Re: [SCXML] Access to Context from custom action

[Rahul Akolkar <ra...@gmail.com>]

I forgot to mention that this is a shared list and we prefix email
subjects with the component name (so, in this case, I've now added
[SCXML] to the subject). Please use this convention going forward,
thanks.

On Thu, Jul 17, 2008 at 1:29 PM, Rahul Akolkar <ra...@gmail.com> wrote:
> On Thu, Jul 17, 2008 at 4:37 AM, Berg, T.W. (Tom) van den
> <to...@tno.nl> wrote:
>> What are the Java API calls the access the local Context (datamodel)
>> from a custom action?
> <snip/>
>
> Short reply since I'm running out of email time.
>
> You have a handle to the SCInstance (use the expression evaluator
> rather than context lookup where appropriate):
>
>  http://commons.apache.org/scxml/0.8/apidocs/org/apache/commons/scxml/SCInstance.html
>
>
>> And what is the Jexl code to do the same from the SCXML document?
>>
> <snap/>
>
> See this page (particularly, the latter half):
>
>  http://commons.apache.org/scxml/guide/datamodel.html
>
>
>> For example, for the following simple SCML document:
>> - How can I retrieve the value "NAME1" from the custom action
>> rti:register ?
> <snip/>
>
> All expressions untested, but meant to give you some hints:
>
> <cs:var name="retrievedvalue" expr="Data(label, 'value')"/>
>
>
>> - How can I change this value from the custom action ?
> <snap/>
>
> <assign location="Data(label, 'value')" expr="'NAME2'"/>
>
>
>> - What is the Jexl code to pass the value NAME1 as parameter into
>> rti:register  (e.g. instead of using "doRegister") ?
>>
> <snip/>
>
> See this post:
>
>  http://markmail.org/message/a3dtad2sfipehois
>
> The rest of that thread may be useful to glance at as well.
>
> -Rahul
>
>
>
>> Any help appreciated.
>> Thanks,
>> Tom van den Berg
>>
>>
>> <scxml xmlns="http://www.w3.org/2005/07/scxml"
>>       xmlns:rti="http://rti.actions/CUSTOM"
>>       version="1.0"
>>       initialstate="SyncPoint">
>>
>>  <state id="SyncPoint">
>>
>>  <datamodel>
>>   <data name="label">
>>    <value>NAME1</value>
>>   </data>
>>  </datamodel>
>>
>>  <initial>
>>   <transition target="registered"/>
>>  </initial>
>>
>>  <state id="registered">
>>   <onentry>
>>    <rti:register name="doRegister"/>
>>   </onentry>
>>   <transition event="confirmed" target="confirmed"/>
>>   <transition event="error" target="error"/>
>>  </state>
>>
>>  <state id="confirmed">
>>   <onentry>
>>    <rti:confirm name="doConfirm" />
>>   </onentry>
>>   <transition target="end"/>
>>   <transition event="error" target="error"/>
>>  </state>
>>
>>  <final id="end"/>
>>
>>  <state id="error"></state>
>>  </state>
>>
>> </scxml>
>>
>>
>

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