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.portlet.dynamicdatamapping.storage;
016    
017    import com.liferay.registry.Filter;
018    import com.liferay.registry.Registry;
019    import com.liferay.registry.RegistryUtil;
020    import com.liferay.registry.ServiceReference;
021    import com.liferay.registry.ServiceTracker;
022    import com.liferay.registry.ServiceTrackerCustomizer;
023    
024    import java.util.List;
025    import java.util.Map;
026    import java.util.Set;
027    import java.util.concurrent.ConcurrentHashMap;
028    
029    /**
030     * @author Marcellus Tavares
031     */
032    public class StorageAdapterRegistryImpl implements StorageAdapterRegistry {
033    
034            public StorageAdapterRegistryImpl() {
035                    Registry registry = RegistryUtil.getRegistry();
036    
037                    Class<?> clazz = getClass();
038    
039                    Filter filter = registry.getFilter(
040                            "(&(objectClass=" + StorageAdapter.class.getName() +
041                                    ")(!(objectClass=" + clazz.getName() + ")))");
042    
043                    _serviceTracker = registry.trackServices(
044                            filter, new StorageAdapterServiceTrackerCustomizer());
045    
046                    _serviceTracker.open();
047            }
048    
049            @Override
050            public StorageAdapter getDefaultStorageAdapter() {
051                    return _storageAdaptersMap.get(_defaultStorageType);
052            }
053    
054            @Override
055            public StorageAdapter getStorageAdapter(String storageType) {
056                    return _storageAdaptersMap.get(storageType);
057            }
058    
059            @Override
060            public Set<String> getStorageTypes() {
061                    return _storageAdaptersMap.keySet();
062            }
063    
064            public void setDefaultStorageType(String storageType) {
065                    _defaultStorageType = storageType;
066            }
067    
068            public void setStorageAdapters(List<StorageAdapter> storageAdapters) {
069                    Registry registry = RegistryUtil.getRegistry();
070    
071                    for (StorageAdapter storageAdapter : storageAdapters) {
072                            registry.registerService(StorageAdapter.class, storageAdapter);
073                    }
074            }
075    
076            private String _defaultStorageType;
077            private final ServiceTracker<StorageAdapter, StorageAdapter>
078                    _serviceTracker;
079            private final Map<String, StorageAdapter> _storageAdaptersMap =
080                    new ConcurrentHashMap<>();
081    
082            private class StorageAdapterServiceTrackerCustomizer
083                    implements ServiceTrackerCustomizer<StorageAdapter, StorageAdapter> {
084    
085                    @Override
086                    public StorageAdapter addingService(
087                            ServiceReference<StorageAdapter> serviceReference) {
088    
089                            Registry registry = RegistryUtil.getRegistry();
090    
091                            StorageAdapter storageAdapter = registry.getService(
092                                    serviceReference);
093    
094                            _storageAdaptersMap.put(
095                                    storageAdapter.getStorageType(), storageAdapter);
096    
097                            return storageAdapter;
098                    }
099    
100                    @Override
101                    public void modifiedService(
102                            ServiceReference<StorageAdapter> serviceReference,
103                            StorageAdapter storageAdapter) {
104                    }
105    
106                    @Override
107                    public void removedService(
108                            ServiceReference<StorageAdapter> serviceReference,
109                            StorageAdapter storageAdapter) {
110    
111                            Registry registry = RegistryUtil.getRegistry();
112    
113                            registry.ungetService(serviceReference);
114                    }
115    
116            }
117    
118    }