager<? extends Serializable, ?>,
087                                    PortalCacheManager<? extends Serializable, ?>> {
088    
089                    @Override
090                    public PortalCacheManager<? extends Serializable, ?> addingService(
091                            ServiceReference<PortalCacheManager<? extends Serializable, ?>>
092                                    serviceReference) {
093    
094                            Registry registry = RegistryUtil.getRegistry();
095    
096                            PortalCacheManager<?, ?> portalCacheManager = registry.getService(
097                                    serviceReference);
098    
099                            _portalCacheManagers.put(
100                                    portalCacheManager.getPortalCacheManagerName(),
101                                    portalCacheManager);
102    
103                            return portalCacheManager;
104                    }
105    
106                    @Override
107                    public void modifiedService(
108                            ServiceReference<PortalCacheManager<? extends Serializable, ?>>
109                                    serviceReference,
110                            PortalCacheManager<? extends Serializable, ?> portalCacheManager) {
111                    }
112    
113                    @Override
114                    public void removedService(
115                            ServiceReference<PortalCacheManager<? extends Serializable, ?>>
116                                    serviceReference,
117                            PortalCacheManager<? extends Serializable, ?> portalCacheManager) {
118    
119                            _portalCacheManagers.remove(
120                                    portalCacheManager.getPortalCacheManagerName());
121                    }
122    
123            }
124    
125    }