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 PortalCacheProvider {
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 PortalCacheProvider() {
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 PortalCacheProvider _instance =
074                    new PortalCacheProvider();
075    
076            private final
077                    Map<String, PortalCacheManager<? extends Serializable, ?>>
078                            _portalCacheManagers;
079            private final
080                    ServiceTracker<PortalCacheManager<? extends Serializable, ?>,
081                            PortalCacheManager<? extends Serializable, ?>> _serviceTracker;
082    
083            private class PortalCacheProviderServiceTrackerCustomizer
084                    implements ServiceTrackerCustomizer
085                            <PortalCacheManager<? extends Serializable, ?>,
086                                    PortalCacheManager<? extends Serializable, ?>> {
087    
088                    @Override
089                    public PortalCacheManager<? extends Serializable, ?> addingService(
090                            ServiceReference<PortalCacheManager<? extends Serializable, ?>>
091                                    serviceReference) {
092    
093                            Registry registry = RegistryUtil.getRegistry();
094    
095                            PortalCacheManager<?, ?> portalCacheManager = registry.getService(
096                                    serviceReference);
097    
098                            _portalCacheManagers.put(
099                                    portalCacheManager.getName(), portalCacheManager);
100    
101                            return portalCacheManager;
102                    }
103    
104                    @Override
105                    public void modifiedService(
106                            ServiceReference<PortalCacheManager<? extends Serializable, ?>>
107                                    serviceReference,
108                            PortalCacheManager<? extends Serializable, ?> portalCacheManager) {
109                    }
110    
111                    @Override
112                    public void removedService(
113                            ServiceReference<PortalCacheManager<? extends Serializable, ?>>
114                                    serviceReference,
115                            PortalCacheManager<? extends Serializable, ?> portalCacheManager) {
116    
117                            _portalCacheManagers.remove(portalCacheManager.getName());
118                    }
119    
120            }
121    
122    }