/*
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
*/
package com.bigdata.rdf.task;
import com.bigdata.journal.AbstractTask;
import com.bigdata.journal.IConcurrencyManager;
import com.bigdata.journal.Journal;
/**
* Wrapper for a task to be executed on the {@link IConcurrencyManager} of a
* {@link Journal}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @param <T>
* @see <a href="http://sourceforge.net/apps/trac/bigdata/ticket/753" > HA
* doLocalAbort() should interrupt NSS requests and AbstractTasks </a>
* @see <a href="- http://sourceforge.net/apps/trac/bigdata/ticket/566" >
* Concurrent unisolated operations against multiple KBs </a>
*/
public class ApiTaskForJournal<T> extends AbstractTask<T> {
private final IApiTask<T> delegate;
@Override
public String toString() {
return super.toString() + "::{delegate=" + delegate + "}";
}
public ApiTaskForJournal(final IConcurrencyManager concurrencyManager,
final long timestamp, final String[] resource,
final IApiTask<T> delegate) {
super(concurrencyManager, timestamp, resource);
this.delegate = delegate;
}
@Override
protected T doTask() throws Exception {
// Set reference to Journal on the delegate.
delegate.setIndexManager(getJournal());
try {
// Run the delegate task.
final T ret = delegate.call();
return ret;
} finally {
// Clear reference to the Journal from the delegate.
delegate.setIndexManager(null);
}
}
}