/*
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Feb 2, 2009
*/
package com.bigdata.resources;
import java.lang.ref.SoftReference;
/**
* Base class for the prepare phase which reads on the old journal.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
abstract public class AbstractPrepareTask<T> extends
AbstractResourceManagerTask<T> {
/**
* @param resourceManager
* @param timestamp
* @param resource
*/
public AbstractPrepareTask(ResourceManager resourceManager, long timestamp,
String resource) {
super(resourceManager, timestamp, resource);
}
/**
* @param resourceManager
* @param timestamp
* @param resource
*/
public AbstractPrepareTask(ResourceManager resourceManager, long timestamp,
String[] resource) {
super(resourceManager, timestamp, resource);
}
/**
* Method is responsible for clearing the {@link SoftReference}s held by
* {@link ViewMetadata} for the source view(s) on the old journal.
* <p>
* Note: This method MUST be invoked in order to permit those references to
* be cleared more eagerly than the end of the entire asynchronous overflow
* operation (which is when the task references would themselves go out of
* scope and become available for GC).
*/
abstract protected void clearRefs();
}