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Posted to user@commons.apache.org by Ingmar Kliche <in...@googlemail.com> on 2007/07/09 13:28:23 UTC
Re: [SCXML] Inject external event with XML payload () into SCXML engine
(Move this thread to the user list)
Rahul,
you wrote:
> You can define expression language functions to do more specialized
things.
That sounds interesting. Do you have an advice where to find examples on how
to define EL functions and how to use them in an SCXML document?
Thanks,
Ingmar.
2007/7/6, Rahul Akolkar <ra...@gmail.com>:
>
> Please post to the user list if the question is purely about usage
> (though I understand determining that can be tricky sometimes). If
> this thread continues, we should probably move it to the user list.
>
> On 7/5/07, Ingmar Kliche <in...@googlemail.com> wrote:
> > Rahul,
> >
> > I would like to inject events with XML payload into the SCXML engine.
> > Currently we have to convert XML represented messages received from
> external
> > components into a hashmap object to fire the event into the engine. But
> this
> > does not allow to include XML attributes easily. Suppose we have an
> event
> > which is represented as an EMMA string, e.g. (borrowed from [1])
> >
> > <emma:emma version="1.0">
> > <emma:one-of id="r1" emma:start="1087995961542"
> emma:end="1087995963542">
> > <emma:interpretation id="int1" emma:confidence="0.75"
> > emma:tokens="flights from boston to denver">
> > <origin>Boston</origin>
> > <destination>Denver</destination>
> > </emma:interpretation>
> >
> > <emma:interpretation id="int2" emma:confidence="0.68"
> > emma:tokens="flights from austin to denver">
> > <origin>Austin</origin>
> > <destination>Denver</destination>
> > </emma:interpretation>
> > </emma:one-of>
> > </emma:emma>
> >
> > How do we pass this into the SCXML engine? My goal is to pass this XML
> data
> > into the SCXML data model and operate on the event data using XPath.
> >
> > Do you have any suggestion?
> >
> <snip/>
>
> Might be best to parse the EMMA into its DOM before attaching it to
> the payload (say under property 'emma').
>
> Then you can get to it like so:
>
> Data( _eventdata.emma , '/some/xpath' )
>
> You can define expression language functions to do more specialized
> things.
>
> You can use <assign> to store the payload in the SCXML data model.
>
> -Rahul
>
>
> > - Ingmar.
> >
> > [1] http://www.w3.org/TR/emma
> >
>
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Re: [SCXML] Inject external event with XML payload () into SCXML engine
Posted by Rahul Akolkar <ra...@gmail.com>.
On 7/9/07, Ingmar Kliche <in...@googlemail.com> wrote:
> (Move this thread to the user list)
>
<snip/>
Thanks!
> Rahul,
>
> you wrote:
>
> > You can define expression language functions to do more specialized
> things.
>
> That sounds interesting. Do you have an advice where to find examples on how
> to define EL functions and how to use them in an SCXML document?
>
<snap/>
See bottom of the user guide page on Contexts and Evaluators [1] for a
short description.
-Rahul
[1] http://jakarta.apache.org/commons/scxml/guide/contexts-evaluators.html
> Thanks,
> Ingmar.
>
>
> 2007/7/6, Rahul Akolkar <ra...@gmail.com>:
> >
> > Please post to the user list if the question is purely about usage
> > (though I understand determining that can be tricky sometimes). If
> > this thread continues, we should probably move it to the user list.
> >
> > On 7/5/07, Ingmar Kliche <in...@googlemail.com> wrote:
> > > Rahul,
> > >
> > > I would like to inject events with XML payload into the SCXML engine.
> > > Currently we have to convert XML represented messages received from
> > external
> > > components into a hashmap object to fire the event into the engine. But
> > this
> > > does not allow to include XML attributes easily. Suppose we have an
> > event
> > > which is represented as an EMMA string, e.g. (borrowed from [1])
> > >
> > > <emma:emma version="1.0">
> > > <emma:one-of id="r1" emma:start="1087995961542"
> > emma:end="1087995963542">
> > > <emma:interpretation id="int1" emma:confidence="0.75"
> > > emma:tokens="flights from boston to denver">
> > > <origin>Boston</origin>
> > > <destination>Denver</destination>
> > > </emma:interpretation>
> > >
> > > <emma:interpretation id="int2" emma:confidence="0.68"
> > > emma:tokens="flights from austin to denver">
> > > <origin>Austin</origin>
> > > <destination>Denver</destination>
> > > </emma:interpretation>
> > > </emma:one-of>
> > > </emma:emma>
> > >
> > > How do we pass this into the SCXML engine? My goal is to pass this XML
> > data
> > > into the SCXML data model and operate on the event data using XPath.
> > >
> > > Do you have any suggestion?
> > >
> > <snip/>
> >
> > Might be best to parse the EMMA into its DOM before attaching it to
> > the payload (say under property 'emma').
> >
> > Then you can get to it like so:
> >
> > Data( _eventdata.emma , '/some/xpath' )
> >
> > You can define expression language functions to do more specialized
> > things.
> >
> > You can use <assign> to store the payload in the SCXML data model.
> >
> > -Rahul
> >
> >
> > > - Ingmar.
> > >
> > > [1] http://www.w3.org/TR/emma
> > >
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