/*
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 Apr 4, 2008
*/
package com.bigdata.journal;
import java.io.IOException;
import org.apache.log4j.Logger;
/**
* Robust request for a timestamp from an {@link ITimestampService}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class TimestampServiceUtil {
protected static Logger log = Logger.getLogger(TimestampServiceUtil.class);
/**
* Utility method retries several times if there is a problem before
* throwing a {@link RuntimeException}.
*
* @param service
* The timestamp service.
*
* @return The timestamp.
*/
static public long nextTimestamp(final ITimestampService service) {
if (service == null)
throw new IllegalArgumentException();
final int maxtries = 3;
IOException cause = null;
int ntries;
for (ntries = 0; ntries < maxtries; ntries++) {
try {
return service.nextTimestamp();
} catch (IOException e) {
log.warn("Could not get timestamp: " + e, e);
cause = e;
}
}
log.error("Could not get timestamp after: " + ntries, cause);
throw new RuntimeException("Could not get timestamp after " + ntries,
cause);
}
}