/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2011. 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.rdf.sail;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Properties;
import java.util.UUID;
import org.openrdf.query.MalformedQueryException;
import org.openrdf.query.QueryEvaluationException;
import org.openrdf.query.QueryLanguage;
import org.openrdf.query.Update;
import org.openrdf.query.UpdateExecutionException;
import org.openrdf.repository.RepositoryException;
import org.openrdf.rio.RDFFormat;
import org.openrdf.rio.RDFParseException;
import com.bigdata.rdf.sail.BigdataSail.Options;
/**
* This test case covers 2 ArrayIndexOutOfBoundsException occurrences:
* 1. Overflow of values array in StatementBuffer due to blank nodes are not cleared on flush;
* 2. Overflow of values array in MergeUtility due to its capacity computed without reference to blank nodes.
*
* Test case covers both data load and insert update.
* <p>
* This test case will delegate to an underlying backing store. You can specify
* this store via a JVM property as follows:
* <code>-DtestClass=com.bigdata.rdf.sail.TestBigdataSailWithQuads</code>
*
* @see https://jira.blazegraph.com/browse/BLZG-1889
* ArrayIndexOutOfBound Exception
*/
public class TestTicket1889 extends QuadsTestCase {
public TestTicket1889() {
}
public TestTicket1889(String arg0) {
super(arg0);
}
public void testBufferCapacity() throws Exception {
final BigdataSail sail = getSail();
final BigdataSailRepository repo = new BigdataSailRepository(sail);
repo.initialize();
try {
// This configuration exceeds StatementBuffer capacity
executeQuery(repo, Integer.valueOf(BigdataSail.Options.DEFAULT_BUFFER_CAPACITY) * 5, 1);
} finally {
repo.shutDown();
sail.__tearDownUnitTest();
}
}
public void testMergeUtility() throws Exception {
final BigdataSail sail = getSail();
final BigdataSailRepository repo = new BigdataSailRepository(sail);
repo.initialize();
try {
// This configuration uses MergeUtility, ensuring its capacity is sufficient
executeQuery(repo, 35000, 7000);
} finally {
repo.shutDown();
sail.__tearDownUnitTest();
}
}
/**
* Prepares data containing blank nodes, loads it into triplestore,
* then run an update, which creates additional statements with blank nodes
* resulting number of statements loaded should be 2*n.
* Total number of blank nodes will be n+k.
* @param repo Repository to load data
* @param n Number of statements to be loaded
* @param k Number of subjects to be loaded
*/
protected void executeQuery(final BigdataSailRepository repo, final int n, final int k)
throws RepositoryException, MalformedQueryException,
QueryEvaluationException, RDFParseException, IOException, UpdateExecutionException {
final BigdataSailRepositoryConnection conn = repo.getConnection();
conn.setAutoCommit(false);
conn.clear();
try {
StringBuilder data = new StringBuilder();
for (int i = 0; i < n; i++) {
data.append("_:s").append(i%k).append(" <http://p> _:o").append(i).append(" <http://c> .\n");
}
conn.add(new ByteArrayInputStream(data.toString().getBytes()), "",
RDFFormat.NQUADS);
conn.commit();
final String query = "prefix h: <http://>\r\n" +
"\r\n" +
"INSERT { \r\n" +
" GRAPH h:c { ?s h:p1 ?o }\r\n" +
"}\r\n" +
"WHERE\r\n" +
" { GRAPH h:c {?s h:p ?o }\r\n" +
"}";
final Update q = conn.prepareUpdate(QueryLanguage.SPARQL,
query);
q.execute();
assertEquals(n * 2, conn.getTripleStore().getStatementCount(true));
} finally {
conn.close();
}
}
@Override
public Properties getProperties() {
final Properties properties = getOurDelegate().getProperties();
properties.setProperty(Options.NAMESPACE, "freshNamespace-"+UUID.randomUUID());
return properties;
}
}