@Test
public void concurrentTest() throws Exception {
final Random rand = new Random();
final AtomicInteger gen = new AtomicInteger();
final ConcurrentTestCase testCase = new ConcurrentTestCase(100, 1000, new ConcurrentTestTask() {
@Override
public void run(final int index, final int times) throws Exception {
final int id = gen.incrementAndGet();
final LocalTransactionId xid = new LocalTransactionId("test", id);