/*
* Copyright (C) 2009 eXo Platform SAS.
*
* 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.exoplatform.services.jcr.impl.storage.value.fs.operations;
import org.exoplatform.services.jcr.datamodel.ValueData;
import org.exoplatform.services.jcr.impl.dataflow.persistent.ChangedSizeHandler;
import org.exoplatform.services.jcr.impl.storage.value.ValueDataResourceHolder;
import org.exoplatform.services.jcr.impl.util.io.FileCleaner;
import java.io.File;
import java.io.IOException;
/**
* Created by The eXo Platform SAS.
*
* <br>
* Date: 03.04.2009
*
* @author <a href="mailto:peter.nedonosko@exoplatform.com.ua">Peter Nedonosko</a>
* @version $Id: WriteValue.java 111 2008-11-11 11:11:11Z pnedonosko $
*/
public class WriteValue extends ValueFileOperation
{
/**
* Affected file.
*/
protected final File file;
/**
* Value to save.
*/
protected final ValueData value;
/**
* File lock.
*/
protected ValueFileLock fileLock;
/**
* Accumulates content size.
*/
protected final ChangedSizeHandler sizeHandler;
/**
* WriteValue constructor.
*/
public WriteValue(File file, ValueData value, ValueDataResourceHolder resources, FileCleaner cleaner, File tempDir,
ChangedSizeHandler sizeHandler)
{
super(resources, cleaner, tempDir);
this.file = file;
this.value = value;
this.sizeHandler = sizeHandler;
}
/**
* {@inheritDoc}
*/
public void execute() throws IOException
{
makePerformed();
fileLock = new ValueFileLock(file);
fileLock.lock();
}
public void prepare() throws IOException
{
if (fileLock != null)
{
// be sure the destination dir exists (case for Tree-style storage)
file.getParentFile().mkdirs();
if (file.exists())
{
// The file still exists so either it is a file that could not be removed
// or it is a multi update use case, in both cases we will need
// to prevent the file cleaner to remove it
cleaner.removeFile(file);
}
// write value to the file
long contentSize = writeValue(file, value);
sizeHandler.accumulateNewSize(contentSize);
}
}
/**
* {@inheritDoc}
*/
public void rollback() throws IOException
{
if (fileLock != null)
{
try
{
if (file.exists() && !file.delete())
{
cleaner.addFile(file);
}
}
finally
{
fileLock.unlock();
}
}
}
/**
* {@inheritDoc}
*/
public void twoPhaseCommit() throws IOException
{
if (fileLock != null)
{
fileLock.unlock();
}
}
}