@Test
public void testClose() {
try {
con.close();
con.addStatement(painter, RDF.TYPE, RDFS.CLASS);
fail("Operation on connection after close should result in IllegalStateException");
} catch (IllegalStateException e) {
// do nothing, this is expected
} catch (SailException e) {
fail(e.getMessage());
}
}
@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();
}
}
/** Not compatible with our MVCC semantics. */
private void __testMultiThreadedAccess() {
Runnable runnable =
new Runnable() {
SailConnection sharedCon = con;
public void run() {
assertTrue(sharedCon != null);
try {
while (sharedCon.isActive()) {
Thread.sleep(10);
}
sharedCon.begin();
sharedCon.addStatement(painter, RDF.TYPE, RDFS.CLASS);
sharedCon.commit();
// wait a bit to allow other thread to add stuff as well.
Thread.sleep(500L);
CloseableIteration<? extends Statement, SailException> result =
sharedCon.getStatements(null, null, null, true);
assertTrue(result.hasNext());
int numberOfStatements = 0;
while (result.hasNext()) {
numberOfStatements++;
Statement st = result.next();
assertTrue(st.getSubject().equals(painter) || st.getSubject().equals(picasso));
assertTrue(st.getPredicate().equals(RDF.TYPE));
assertTrue(st.getObject().equals(RDFS.CLASS) || st.getObject().equals(painter));
}
assertTrue(
"we should have retrieved statements from both threads", numberOfStatements == 2);
} catch (SailException e) {
e.printStackTrace();
fail(e.getMessage());
} catch (InterruptedException e) {
fail(e.getMessage());
}
// let this thread sleep so the other thread can invoke close()
// first.
try {
Thread.sleep(1000L);
// the connection should now be closed (by the other thread),
// invoking any further operation should cause a
// IllegalStateException
sharedCon.getStatements(null, null, null, true);
fail("should have caused an IllegalStateException");
} catch (InterruptedException e) {
fail(e.getMessage());
} catch (SailException e) {
e.printStackTrace();
fail(e.getMessage());
} catch (IllegalStateException e) {
// do nothing, this is the expected behaviour
}
}
}; // end anonymous class declaration
// execute the other thread
Thread newThread = new Thread(runnable, "B (parallel)");
newThread.start();
try {
while (con.isActive()) {
Thread.sleep(10);
}
con.begin();
con.addStatement(picasso, RDF.TYPE, painter);
con.commit();
// let this thread sleep to enable other thread to finish its business.
Thread.sleep(1000L);
con.close();
} catch (SailException e) {
e.printStackTrace();
fail(e.getMessage());
} catch (InterruptedException e) {
fail(e.getMessage());
}
}