@Override
public void getWriteLock(Object resource, Transaction tx)
throws DeadlockDetectedException, IllegalResourceException {
// Code copied from getReadLock. Fix!
LockGrabber grabber = null;
if (resource instanceof Node) grabber = LockGrabber.NODE_WRITE;
else if (resource instanceof Relationship) grabber = LockGrabber.RELATIONSHIP_WRITE;
else if (resource instanceof GraphProperties) grabber = LockGrabber.GRAPH_WRITE;
else if (resource instanceof IndexLock) grabber = LockGrabber.INDEX_WRITE;
try {
if (grabber == null) {
super.getWriteLock(resource, tx);
return;
}
initializeTxIfFirst();
LockResult result = null;
do {
int eventIdentifier = getLocalTxId();
result =
databaseOperations.receive(
grabber.acquireLock(
broker.getMaster().first(),
databaseOperations.getSlaveContext(eventIdentifier),
resource));
switch (result.getStatus()) {
case OK_LOCKED:
super.getWriteLock(resource, tx);
return;
case DEAD_LOCKED:
throw new DeadlockDetectedException(result.getDeadlockMessage());
}
} while (result.getStatus() == LockStatus.NOT_LOCKED);
} catch (RuntimeException e) {
databaseOperations.exceptionHappened(e);
throw e;
}
}
private Response<LockResult> acquireLock(
RequestContext context, LockGrabber lockGrabber, Object... entities) {
Transaction otherTx = suspendOtherAndResumeThis(context, false);
try {
LockManager lockManager = graphDb.getLockManager();
TransactionState state =
((AbstractTransactionManager) graphDb.getTxManager()).getTransactionState();
for (Object entity : entities) {
lockGrabber.grab(lockManager, state, entity);
}
return packResponse(context, new LockResult(LockStatus.OK_LOCKED));
} catch (DeadlockDetectedException e) {
return packResponse(context, new LockResult(e.getMessage()));
} catch (IllegalResourceException e) {
return packResponse(context, new LockResult(LockStatus.NOT_LOCKED));
} finally {
suspendThisAndResumeOther(otherTx, context);
}
}
