/*
* JBoss, Home of Professional Open Source
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt 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;
import java.io.File;
import java.io.IOException;
import java.io.NotSerializableException;
import org.jboss.logging.Logger;
/**
* A base AttachmentsSerializer that uses a file system based store.
*
* @author Scott.Stark@jboss.org
* @author <a href="mailto:emuckenh@redhat.com">Emanuel Muckenhuber</a>
* @version $Revision: 85526 $
*/
public abstract class AbstractFileAttachmentsSerializer
{
private static final Logger log = Logger.getLogger(AbstractFileAttachmentsSerializer.class);
/** The attachment suffix */
private static final String ATTACHMENT_SUFFIX = ".attachment";
/** The deployment pre-processed attachments store dir */
private final File attachmentsStoreDir;
public AbstractFileAttachmentsSerializer(File dir)
{
if(dir == null)
throw new IllegalArgumentException("Null store dir.");
this.attachmentsStoreDir = dir;
}
public File getAttachmentsStoreDir()
{
return attachmentsStoreDir;
}
public <T> T loadAttachment(String baseName, Class<T> expected)
throws Exception
{
if( attachmentsStoreDir == null )
throw new IllegalStateException("attachmentsStoreDir has not been set");
File attachmentsStore = getAttachmentPath(baseName);
if( attachmentsStore.exists() == false )
{
return null;
}
return loadAttachment(attachmentsStore, expected);
}
public void saveAttachment(String baseName, Object attachment)
throws Exception
{
if( attachmentsStoreDir == null )
throw new IllegalStateException("attachmentsStoreDir has not been set");
File attachmentsStore = getAttachmentPath(baseName);
File attachmentsParent = attachmentsStore.getParentFile();
if( attachmentsParent.exists() == false )
{
if( attachmentsParent.mkdirs() == false )
throw new IOException("Failed to create attachmentsParent: "+attachmentsParent.getAbsolutePath());
}
if( attachment != null )
{
try
{
saveAttachment(attachmentsStore, attachment);
}
catch(NotSerializableException e)
{
// Log what is in the attachments
StringBuilder tmp = new StringBuilder("Save failed with NSE, attachments contents: ");
tmp.append(attachment).append(" to: ").append(attachmentsStore);
log.error(tmp.toString());
throw e;
}
}
}
protected File getAttachmentPath(String baseName)
{
final String vfsPath = baseName + ATTACHMENT_SUFFIX;
return new File(attachmentsStoreDir, vfsPath);
}
protected abstract <T> T loadAttachment(File attachmentsStore, Class<T> expected) throws Exception;
protected abstract void saveAttachment(File attachmentsStore, Object attachment) throws Exception;
}