/**
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 Mar 16, 2012
*/
package com.bigdata.bop.rdf.update;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;
import com.bigdata.bop.BOp;
import com.bigdata.bop.BOpContext;
import com.bigdata.bop.IBindingSet;
import com.bigdata.bop.ITimestampAnnotations;
import com.bigdata.bop.PipelineOp;
import com.bigdata.journal.Journal;
import com.bigdata.journal.TimestampUtility;
/**
* Commit the operation. If the operation is isolated by a transaction, then the
* transaction is committed. Otherwise an unisolated commit is performed.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public final class CommitOp extends PipelineOp {
public interface Annotations extends PipelineOp.Annotations,
ITimestampAnnotations {
}
public CommitOp(final BOp[] args, final Map<String, Object> annotations) {
super(args, annotations);
getRequiredProperty(Annotations.TIMESTAMP);
if (getProperty(Annotations.PIPELINED, Annotations.DEFAULT_PIPELINED)) {
/*
* Pipelined evaluation is not permitted for COMMIT. You need to
* know that everything upstream was successfully evaluated before
* you can invoke commit(). "At once" evaluation semantics given us
* that guarantee.
*/
throw new IllegalArgumentException(Annotations.PIPELINED);
}
}
public CommitOp(final CommitOp op) {
super(op);
}
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public FutureTask<Void> eval(final BOpContext<IBindingSet> context) {
return new FutureTask<Void>(new ChunkTask(context, this));
}
static private class ChunkTask implements Callable<Void> {
private final long timestamp;
private final Journal store;
public ChunkTask(final BOpContext<IBindingSet> context,
final CommitOp op) {
timestamp = (Long) op.getRequiredProperty(Annotations.TIMESTAMP);
if (TimestampUtility.isReadOnly(timestamp)) {
/*
* Must be read-write tx or unisolated operation.
*/
throw new UnsupportedOperationException();
}
/*
* TODO Could allow on a temporary store also, but it is a NOP there
* and does not need to be in the query plan.
*/
store = (Journal) context.getIndexManager();
}
@Override
public Void call() throws Exception {
final long commitTime;
if (TimestampUtility.isUnisolated(timestamp)) {
/*
* Unisolated commit.
*/
commitTime = store.commit();
} else {
/*
* Commit transaction.
*/
commitTime = store.commit(timestamp);
}
/*
* TODO Pass back the commit time and/or #of commits via mutation
* stats.
*/
// done.
return null;
}
} // ChunkTask
} // CommitOp