UltraLite User's Guide
UltraLite Reference
Synchronization parameters
Make application-specific information available to the synchronization observer class (Java) or the synchronization observer callback function (C++ API).
When implementing the synchronization observer callback function observer, you may wish to make application-specific information available. You do this by providing information using user_data.
When implementing the synchronization observer interface UlSynchObserver, you may wish to make application-specific information to the synchronization observer class. You do this by providing an object in the setUserData method.
observer synchronization parameter
Monitoring and canceling synchronization