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.exportimport.controller;
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    import com.liferay.registry.collections.ServiceRegistrationMapImpl;
028    import com.liferay.registry.util.StringPlus;
029    
030    import java.util.Collection;
031    import java.util.List;
032    import java.util.Map;
033    import java.util.concurrent.ConcurrentHashMap;
034    
035    /**
036     * @author Daniel Kocsis
037     */
038    @ProviderType
039    public class ExportImportControllerRegistryUtil {
040    
041            public static ExportController getExportController(String className) {
042                    return _instance._getExportController(className);
043            }
044    
045            public static List<ExportImportController> getExportImportControllers() {
046                    return _instance._getExportImportControllers();
047            }
048    
049            public static ImportController getImportController(String className) {
050                    return _instance._getImportController(className);
051            }
052    
053            public static void register(ExportImportController exportImportController) {
054                    _instance._register(exportImportController);
055            }
056    
057            public static void unregister(
058                    ExportImportController exportImportController) {
059    
060                    _instance._unregister(exportImportController);
061            }
062    
063            private ExportImportControllerRegistryUtil() {
064                    Registry registry = RegistryUtil.getRegistry();
065    
066                    _serviceTracker = registry.trackServices(
067                            ExportImportController.class,
068                            new ExportImportControllerServiceTrackerCustomizer());
069    
070                    _serviceTracker.open();
071            }
072    
073            private ExportController _getExportController(String className) {
074                    return _exportControllers.get(className);
075            }
076    
077            private List<ExportImportController> _getExportImportControllers() {
078                    Collection<ExportImportController> values =
079                            _exportImportControllers.values();
080    
081                    return ListUtil.fromCollection(values);
082            }
083    
084            private ImportController _getImportController(String className) {
085                    return _importControllers.get(className);
086            }
087    
088            private void _register(ExportImportController exportImportController) {
089                    Registry registry = RegistryUtil.getRegistry();
090    
091                    ServiceRegistration<ExportImportController> serviceRegistration =
092                            registry.registerService(
093                                    ExportImportController.class, exportImportController);
094    
095                    _serviceRegistrations.put(exportImportController, serviceRegistration);
096            }
097    
098            private void _unregister(ExportImportController exportImportController) {
099                    ServiceRegistration<ExportImportController> serviceRegistration =
100                            _serviceRegistrations.remove(exportImportController);
101    
102                    if (serviceRegistration != null) {
103                            serviceRegistration.unregister();
104                    }
105            }
106    
107            private static final ExportImportControllerRegistryUtil _instance =
108                    new ExportImportControllerRegistryUtil();
109    
110            private final Map<String, ExportController> _exportControllers =
111                    new ConcurrentHashMap<>();
112            private final Map<String, ExportImportController> _exportImportControllers =
113                    new ConcurrentHashMap<>();
114            private final Map<String, ImportController> _importControllers =
115                    new ConcurrentHashMap<>();
116            private final ServiceRegistrationMap<ExportImportController>
117                    _serviceRegistrations = new ServiceRegistrationMapImpl<>();
118            private final ServiceTracker<ExportImportController, ExportImportController>
119                    _serviceTracker;
120    
121            private class ExportImportControllerServiceTrackerCustomizer
122                    implements ServiceTrackerCustomizer
123                            <ExportImportController, ExportImportController> {
124    
125                    @Override
126                    public ExportImportController addingService(
127                            ServiceReference<ExportImportController> serviceReference) {
128    
129                            Registry registry = RegistryUtil.getRegistry();
130    
131                            ExportImportController exportImportController = registry.getService(
132                                    serviceReference);
133    
134                            List<String> modelClassNames = StringPlus.asList(
135                                    serviceReference.getProperty("model.class.name"));
136    
137                            for (String modelClassName : modelClassNames) {
138                                    if (exportImportController instanceof ExportController) {
139                                            _exportControllers.put(
140                                                    modelClassName,
141                                                    (ExportController)exportImportController);
142                                    }
143                                    else if (exportImportController instanceof ImportController) {
144                                            _importControllers.put(
145                                                    modelClassName,
146                                                    (ImportController)exportImportController);
147                                    }
148    
149                                    _exportImportControllers.put(
150                                            modelClassName, exportImportController);
151                            }
152    
153                            return exportImportController;
154                    }
155    
156                    @Override
157                    public void modifiedService(
158                            ServiceReference<ExportImportController> serviceReference,
159                            ExportImportController stagedModelDataHandler) {
160                    }
161    
162                    @Override
163                    public void removedService(
164                            ServiceReference<ExportImportController> serviceReference,
165                            ExportImportController exportImportController) {
166    
167                            Registry registry = RegistryUtil.getRegistry();
168    
169                            registry.ungetService(serviceReference);
170    
171                            List<String> modelClassNames = StringPlus.asList(
172                                    serviceReference.getProperty("model.class.name"));
173    
174                            for (String modelClassName : modelClassNames) {
175                                    if (exportImportController instanceof ExportController) {
176                                            _exportControllers.remove(modelClassName);
177                                    }
178                                    else if (exportImportController instanceof ImportController) {
179                                            _importControllers.remove(modelClassName);
180                                    }
181    
182                                    _exportImportControllers.remove(modelClassName);
183                            }
184                    }
185    
186            }
187    
188    }