Andy
the state is either triggered or not triggered depending on the boolean
evaluation of cond e.g.
<state id="foo3">
<!--
... some content ...
-->
<transition event="foo.bar" cond="true"
target next="bar" />
</state>
for now just try hardcoding cond to evaluate to true (and see if that will
activate the state)
http://commons.apache.org/scxml/guide/scxml-documents.html#custom
sorry..did'nt mean to jump in mid-thread rahul!
Martin Gainty
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> Subject: RE: [Commons SCXML] - Parallel states and external invocation. Best
> practice.
> Date: Tue, 20 Apr 2010 16:27:00 +0100
> From: amans...@globeop.com
> To: user@commons.apache.org
>
> Sorry yes, the src attribute.
>
> Essentially what I want to be able to do is something like :
>
> <parallel id="p1">
>
> <state id="region1">
>
> <state id="sub1">
> <invoke targettype="component_invoker" src="comp1"/>
> <transition event="sub1.invoke.done" target="final1" />
> </state>
>
> <final id="final1"/>
>
> </state>
>
> <state id="region2">
>
> <state id="sub2">
> <invoke targettype="scxml" src="sub-statemachine.xml"/>
> <transition event="sub2.invoke.done" target="final2" />
> </state>
>
> <final id="final2"/>
>
> </state>
>
> <transition event="p1.done" target="s3" />
>
> </parallel>
>
> When I tested it the sub statemachine would never fire.
>
> Thanks,
> Andy
>
> -----Original Message-----
> From: Rahul Akolkar [mailto:rahul.akol...@gmail.com]
> Sent: 20 April 2010 16:24
> To: Commons Users List
> Subject: Re: [Commons SCXML] - Parallel states and external invocation. Best
> practice.
>
> On Tue, Apr 20, 2010 at 9:46 AM, Andrew Mansfield <amans...@globeop.com>
> wrote:
> > Hi Rahul,
> >
> > One other question if I may and assuming it's possible.
> >
> > Can I start a new state machine from one of the sub states i.e. sub2
> > (using src="my.xml") and have that follow the same logic i.e. the
> > parallel execution will wait for the sub state machine to execute.
> >
> <snip/>
>
> Do you mean src attribute of <state> (which has now been removed from latest
> version of the W3C draft) or src attribute of <invoke> ?
>
>
> > I tried using the invoke with srctype of scxml and the document name
> > but for whatever reason it didn't fire.
> >
> <snap/>
>
> There isn't a srctype attribute on <invoke>, did you mean type?
>
> -Rahul
>
>
> > Regards,
> > Andy
> >
> > -----Original Message-----
> > From: Andrew Mansfield [mailto:amans...@globeop.com]
> > Sent: 20 April 2010 13:38
> > To: Commons Users List
> > Subject: RE: [Commons SCXML] - Parallel states and external invocation.
> > Best practice.
> >
> > That's a tidy solution. Worked a charm.
> >
> > Thanks,
> > Andy
> >
> > -----Original Message-----
> > From: Rahul Akolkar [mailto:rahul.akol...@gmail.com]
> > Sent: 19 April 2010 22:26
> > To: Commons Users List
> > Subject: Re: [Commons SCXML] - Parallel states and external invocation.
> > Best practice.
> >
> > On Mon, Apr 19, 2010 at 7:33 AM, Andrew Mansfield
> > <amans...@globeop.com>
> > wrote:
> >> Hi,
> >>
> >> I am attempting to build a state machine that essentially models my
> >> applications workflow.
> >>
> >> To do this I have built a simple custom component invoker that can be
> >> executed from the <invoke/> tag to execute Java code. The
> >> 'id.invoke.done' event simply transitions to the next state in the
> >> workflow. The flexibility is required as components will be plugged
> >> in
> >
> >> for different configurations to change default behaviour often.
> >>
> >> e.g.
> >>
> >> <state id="s1">
> >> <invoke targettype="component_invoker"
> >> srcexpr="componentId1"/>
> >> <transition event="s1.invoke.done" cond="cond1 != null"
> >> target="s2" />
> >> <transition event="s1.invoke.done" target="s3" />
> >> </state>
> >>
> >> <state id="s2">
> >> <invoke targettype="component_invoker"
> >> srcexpr="componentId2"/>
> >> <transition event="s2.invoke.done" target="s3" />
> >> </state>
> >>
> >> <state id="s3" final="true">
> >>
> >> </state>
> >>
> >> What I want to do is allow for parallel execution of states which
> >> themselves have the abilty to invoke external code. I.e.
> >>
> >> <state id="s1">
> >> <invoke targettype="component_invoker"
> >> srcexpr="componentId1"/>
> >> <transition event="s1.invoke.done" cond="cond1 != null"
> >> target="s2" />
> >> <transition event="s1.invoke.done" target="s3" />
> >> </state>
> >>
> >> <state id="s2">
> >> <invoke targettype="component_invoker"
> >> srcexpr="componentId2"/>
> >> <transition event="s2.invoke.done" target="p1" />
> >> </state>
> >>
> >> <parallel id="p1">
> >>
> >> <state id="sub1">
> >> <invoke targettype="component_invoker" src="comp1"/>
> >> <transition event="sub1.invoke.done" target="s3" />
> >> </state>
> >>
> >> <state id="sub2">
> >> <invoke targettype="component_invoker" src="comp2"/>
> >> <transition event="sub2.invoke.done" target="s3" />
> >> </state>
> >>
> >> <transition event="p1.done" target="s3" />
> >>
> >> </parallel>
> >>
> >> <state id="s3" final="true">
> >>
> >> </state>
> >>
> >> What I can;t seem to work out is how to exit my component invocations
> >> from the substates correctly. Is it event possible to achieve what I
> >> am trying to do or is there a better way to do this ?
> >>
> > <snip/>
> >
> > Sure, it is possible.
> >
> > When the orthogonal regions have no substructure, any of the
> > transitions such as those gating on events "sub1.invoke.done" or
> > "sub2.invoke.done"
> > cause the entire parallel to be exited. If you want join-like behavior
> > where the parallel waits for both invokes (or more, if more than two
> > regions) to be finished before transitioning out, then its best to
> > model it as such using final children of regions and waiting for all
> > regions to transition to their respective finals.
> >
> > So, reworking the example above, along these lines:
> >
> > <state id="s1">
> > <invoke targettype="component_invoker" srcexpr="componentId1"/>
> > <transition event="s1.invoke.done" cond="cond1 != null" target="s2"
> > />
> > <transition event="s1.invoke.done" target="s3" />
> > </state>
> >
> > <state id="s2">
> > <invoke targettype="component_invoker" srcexpr="componentId2"/>
> > <transition event="s2.invoke.done" target="p1" />
> > </state>
> >
> > <parallel id="p1">
> >
> > <state id="region1">
> >
> > <state id="sub1">
> > <invoke targettype="component_invoker" src="comp1"/>
> > <transition event="sub1.invoke.done" target="final1" />
> > </state>
> >
> > <final id="final1"/>
> >
> > </state>
> >
> > <state id="region2">
> >
> > <state id="sub2">
> > <invoke targettype="component_invoker" src="comp2"/>
> > <transition event="sub2.invoke.done" target="final2" />
> > </state>
> >
> > <final id="final2"/>
> >
> > </state>
> >
> > <transition event="p1.done" target="s3" />
> >
> > </parallel>
> >
> > <state id="s3" final="true">
> > ...
> >
> > -Rahul
> >
> >
> >> Any help would be much appreciated.
> >>
> >> Regards,
> >> Andy
> >>
> >
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