SequencingCallbackImpl getCallbackImpl(AbstractSession writeSession, Accessor accessor) {
SequencingCallbackImpl seqCallbackImpl;
if (writeSession.hasExternalTransactionController()) {
// note that controller obtained from writeSession (not from ownerSession) -
// the difference is important in case of ownerSession being a member of SessionBroker:
// in that case only writeSession (which is either ClientSession or DatabaseSession) always
// has
// the correct controller.
seqCallbackImpl =
(SequencingCallbackImpl)
writeSession
.getExternalTransactionController()
.getActiveSequencingCallback(getOwnerSession(), getSequencingCallbackFactory());
} else {
seqCallbackImpl =
(SequencingCallbackImpl) accessor.getSequencingCallback(getSequencingCallbackFactory());
}
return seqCallbackImpl;
}
