/*
* Copyright 2010-2011, Social Music Discovery project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Social Music Discovery project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL SOCIAL MUSIC DISCOVERY PROJECT BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.socialmusicdiscovery.server.business.logic.injections;
import com.google.inject.AbstractModule;
import com.google.inject.Provides;
import com.google.inject.Singleton;
import org.socialmusicdiscovery.server.api.mediaimport.MediaImporter;
import org.socialmusicdiscovery.server.api.mediaimport.PostProcessor;
import org.socialmusicdiscovery.server.business.logic.MediaImportManager;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.ServiceLoader;
/**
* Provides the singleton instance of the {@link MediaImportManager} which manage all media importer and post processing modules
* in the application. The media importers and post processing modules are found using {@link ServiceLoader} which looks up all registered
* implementations of the {@link MediaImporter} and {@link PostProcessor} }interfaces.
*/
public class MediaImportManagerModule extends AbstractModule {
private static MediaImportManager mediaImportManager;
@Override
protected void configure() {
}
@Provides
@Singleton
public MediaImportManager provideMediaImportManager() {
if(mediaImportManager== null) {
// Load all registered media importers registered in:
// /META-INF/services/org.socialmusicdiscovery.server.api.mediaimport.MediaImporter
Map<String, MediaImporter> mediaImporters = new HashMap<String,MediaImporter>();
ServiceLoader<MediaImporter> mediaImporterLoader = ServiceLoader.load(MediaImporter.class);
Iterator<MediaImporter> mediaImporterIterator = mediaImporterLoader.iterator();
while(mediaImporterIterator.hasNext()) {
MediaImporter importer = mediaImporterIterator.next();
mediaImporters.put(importer.getId(),importer);
}
// Load all registered post processor modules registered in:
// /META-INF/services/org.socialmusicdiscovery.server.api.mediaimport.PostProcessor
Map<String, PostProcessor> postProcessors = new HashMap<String,PostProcessor>();
ServiceLoader<PostProcessor> postProcessorLoader = ServiceLoader.load(PostProcessor.class);
Iterator<PostProcessor> postProcessorIterator = postProcessorLoader.iterator();
while(postProcessorIterator.hasNext()) {
PostProcessor postProcessor = postProcessorIterator.next();
postProcessors.put(postProcessor.getId(),postProcessor);
}
mediaImportManager = new MediaImportManager(mediaImporters, postProcessors);
}
return mediaImportManager;
}
}