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.search;
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.util.ArrayList;
024    import java.util.Collections;
025    import java.util.List;
026    import java.util.Map;
027    import java.util.concurrent.ConcurrentHashMap;
028    
029    /**
030     * @author Eudaldo Alonso
031     */
032    public class OpenSearchRegistryUtil {
033    
034            public static OpenSearch getOpenSearch(Class<?> clazz) {
035                    return _instance._openSearchInstances.get(clazz.getName());
036            }
037    
038            public static OpenSearch getOpenSearch(String className) {
039                    return _instance._openSearchInstances.get(className);
040            }
041    
042            public static List<OpenSearch> getOpenSearchInstances() {
043                    List<OpenSearch> openSearchInstances = new ArrayList<>(
044                            _instance._openSearchInstances.values());
045    
046                    return Collections.unmodifiableList(openSearchInstances);
047            }
048    
049            private OpenSearchRegistryUtil() {
050                    Registry registry = RegistryUtil.getRegistry();
051    
052                    _serviceTracker = registry.trackServices(
053                            OpenSearch.class, new OpenSearchServiceTrackerCustomizer());
054    
055                    _serviceTracker.open();
056            }
057    
058            private static final OpenSearchRegistryUtil _instance =
059                    new OpenSearchRegistryUtil();
060    
061            private final Map<String, OpenSearch> _openSearchInstances =
062                    new ConcurrentHashMap<>();
063            private final ServiceTracker<OpenSearch, OpenSearch> _serviceTracker;
064    
065            private class OpenSearchServiceTrackerCustomizer
066                    implements ServiceTrackerCustomizer<OpenSearch, OpenSearch> {
067    
068                    @Override
069                    public OpenSearch addingService(
070                            ServiceReference<OpenSearch> serviceReference) {
071    
072                            Registry registry = RegistryUtil.getRegistry();
073    
074                            OpenSearch openSearch = registry.getService(serviceReference);
075    
076                            _openSearchInstances.put(openSearch.getClassName(), openSearch);
077    
078                            return openSearch;
079                    }
080    
081                    @Override
082                    public void modifiedService(
083                            ServiceReference<OpenSearch> serviceReference,
084                            OpenSearch openSearch) {
085                    }
086    
087                    @Override
088                    public void removedService(
089                            ServiceReference<OpenSearch> serviceReference,
090                            OpenSearch openSearch) {
091    
092                            Registry registry = RegistryUtil.getRegistry();
093    
094                            registry.ungetService(serviceReference);
095    
096                            _openSearchInstances.remove(openSearch.getClassName());
097                    }
098    
099            }
100    
101    }