/*
* JBoss, Home of Professional Open Source.
* Copyright 2009, 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.system.server.profileservice.repository.clustered.local.file;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import org.jboss.logging.Logger;
import org.jboss.system.server.profileservice.repository.clustered.sync.ByteChunk;
import org.jboss.system.server.profileservice.repository.clustered.sync.ContentModification;
import org.jboss.system.server.profileservice.repository.clustered.sync.SynchronizationReadAction;
/**
* {@link SynchronizationReadAction} that reads from a {@link InputStream}
* and besides returning {@link ByteChunk}s, also writes the stream contents
* to a local file. Used for pushing content from a stream to both the cluster
* and the local filesystem.
*
* @author Brian Stansberry
*
* @version $Revision: $
*/
public class AddContentStreamAction extends AbstractFileWriteAction
implements SynchronizationReadAction<FileBasedSynchronizationActionContext>
{
private static final Logger log = Logger.getLogger(AddContentStreamAction.class);
/**
* Max file transfer buffer size that we read at a time.
* This influences the number of times that we will invoke disk read/write file
* operations versus how much memory we will consume for a file transfer.
*/
public static final int MAX_CHUNK_BUFFER_SIZE = 512 * 1024;
private final InputStream stream;
/**
* Create a new StreamReadAction.
*
* @param stream the stream to read
* @param context the overall context of the modification
* @param modification the modification
*/
public AddContentStreamAction(InputStream stream, File targetFile,
FileBasedSynchronizationActionContext context,
ContentModification modification)
{
super(targetFile, context, modification);
if (stream == null)
{
throw new IllegalArgumentException("Null stream");
}
this.stream = stream;
}
// ------------------------------------ RepositorySynchronizationReadAction
public ByteChunk getNextBytes() throws IOException
{
InputStream is = getInputStream();
byte[] b = null;
int read = -1;
synchronized (is)
{
b = new byte[MAX_CHUNK_BUFFER_SIZE];
read = is.read(b);
}
ByteChunk byteChunk = new ByteChunk(b, read);
// Write the bytes to our temp file as well
if (byteChunk.getByteCount() > -1)
{
writeBytes(byteChunk);
}
return byteChunk;
}
// -------------------------------------------------------------- Protected
@Override
protected Logger getLogger()
{
return log;
}
private synchronized InputStream getInputStream() throws IOException
{
State s = getState();
if (s != State.OPEN && s != State.CANCELLED)
{
throw new IllegalStateException("Cannot read when state is " + s);
}
return stream;
}
}