// create currentStateDelta for this partition
String initState = _stateModelDefs.get(message.getStateModelDef()).getInitialState();
StateModel stateModel = stateModelFactory.getStateModel(partitionKey.stringify());
if (stateModel == null) {
stateModel = stateModelFactory.createAndAddStateModel(partitionKey.stringify());
stateModel.updateState(initState);
}
// TODO: move currentStateDelta to StateTransitionMsgHandler
CurrentState currentStateDelta = new CurrentState(resourceId.stringify());
currentStateDelta.setSessionId(sessionId);