/*
* 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;
import java.io.File;
import java.io.NotSerializableException;
import org.jboss.logging.Logger;
import org.jboss.system.server.profileservice.repository.clustered.metadata.RepositoryContentMetadata;
/**
* Abstract base class for a {@link ContentMetadataPersister}.
*
* @author Brian Stansberry
*/
public abstract class AbstractContentMetadataPersister
implements ContentMetadataPersister
{
private static final Logger log = Logger.getLogger(AbstractContentMetadataPersister.class);
private final File contentMetadataDir;
/**
* Create a new AbstractContentMetadataPersister.
*
* @param dir directory in which content metadata should be persisted.
* Cannot be <code>null</code>.
*/
public AbstractContentMetadataPersister(File dir)
{
if(dir == null)
throw new IllegalArgumentException("Null store dir.");
this.contentMetadataDir = dir;
}
// ------------------------------------------------ ContentMetadataPersister
public RepositoryContentMetadata load(String baseName)
{
File attachmentsStore = getMetadataPath(baseName);
if( attachmentsStore.exists() == false )
{
return null;
}
try
{
return loadMetadata(attachmentsStore);
}
catch (RuntimeException e)
{
throw e;
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
public void store(String baseName, RepositoryContentMetadata metadata)
{
File attachmentsStore = getMetadataPath(baseName);
File attachmentsParent = attachmentsStore.getParentFile();
if( attachmentsParent.exists() == false )
{
if( attachmentsParent.mkdirs() == false )
throw new RuntimeException("Failed to create attachmentsParent: "+attachmentsParent.getAbsolutePath());
}
if( metadata != null )
{
try
{
saveMetadata(attachmentsStore, metadata);
}
catch (RuntimeException e)
{
throw e;
}
catch(NotSerializableException e)
{
// Log what is in the attachments
StringBuilder tmp = new StringBuilder("Save failed with NSE, attachments contents: ");
tmp.append(metadata).append(" to: ").append(attachmentsStore);
log.error(tmp.toString());
throw new RuntimeException(e);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
}
// ------------------------------------------------------------------ Public
/**
* Get the file where metadata is stored.
*
* @param storeName the name of the store; identifies which metadata is desired
*
* @return the file. Will not be <code>null</code>
*/
public abstract File getMetadataPath(String storeName);
// -------------------------------------------------------------- Protected
/**
* Actually load the metadata
*
* @param metadataStore file where metadata is stored
*
* @return the metadata
*/
protected abstract RepositoryContentMetadata loadMetadata(File metadataStore) throws Exception;
/**
* Actually store the given metadata.
*
* @param metadataStore file where metadata should be stored. Cannot be <code>null</code>
* @param metadata the metadata. Cannot be <code>null</code>
*
* @throws Exception
*/
protected abstract void saveMetadata(File metadataStore, RepositoryContentMetadata metadata) throws Exception;
/**
* Get the base directory where content metadata is to be stored.
*
* @return the directory. Will not be <code>null</code>.
*/
protected File getContentMetadataDir()
{
return contentMetadataDir;
}
}