The client execution unit demonstrates asynchronous processing using unique callbacks. Each asynchronous OpenAPI call is given a unique callback function, which determines the next action to be performed when the call completes. Each callback function checks the OpenAPI function call status, processes any result data, and determines the next action to be performed. Operation continues by making a new asynchronous OpenAPI function call and providing the next function in the processing sequence as the callback function. After all requested database events have been raised (including the optional server termination event), the client unit stops making asynchronous OpenAPI requests.