Fabrizio-
from what ive read in the scxml doc you need to configure the datamodel and
their respective data node children directly under the scm root node e.g.
<scxml xmlns="http://www.w3.org/2005/07/scxml";
version="1.0"
initialstate="init-travel-plan">
<datamodel>
<data name="airlineticket">
//you can use the Data macro to reference the current value of the requested
parameters e.g.
//Commons SCXML defines a Data()
function for use in JEXL or EL expressions, for example:
<var name="arrival" expr="Data(hotelbooking, 'hotel/stay/arrival')" />
// The above expression extracts the arrival date from the hotelbooking
// data in the documents datamodel and stores it in a scratch space variable
// named "arrival". The first argument is value of the name attribute of the
// <data> element and the second is the String value of the XPath
// expression. If more than one matching nodes are found, the first one
// is returned. //this is different from your current implementation which
uses data elements associated with a state e.g.
<scxml xmlns="http://www.w3.org/2005/07/scxml";
version="1.0"
initialstate="airline-ticket">
<state id="airline-ticket">
<datamodel>
<data...>
the association of this data would be to airline-ticket and could not be used
in hotel or restaurant
a complete scxml tutorial is available at
http://commons.apache.org/scxml/guide/datamodel.html
HTH
Martin Gainty
______________________________________________
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> From: fmorb...@gmail.com
> Date: Thu, 6 May 2010 10:24:17 -0700
> Subject: Re: [scxml] templating/src/xinclude and returning a value(through
> datamodel/donedata)
> To: user@commons.apache.org
>
> Hi Rahul, thanks for the quick reply. i opened the JIRA ticket for the
> donedata as you suggested.
> But i still cannot get this to work even with your suggested
> modifications. Here is the log of execution (it seems that the
> assignment to AAA doesn't persist).
>
> DEBUG 10:14:22.086 [Thread-1 ] [sax ] endDocument()
> DEBUG 10:14:23.103 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = {=http://www.w3.org/2005/07/scxml,
> cs=http://commons.apache.org/scxml}
> DEBUG 10:14:23.129 [Thread-1 ] [ExpressionFactory ]
> Parsing expression: 10;
> DEBUG 10:14:23.131 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = null
> DEBUG 10:14:23.131 [Thread-1 ] [Context ] cook_time =
> 10
> DEBUG 10:14:23.131 [Thread-1 ] [Context ] AAA =
> [data: null]
> DEBUG 10:14:23.132 [Thread-1 ] [Context ]
> _eventdata = null
> DEBUG 10:14:23.132 [Thread-1 ] [Context ]
> _eventdatamap = {s1.entry=null}
> DEBUG 10:14:23.132 [Thread-1 ] [Context ]
> _eventdata = null
> DEBUG 10:14:23.132 [Thread-1 ] [Context ]
> _eventdatamap = {s11.entry=null, s1.exit=null, s2.entry=null}
> DEBUG 10:14:23.132 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = {=http://www.w3.org/2005/07/scxml,
> cs=http://commons.apache.org/scxml}
> DEBUG 10:14:23.133 [Thread-1 ] [ExpressionFactory ]
> Parsing expression: AAA;
> DEBUG 10:14:23.133 [Thread-1 ] [ExpressionFactory ]
> Parsing expression: 's3';
> DEBUG 10:14:23.134 [Thread-1 ] [ExpressionFactory ]
> Parsing expression: 's3';
> DEBUG 10:14:23.134 [Thread-1 ] [SCXMLSemantics ]
> <assign>: data node 'data' updated
> DEBUG 10:14:23.134 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = null
> DEBUG 10:14:23.134 [Thread-1 ] [Context ]
> _eventdata = null
> DEBUG 10:14:23.134 [Thread-1 ] [Context ]
> _eventdatamap = {s11.exit=null, s12.entry=null, null.change=null,
> s2.done=null}
> DEBUG 10:14:23.134 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = {=http://www.w3.org/2005/07/scxml,
> cs=http://commons.apache.org/scxml}
> DEBUG 10:14:23.134 [Thread-1 ] [ExpressionFactory ]
> Parsing expression: AAA eq 's3';
