/**
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 5, 2010
*/
package com.bigdata.btree.isolation;
import java.io.IOException;
import java.util.Properties;
import java.util.UUID;
import com.bigdata.btree.AbstractBTreeTestCase;
import com.bigdata.btree.BTree;
import com.bigdata.btree.ILocalBTreeView;
import com.bigdata.btree.IndexMetadata;
import com.bigdata.journal.BufferMode;
import com.bigdata.journal.ITx;
import com.bigdata.journal.Journal;
import com.bigdata.journal.Options;
import com.bigdata.journal.ValidationError;
/**
* This is a test suite for mixing full transactions with unisolated operations
* on the same indices. These two classes of operations can be interleaved as
* long as the unisolated operations make appropriate assignment of revision
* timestamps to the tuples in the B+Tree.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class TestMixedModeOperations extends AbstractBTreeTestCase {
/**
*
*/
public TestMixedModeOperations() {
}
/**
* @param name
*/
public TestMixedModeOperations(String name) {
super(name);
}
public void test_mixedOps() throws IOException {
final Properties properties = new Properties();
properties.setProperty(Options.BUFFER_MODE, BufferMode.Transient
.toString());
final Journal journal = new Journal(properties);
final String name = "test";
try {
/*
* Register the index.
*/
{
final IndexMetadata md = new IndexMetadata(name, UUID
.randomUUID());
md.setIsolatable(true);
final BTree ndx = BTree.create(journal, md);
journal.registerIndex(name, ndx);
}
/*
* The commit time associated with the initial registration of the
* BTree.
*/
final long t0 = journal.commit();
if (log.isInfoEnabled())
log.info("t0=" + t0);
/*
* Run a transaction which writes a tuple onto the index and
* commits.
*/
// The commit time for that transaction.
final long t1;
{
// start a transaction.
final long tx1Start = journal.newTx(ITx.UNISOLATED);
if (log.isInfoEnabled())
log.info("tx1Start=" + tx1Start);
// a view of the B+Tree isolated by tx1.
final ILocalBTreeView tx1View = journal
.getIndex(name, tx1Start);
tx1View.insert(new byte[] { 2 }, new byte[] { 2 });
t1 = journal.commit(tx1Start);
if (log.isInfoEnabled())
log.info("t1=" + t1);
}
/*
* Verify that the tuple written by tx1 is now visible in the
* unisolated index and that the current revision timestamp for
* unisolated writes is GT the lastCommitTime on the journal.
*/
{
final ILocalBTreeView ndx = journal.getIndex(name,
ITx.UNISOLATED);
assertEquals(new byte[] { 2 }, ndx.lookup(new byte[] { 2 }));
final long revisionTimestamp = ((BTree) ndx)
.getRevisionTimestamp();
if (log.isInfoEnabled())
log.info("unisolated revisionTimestamp="
+ revisionTimestamp);
assertTrue(revisionTimestamp > t1);
}
/*
* Verify that an intervening unisolated write will cause a tx to
* fail validation if there is a conflict on a specific tuple.
*/
{
// start a transaction and write on a tuple.
final long tx2Start = journal.newTx(ITx.UNISOLATED);
{
if (log.isInfoEnabled())
log.info("tx2Start=" + tx2Start);
final ILocalBTreeView ndx = journal
.getIndex(name, tx2Start);
ndx.insert(new byte[] { 3 }, new byte[] { 3 });
}
// run an unisolated operation that updates the same tuple and
// commit.
final long t2;
{
final ILocalBTreeView ndx = journal.getIndex(name,
ITx.UNISOLATED);
ndx.insert(new byte[] { 3 }, new byte[] { 3 });
t2 = journal.commit();
if (log.isInfoEnabled())
log.info("t2=" + t2);
// Verify that the revision timestamp was advanced.
{
final long revisionTimestamp = ((BTree) ndx)
.getRevisionTimestamp();
if (log.isInfoEnabled())
log.info("unisolated revisionTimestamp="
+ revisionTimestamp);
assertTrue(revisionTimestamp > t2);
}
}
// attempt to commit the transaction (this should fail).
try {
journal.commit(tx2Start);
fail("Expecting: " + ValidationError.class);
} catch (ValidationError ex) {
if (log.isInfoEnabled())
log.info("Ignoring expected exception: " + ex);
}
}
} finally {
journal.destroy();
}
}
}