/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.capedwarf.server.gae.io;
import java.io.IOException;
import java.nio.ByteBuffer;
import javax.enterprise.context.ApplicationScoped;
import javax.servlet.http.HttpServletResponse;
import com.google.appengine.api.blobstore.BlobKey;
import com.google.appengine.api.blobstore.BlobstoreService;
import com.google.appengine.api.blobstore.BlobstoreServiceFactory;
import com.google.appengine.api.blobstore.ByteRange;
import com.google.appengine.api.files.AppEngineFile;
import com.google.appengine.api.files.FileService;
import com.google.appengine.api.files.FileServiceFactory;
import com.google.appengine.api.files.FileWriteChannel;
import org.jboss.capedwarf.server.api.io.AbstractBlobService;
import org.jboss.capedwarf.server.api.io.Blob;
/**
* GAE blob service impl.
*
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
@ApplicationScoped
public class BlobServiceImpl extends AbstractBlobService
{
private BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
private FileService fileService = FileServiceFactory.getFileService();
protected Blob toBlobInternal(byte[] bytes)
{
return new BlobImpl(new com.google.appengine.api.datastore.Blob(bytes));
}
protected byte[] loadBytesInternal(String key, long startIndex, long endIndex)
{
BlobKey blobKey = new BlobKey(key);
return blobstoreService.fetchData(blobKey, startIndex, endIndex);
}
protected void serveBytesInternal(String key, long start, long end, HttpServletResponse response) throws IOException
{
BlobKey blobKey = new BlobKey(key);
ByteRange range = (end >= 0) ? new ByteRange(start, end) : new ByteRange(start);
blobstoreService.serve(blobKey, range, response);
}
protected String storeBytesInternal(String mimeType, byte[] bytes) throws IOException
{
AppEngineFile file = fileService.createNewBlobFile(mimeType);
FileWriteChannel writeChannel = fileService.openWriteChannel(file, true);
try
{
writeChannel.write(ByteBuffer.wrap(bytes));
}
finally
{
writeChannel.closeFinally();
}
BlobKey blobKey = fileService.getBlobKey(file);
return blobKey.getKeyString();
}
}