> DEBUG 10:14:23.134 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = null
> DEBUG 10:14:23.135 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = {=http://www.w3.org/2005/07/scxml,
> cs=http://commons.apache.org/scxml}
> DEBUG 10:14:23.135 [Thread-1 ] [ExpressionFactory ]
> Parsing expression: AAA eq 's4';
> DEBUG 10:14:23.135 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = null
> DEBUG 10:14:23.135 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = {=http://www.w3.org/2005/07/scxml,
> cs=http://commons.apache.org/scxml}
> DEBUG 10:14:23.135 [Thread-1 ] [ExpressionFactory ]
> Parsing expression: AAA;
> INFO 10:14:23.135 [Thread-1 ] [SCXMLSemantics ] null:
> [data: null]
> DEBUG 10:14:23.135 [Thread-1 ] [Context ]
> _ALL_NAMESPACES = null
> DEBUG 10:14:23.135 [Thread-1 ] [Context ]
> _eventdata = null
> DEBUG 10:14:23.135 [Thread-1 ] [Context ]
> _eventdatamap = {s2.exit=null, s12.exit=null, s5.entry=null,
> .done=null}
> DEBUG 10:14:23.135 [Thread-1 ] [Context ]
> _eventdata = null
> DEBUG 10:14:23.135 [Thread-1 ] [Context ]
> _eventdatamap = {s1.entry=null}
> DEBUG 10:14:23.135 [Thread-1 ] [SCXMLExecutor ]
> Current States: [s5]
>
> here are the modified files:
> =============file a.scxml=====================================
> <?xml version="1.0"?>
> <scxml xmlns="http://www.w3.org/2005/07/scxml";
> xmlns:cs="http://commons.apache.org/scxml";
> version="1.0"
> profile="ecmascript"
> initial="s1">
>
> <!-- trivial 5 second microwave oven example -->
> <!-- see http://commons.apache.org/scxml/guide/datamodel.html for
> different way to access the datamodel -->
> <datamodel>
> <data id="cook_time" expr="10"/>
> <data id="AAA" expr="''"/>
> </datamodel>
>
> <state id="s1">
> <!-- off state -->
> <transition target="s2"/>
> </state>
>
> <state id="s2" src="b.scxml#s111">
>
> <!-- on/pause state -->
>
> <transition event="s2.done" cond="AAA eq 's3'" target="s3"/>
> <transition event="s2.done" cond="AAA eq 's4'" target="s4"/>
> <transition event="s2.done" target="s5"/>
> <onexit>
> <log expr="AAA"/>
> </onexit>
> </state>
>
> <final id="s3"/>
> <final id="s4"/>
> <final id="s5"/>
> </scxml>
> =============end of file a.scxml==============================
>
> =============file b.scxml=====================================
> <?xml version="1.0" encoding="us-ascii"?>
> <scxml version="1.0" xmlns="http://www.w3.org/2005/07/scxml";
> xmlns:cs="http://commons.apache.org/scxml"; initial="s111">
> <state id="s111">
> <initial><transition target="s11"/></initial>
>
> <state id="s11">
> <transition target="s12">
> <!--<cs:var name="aaa" expr="'s3'" />-->
> <assign location="AAA" expr="'s3'"/>
> </transition>
> </state>
>
> <final id="s12">
> </final>
> </state>
> </scxml>
> =============end of file b.scxml==============================
>
> thanks,
> fabrizio.
>
> On Thu, May 6, 2010 at 09:52, Rahul Akolkar <rahul.akol...@gmail.com> wrote:
> > On Thu, May 6, 2010 at 11:34 AM, Fabrizio Morbini <fmorb...@gmail.com>
> > wrote:
> >> Hi, i'm experimenting with the src attribute to reuse fsm. I'm having
> >> some trouble with returning a value from an included fsm to the
> >> calling state.
> >>
> >> I'm using this description at
> >> http://shale.apache.org/shale-dialog-scxml/index.html, in particular
> >> the section about subdialogs from which it seems possible to return a
> >> value from an included scxml fsm.
> >> However i have been unable to do so. I've tried several variants but
> >> none with the expected outcome.
> > <snip/>
> >
> > The Commons SCXML v0.9 release does not use a flat / global datamodel
> > by default, therefore the value would need to be copied up to a
> > datamodel with a superior position in the states topology (such as
> > document root to be available across any other state). I will outline
> > this approach using your example below.
