/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jena.tdb.store;
import java.util.ConcurrentModificationException ;
import java.util.Iterator ;
import org.apache.jena.atlas.junit.BaseTest ;
import org.apache.jena.atlas.lib.StrUtils ;
import org.apache.jena.graph.Graph ;
import org.apache.jena.graph.GraphUtil ;
import org.apache.jena.graph.Triple ;
import org.apache.jena.query.* ;
import org.apache.jena.rdf.model.Model ;
import org.apache.jena.rdf.model.RDFNode ;
import org.apache.jena.rdf.model.Resource ;
import org.apache.jena.rdf.model.Statement ;
import org.apache.jena.sparql.core.DatasetGraph ;
import org.apache.jena.sparql.core.Quad ;
import org.apache.jena.sparql.sse.Item ;
import org.apache.jena.sparql.sse.SSE ;
import org.apache.jena.sparql.sse.builders.BuilderGraph ;
import org.apache.jena.tdb.TDBFactory ;
import org.apache.jena.util.iterator.ExtendedIterator ;
import org.junit.Test ;
public class TestConcurrentAccess extends BaseTest
{
static String data = StrUtils.strjoinNL(
"(graph",
" (<x> <p> 1)" ,
" (<x> <p> 2)" ,
" (<x> <p> 3)" ,
" (<x> <p> 4)" ,
" (<x> <p> 5)" ,
" (<x> <p> 6)" ,
" (<x> <p> 7)" ,
" (<x> <p> 8)" ,
" (<x> <p> 9)" ,
")") ;
private static Graph buildGraph()
{
Item item = SSE.parse(data) ;
Graph g = BuilderGraph.buildGraph(item) ;
return g ;
}
private static Dataset create()
{
Graph g = buildGraph() ;
Dataset ds = TDBFactory.createDataset() ;
GraphUtil.addInto(ds.getDefaultModel().getGraph(), g) ;
return ds ;
}
@Test public void mrswGraph1()
{
Model m = create().getDefaultModel() ;
Resource r = m.createResource("x") ;
ExtendedIterator<Statement> iter1 = m.listStatements(r, null, (RDFNode)null) ;
assertNotNull(iter1.next()) ;
ExtendedIterator<Statement> iter2 = m.listStatements(r, null, (RDFNode)null) ;
assertNotNull(iter2.next()) ;
for ( ; iter2.hasNext() ; ) iter2.next() ;
assertNotNull(iter1.next()) ;
}
@Test(expected=ConcurrentModificationException.class)
public void mrswGraph2()
{
Model m = create().getDefaultModel() ;
Resource r = m.createResource("x") ;
ExtendedIterator<Statement> iter1 = m.listStatements(r, null, (RDFNode)null) ;
assertNotNull(iter1.next()) ;
Triple t = SSE.parseTriple("(<y> <p> 99)") ;
m.getGraph().add(t) ;
// Bad
iter1.hasNext();
}
@Test(expected=ConcurrentModificationException.class)
public void mrswGraph3()
{
Model m = create().getDefaultModel() ;
Resource r = m.createResource("x") ;
ExtendedIterator<Statement> iter1 = m.listStatements(r, null, (RDFNode)null) ;
assertNotNull(iter1.next()) ;
Triple t = SSE.parseTriple("(<y> <p> 99)") ;
m.getGraph().delete(t) ;
// Bad
iter1.hasNext();
}
@Test(expected=ConcurrentModificationException.class)
public void mrswGraph4()
{
Model m = create().getDefaultModel() ;
Resource r = m.createResource("x") ;
ExtendedIterator<Statement> iter1 = m.listLiteralStatements(r, null, 1) ;
assertNotNull(iter1.next()) ;
// and now the iterator has implicitly finished.
Triple t = SSE.parseTriple("(<y> <p> 99)") ;
m.getGraph().add(t) ;
// Bad - modification of the dataset occurred.
iter1.hasNext();
}
@Test
public void mrswGraph5()
{
Dataset d = TDBFactory.createDataset() ;
Model m = d.getNamedModel("http://example") ;
GraphUtil.addInto(m.getGraph(), buildGraph()) ;
Resource r = m.createResource("x") ;
ExtendedIterator<Statement> iter1 = m.listStatements(r, null, (RDFNode)null) ;
while(iter1.hasNext())
iter1.next();
Triple t = SSE.parseTriple("(<y> <p> 99)") ;
m.getGraph().delete(t) ;
iter1.hasNext() ;
}
@Test(expected=ConcurrentModificationException.class)
public void mrswGraph6()
{
Dataset d = TDBFactory.createDataset() ;
Model m = d.getNamedModel("http://example") ;
GraphUtil.addInto(m.getGraph(), buildGraph()) ;
Resource r = m.createResource("x") ;
ExtendedIterator<Statement> iter1 = m.listStatements(r, null, (RDFNode)null) ;
assertNotNull(iter1.next()) ;
Triple t = SSE.parseTriple("(<y> <p> 99)") ;
m.getGraph().delete(t) ;
iter1.next() ;
}
@Test
public void mrswSPARQL1()
{
Dataset ds = create();
Query query = QueryFactory.create("SELECT * { ?s ?p ?o}") ;
try(QueryExecution qExec = QueryExecutionFactory.create(query, ds)) {
ResultSet rs = qExec.execSelect() ;
while(rs.hasNext())
rs.next();
}
DatasetGraph dsg = ds.asDatasetGraph() ;
Quad quad = SSE.parseQuad("(<g> <y> <p> 99)") ;
dsg.add(quad) ;
Iterator<Quad> iter = dsg.find() ;
iter.hasNext() ;
iter.next() ;
}
@Test(expected=ConcurrentModificationException.class)
public void mrswSPARQL2()
{
Dataset ds = create();
DatasetGraph dsg = ds.asDatasetGraph() ;
Query query = QueryFactory.create("SELECT * { ?s ?p ?o}") ;
QueryExecution qExec = QueryExecutionFactory.create(query, ds) ;
ResultSet rs = qExec.execSelect() ;
rs.hasNext() ;
rs.next();
Quad quad = SSE.parseQuad("(<g> <y> <p> 99)") ;
dsg.add(quad) ;
rs.hasNext() ; // <<--- Here.
rs.next();
}
@Test(expected=ConcurrentModificationException.class)
public void mrswDataset1()
{
DatasetGraph dsg = create().asDatasetGraph() ;
Quad quad = SSE.parseQuad("(<g> <y> <p> 99)") ;
Iterator<Quad> iter = dsg.find() ;
dsg.add(quad) ;
// Bad - after an update.
iter.hasNext() ;
iter.next() ;
}
// More DSG tests ..
}