commons-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ouyang, Landon - ES/RDR -Gil" <>
Subject [SCXML] State traceability
Date Thu, 11 Dec 2008 18:50:41 GMT

I have written an application utilizing Apache Commons SCXML and JNI to add a state machine
to an application written in C++. Each state in my state machine executes a custom action
that will run a C++ routine.

I need to add traceability to my application so that a history log containing what states
and triggers were used during the traversal of the state machine can be created. The state
machine I am using is based off of AbstractStateMachine and I am using the following code
to get the current state's ID:

    public String getCurrentState()
      Set states = getEngine().getCurrentStatus().getStates();
      return ((org.apache.commons.scxml.model.State) states.iterator().

I call this Java routine from within the C++ routine executed by the custom action of that
state. The problem is this: it appears that the returning state ID of the routine is always
one state "behind" the state in which the custom action is run. It appears there is a timing

How would I fix this? Better yet, is there a different approach to this problem I should be

Landon Ouyang
Senior Design Engineer
ITT Electronics Systems, Radar Systems - Gilfillan
7821 Orion Ave,
Van Nuys, CA 91406
(818) 901-2982

This e-mail and any files transmitted with it may be proprietary and are intended solely for
the use of the individual or entity to whom they are addressed. If you have received this
e-mail in error please notify the sender.
Please note that any views or opinions presented in this e-mail are solely those of the author
and do not necessarily represent those of ITT Corporation. The recipient should check this
e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage
caused by any virus transmitted by this e-mail.

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message