protected void runTest() throws Throwable {
int n = barrier.barrier();
if (n == 0) {
runCreateNode();
} else {
runFaultNode();
}
}
private void runFaultNode() throws Exception {
barrier.barrier();
final Map faultedRoot;
// fault the root under the same lock it was modified under
// this avoids a ConcurrentModificationException
synchronized (barrier) {
faultedRoot = root;
}
for (Iterator i = faultedRoot.entrySet().iterator(); i.hasNext(); ) {
Map.Entry entry = (Entry) i.next();
Object key = entry.getKey();
System.out.println(key);
Object value = entry.getValue();
System.out.println(value);
if (value instanceof Ref) {
Object ref = ((Ref) value).getRef();
System.out.println(ref);
}
}
// unblock the create node
barrier.barrier();
// wait for the create node to commit it's change
barrier.barrier();
// make sure the delta is in there
synchronized (faultedRoot) {
Object o = faultedRoot.get("delta");
Assert.assertEquals("non-null", o);
Assert.assertEquals(5, faultedRoot.size());
}
}
private void runCreateNode() throws Throwable {
final SynchronizedRef error = new SynchronizedRef(null);
// create root in this node only
root = new HashMap();
final Object newObj = new Object();
final Ref newRefToOtherNewObject = new Ref(new Object());
synchronized (root) {
root.put("delta", null);
root.put("new object", newObj);
root.put("new ref to new obj", newRefToOtherNewObject);
Runnable otherTxn =
new Runnable() {
public void run() {
try {
synchronized (barrier) {
root.put("ref to new with ref to created", new Ref(newObj));
root.put("ref to created with ref to created", newRefToOtherNewObject);
}
} catch (Throwable err) {
error.set(err);
}
}
};
Thread t1 = new Thread(otherTxn);
t1.start();
t1.join();
checkError(error);
// unblock the "fault" nodes. Need to do this in another thread so that the
// TXN the current thread is in doesn't commit()
Runnable doBarrier =
new Runnable() {
public void run() {
try {
barrier.barrier();
} catch (Throwable err) {
error.set(err);
}
}
};
Thread t2 = new Thread(doBarrier);
t2.start();
t2.join();
checkError(error);
// block at least until the other node(s) cause the problematic fault. This also needs to be
// done in another
// thread so that this thread's TXN does not commit
Thread t3 = new Thread(doBarrier);
t3.start();
t3.join();
checkError(error);
// create a change (ie. delta DNA) in the original transaction
root.put("delta", "non-null");
barrier.barrier();
}
}