@Before
public void setUp() throws Exception {
sail = createSail();
con = sail.getConnection();
// Create values
vf = sail.getValueFactory();
painter = vf.createURI(EXAMPLE_NS, PAINTER);
paints = vf.createURI(EXAMPLE_NS, PAINTS);
painting = vf.createURI(EXAMPLE_NS, PAINTING);
picasso = vf.createURI(EXAMPLE_NS, PICASSO);
guernica = vf.createURI(EXAMPLE_NS, GUERNICA);
rembrandt = vf.createURI(EXAMPLE_NS, REMBRANDT);
nightwatch = vf.createURI(EXAMPLE_NS, NIGHTWATCH);
context1 = vf.createURI(EXAMPLE_NS, CONTEXT_1);
context2 = vf.createURI(EXAMPLE_NS, CONTEXT_2);
}
@After
public void tearDown() throws Exception {
try {
if (con.isOpen()) {
con.rollback();
con.close();
}
} finally {
sail.shutDown();
sail = null;
}
}
@Test
public void testDualConnections() throws Exception {
SailConnection con2 = sail.getConnection();
try {
assertEquals(0, countAllElements());
con.begin();
con.addStatement(painter, RDF.TYPE, RDFS.CLASS);
con.addStatement(painting, RDF.TYPE, RDFS.CLASS);
con.addStatement(picasso, RDF.TYPE, painter, context1);
con.addStatement(guernica, RDF.TYPE, painting, context1);
con.commit();
assertEquals(4, countAllElements());
con2.begin();
con2.addStatement(RDF.NIL, RDF.TYPE, RDF.LIST);
String query = "SELECT S, P, O FROM {S} P {O}";
ParsedTupleQuery tupleQuery =
QueryParserUtil.parseTupleQuery(QueryLanguage.SERQL, query, null);
assertEquals(
5,
countElements(
con2.evaluate(
tupleQuery.getTupleExpr(), null, EmptyBindingSet.getInstance(), false)));
Runnable clearer =
new Runnable() {
public void run() {
try {
con.begin();
con.clear();
con.commit();
} catch (SailException e) {
throw new RuntimeException(e);
}
}
};
Thread thread = new Thread(clearer);
thread.start();
Thread.yield();
Thread.yield();
con2.commit();
thread.join();
} finally {
con2.close();
}
}