Re: [SCXML] Some problem while using custom action

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

Again, please prefix Commons SCXML related posts with [SCXML] in the
email subject as I've added here.

On Wed, Feb 4, 2009 at 7:32 AM, Saurabh Agarwal <sa...@gmail.com> wrote:
> Hi All,
>
> I was trying to run the example of custom Action but it is not running .
>
> I am pasting the codde snippet of all the files for custom action , Please
> let me know where I am wrong :
>
<snip/>

Not sure what the StopClock class below is doing, I suspect it may be
inheriting from AbstractStateMachine. Since you have adapted some test
code, I would suggest adapting a complete test that uses custom
actions. Once you've parsed the document, I would also recommend
instantiating the SCXMLExecutor as described here [1] and using it as
described here [2].

-Rahul

[1] http://commons.apache.org/scxml/guide/core-engine.html
[2] http://commons.apache.org/scxml/guide/core-events.html


> 1. StopWatch.xml
> <scxml xmlns="http://www.w3.org/2005/07/scxml" *xmlns:my="
> http://my.custom-actions.domain/CUSTOM1"*
>
>       version="1.0"
>       initialstate="reset">
>
>    <state id="reset">
>        <onentry>
>            *<my:hello name="saurabh" />*
>            <!-- foo:bar also maps to Hello action -->
>            <!--foo:bar name="custom action" /-->
>        </onentry>
>
>   </state>
>    <state id="running">
>        <transition event="watch.split"   target="paused"/>
>        <transition event="watch.stop"    target="stopped"/>
>    </state>
>
>    <state id="paused">
>        <transition event="watch.unsplit" target="running"/>
>        <transition event="watch.stop"    target="stopped"/>
>    </state>
>
>    <state id="stopped">
>        <transition event="watch.reset"   target="reset"/>
>    </state>
>
> </scxml>
>
>
> *2. Code Snippet of my APP Starting the State machine :*
>
>  protected void doInvite(SipServletRequest request)
>        throws ServletException, IOException {
>         log(" $$$    ############################ SimpleProxyServlet: Got
> request:\n" + request+" TO::"+request.getTo());
>         log (" New log To::"+request.getTo().toString());
>         HashMap aMap=new HashMap() ;
>         aMap.put("SipMessage",request.toString() );
>         SimpleContext sc=new SimpleContext(aMap);
>
>
>         // (1) Create a list of custom actions, add as many as are needed
>      *List customActions = new ArrayList();
>      CustomAction ca =
>            new CustomAction("http://my.custom-actions.domain/CUSTOM",
>                             "hello", Hello.class);
>      customActions.add(ca);
>
>      // (2) Parse the SCXML document containing the custom action(s)
>      SCXML scxml = null;
>        try {
>            // try {URL url=new URL
> (StopClock.class.getClassLoader().getResource("PocAS/stopwatch.xml"));
>            scxml =
> SCXMLParser.parse(StopClock.class.getClassLoader().getResource("PocAS/stopwatch.xml"),
> new SimpleErrorHandler(), customActions);
>            // Also see other methods in SCXMLParser API
>            // "url" points to SCXML document
>            // "errorHandler" is SAX ErrorHandler
>        } catch (SAXException ex) {
>            Logger.getLogger(MainPocAS.class.getName()).log(Level.SEVERE,
> null, ex);
>        } catch (ModelException ex) {
>            Logger.getLogger(MainPocAS.class.getName()).log(Level.SEVERE,
> null, ex);
>        }
>          // Also see other methods in SCXMLParser API
>          // "url" points to SCXML document
>          // "errorHandler" is SAX ErrorHandler
>
>         StopClock clock=new StopClock(scxml);*
>
>         clock.getEngine().setRootContext(sc);
>
>        // if(request.getTo().toString().equals("Alice1"))
>            clock.fireEvent(StopClock.EVENT_RESET);
>
> 3 . Java File of Action ( Hello from commons-scxml - copypasting the imp
> snippet )
> public class Hello extends Action implements ExternalContent {
>
>      /** Serial version UID. */
>      private static final long serialVersionUID = 1L;
>      /** This is who we say hello to. */
>     private String name;
>     /** We count callbacks to execute() as part of the test suite. */
>      public static int callbacks = 0;
>
>      /** Public constructor is needed for the I in SCXML IO. */
>      public Hello() {
>          super();
>          System.out.println("Hello: Got in Hello constructor...");
>      }
>
>      /**
>       * Get the name.
>       *
>       * @return Returns the name.
>       */
>      public String getName() {
>          System.out.println("Hello: getName");
>         return name;
>     }
>
>     /**
>      * Set the name.
>      *
>      * @param name The name to set.
>       */
>      public void setName(String name) {
>         this.name = name;
>         System.out.println("Hello:  setName");
>     }
>
>      /**
>       * @inheritDoc
>       */
>      public void execute(final EventDispatcher evtDispatcher,
>              final ErrorReporter errRep, final SCInstance scInstance,
>              final Log appLog, final Collection derivedEvents)
>     throws ModelException, SCXMLExpressionException {
>
>          System.out.println("Hello: execute");
>          if (appLog.isInfoEnabled()) {
>              appLog.info("Hello " + name);
>          }
>          // For derived events payload testing
>          TriggerEvent event =
>              new TriggerEvent("helloevent", TriggerEvent.SIGNAL_EVENT,
> name);
>          derivedEvents.add(event);
>          callbacks++;
>      }
>
>    public List getExternalNodes() {
>        throw new UnsupportedOperationException("Not supported yet.");
>    }
>  }
>
>
>
>
> Please let me know what I am doing wrong .
>
> Thanks & Regards
> Saurabh
>
>
> --
>
> "Successful people make more mistakes because they do more "
> Thanks
> Saurabh Agarwal
>

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