> >
> > Alternatively, provide the SCXMLExecutor with a custom Evaluator
> > implementation that returns the same context (the root context) on
> > every Evaluator#newContext() call to obtain a flat datamodel. If you
> > do this, there would be no changes required to the example below.
> >
> > Now, for the first approach with the default cascading datamodel, see below:
> >
> >
> >> Here is the current variant:
> >>
> >> =============file a.scxml=====================================
> >> <?xml version="1.0"?>
> >> <scxml xmlns="http://www.w3.org/2005/07/scxml";
> >> xmlns:cs="http://commons.apache.org/scxml";
> >> version="1.0"
> >> profile="ecmascript"
> >> initial="s1">
> >>
> >> <!-- trivial 5 second microwave oven example -->
> >> <!-- see http://commons.apache.org/scxml/guide/datamodel.html for
> >> different way to access the datamodel -->
> >> <datamodel>
> >> <data id="cook_time" expr="10"/>
> > <snap/>
> >
> > Define a global 'aaa' variable here, say like so (note different case
> > used here, i.e. chose a different name of choice):
> >
> > <data id="AAA" />
> >
> >
> >> </datamodel>
> >>
> >> <state id="s1">
> >> <!-- off state -->
> >> <transition target="s2"/>
> >> </state>
> >>
> >> <state id="s2" src="b.scxml#s111">
> >>
> >> <!-- on/pause state -->
> >>
> >> <transition event="s2.done" cond="aaa eq 's3'" target="s3"/>
> >> <transition event="s2.done" cond="aaa eq 's4'" target="s4"/>
> >> <transition event="s2.done" target="s5"/>
> >>
> >> </state>
> >>
> >> <final id="s3"/>
> >> <final id="s4"/>
> >> <final id="s5"/>
> >> </scxml>
> >> =============end of file a.scxml==============================
> >>
> >> =============file b.scxml=====================================
> >> <?xml version="1.0" encoding="us-ascii"?>
> >> <scxml version="1.0" xmlns="http://www.w3.org/2005/07/scxml";
> >> xmlns:cs="http://commons.apache.org/scxml"; initial="s111">
> >> <state id="s111">
> >> <initial><transition target="s11"/></initial>
> >> <datamodel><data id="aaa"/></datamodel>
> >>
> >> <state id="s11">
> >> <transition target="s12">
> >> <!--<cs:var name="aaa" expr="'s3'" />-->
> >> <assign location="aaa" expr="'s3'"/>
> > <snip/>
> >
> > Change the above to point to the variable defined in the parent
> > document above like so:
> >
> > <assign location="AAA" expr="'s3'"/>
> >
> > Obviously, this would imply that b.scxml could only be executed when
> > included in a.scxml since it references a datamodel variable in
> > a.scxml. If that is not desired, the second approach i.e. the flat
> > datamodel approach should be used.
> >
> >
> >> </transition>
> >> </state>
> >>
> >> <final id="s12">
> >> </final>
> >> </state>
> >> </scxml>
> >> =============end of file b.scxml==============================
> >>
> >> i tried to use also <var> instead of a previously defined variable in
> >> the datamodel, without success.
> >>
> >> the simple way would be to use the donedata in a final state in the
> >> included fsm but it doesn't seem that donedata is supported, is this
> >> correct?
> >>
> > <snap/>
> >
> > Yes, not in v0.9, we will look to add it soon. You could open a JIRA
> > issue as a reminder.
> >
> >
> >> given that src is not going to be supported in the next standard, do
> >> you have some pointer to examples/doc of how to use xinclude to do
> >> what the src is supposed to do?
> >>
> > <snip/>
> >
> > Don't have a ready example, but the idea is to pull in as much of the
> > document as needs to be reused using XInclude. See XInclude
> > specification for more details. It certain cases, the XInclude
> > approach requires more work but is favored since its a standard way to
> > do includes.
> >
> > -Rahul
> >
> >
> >> thanks,
> >> fabrizio.
> >>
> >
> > ---------------------------------------------------------------------
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> > For additional commands, e-mail: user-h...@commons.apache.org
> >
> >
>
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