/**
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.util.concurrent;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;
import org.apache.log4j.Logger;
/**
* Helper task for monitoring the results of otherwise unwatched tasks.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @param <T>
*/
public class MonitoredFutureTask<T> extends FutureTask<T> {
private static final Logger log = Logger
.getLogger(MonitoredFutureTask.class);
public MonitoredFutureTask(final Callable<T> callable) {
super(callable);
}
public MonitoredFutureTask(final Runnable runnable, final T result) {
super(runnable, result);
}
/**
* {@inheritDoc}
* <p>
* Hooked to notice when the task is done.
*/
@Override
public void run() {
try {
super.run();
} finally {
doCheck();
}
}
private void doCheck() {
if (super.isDone()) {
try {
super.get();
} catch (InterruptedException e) {
log.warn("Interrupted: " + e);
} catch (ExecutionException e) {
log.error(e, e);
}
}
}
}