/**
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 16, 2007
*/
package com.bigdata.journal;
import java.util.UUID;
import com.bigdata.btree.IIndex;
import com.bigdata.btree.IndexMetadata;
/**
* Test suite for fully isolated read-only transactions reading from a caller
* specified start time.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class TestReadOnlyTx<S extends Journal> extends ProxyTestCase<S> {
/**
*
*/
public TestReadOnlyTx() {
}
/**
* @param name
*/
public TestReadOnlyTx(String name) {
super(name);
}
public void test_readOnly() {
final Journal journal = getStore();
try {
final String name = "abc";
final byte[] k1 = new byte[] { 1 };
final byte[] v1 = new byte[] { 1 };
final long ts1;
{
/*
* register an index, write on the index, and commit the journal.
*/
IndexMetadata md = new IndexMetadata(name, UUID.randomUUID());
md.setIsolatable(true);
journal.registerIndex(md);
IIndex ndx = journal.getIndex(name);
ndx.insert(k1, v1);
ts1 = journal.commit();
}
{
/*
* create a read-only transaction, verify that we can read the
* value written on the index but that we can not write on the
* index.
*/
final long tx1 = journal.newTx(ts1);
IIndex ndx = journal.getIndex(name, tx1);
assertNotNull(ndx);
assertEquals((byte[]) v1, (byte[]) ndx.lookup(k1));
try {
ndx.insert(k1, new byte[] { 1, 2, 3 });
fail("Expecting: " + UnsupportedOperationException.class);
} catch (UnsupportedOperationException ex) {
System.err.println("Ignoring expected exception: " + ex);
}
journal.commit(tx1);
}
{
/*
* do it again, but this time we will abort the read-only
* transaction.
*/
final long tx1 = journal.newTx(ts1);
IIndex ndx = journal.getIndex(name, tx1);
assertNotNull(ndx);
assertEquals((byte[]) v1, (byte[]) ndx.lookup(k1));
try {
ndx.insert(k1, new byte[] { 1, 2, 3 });
fail("Expecting: " + UnsupportedOperationException.class);
} catch (UnsupportedOperationException ex) {
System.err.println("Ignoring expected exception: " + ex);
}
journal.abort(tx1);
}
} finally {
journal.destroy();
}
}
}