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https://issues.apache.org/jira/browse/SCXML-164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ate Douma closed SCXML-164.
---------------------------
Resolution: Won't Fix
Fix Version/s: (was: 2.0)
After looking at this example in more detail it turns out it uses a model
configuration which no longer is valid nor supported with the latest SCXML
specification and neither Commons SCXML 2+.
So further investigating this doesn't make much sense anymore.
> In Parallel, it is not work when State transitions to History.
> --------------------------------------------------------------
>
> Key: SCXML-164
> URL: https://issues.apache.org/jira/browse/SCXML-164
> Project: Commons SCXML
> Issue Type: Bug
> Affects Versions: 0.9
> Environment: MAC OS X version 10.6.8
> Reporter: Arnon
>
> The problem was occurred when using Parallel and History together.
> 2011-12-28 15:08:03,775 INFO : Illegal state machine configuration!
> org.apache.commons.scxml.model.ModelException: Illegal state machine
> configuration!
> at
> org.apache.commons.scxml.semantics.SCXMLSemanticsImpl.followTransitions(SCXMLSemanticsImpl.java:703)
> at
> org.apache.commons.scxml.SCXMLExecutor.triggerEvents(SCXMLExecutor.java:127)
> at
> org.apache.commons.scxml.env.AbstractStateMachine.fireEvent(AbstractStateMachine.java:201)
> This exception was fired when transition from "S1" to "History" by
> triggering "Sig1" event (History was already memorized). After the
> investigation, if we want to transition to History in any States in Parallel,
> it seems that SCXML requires triggering the same event(that is "Sig1" in this
> case) for all States in Parallel node(It works fine if we create Transition
> to self with event "Sig1" on State "S10"), which I think it is not correct.
> The equivalent SCXML is following:
> <?xml version="1.0" encoding="UTF-8"?>
> <scxml xmlns="http://www.w3.org/2005/07/scxml"; version="null"
> initial="Main">
> <!-- http://commons.apache.org/scxml -->
> <parallel id="Main">
> <state id="region_Region1">
> <initial>
> <transition target="S1">
> </transition>
> </initial>
> <state id="S7">
> <initial>
> <transition target="s4">
> </transition>
> </initial>
> <history id="History" type="shallow">
> <transition>
> <target> <state id="s4">
> <transition event="Sig3" target="S3">
> </transition>
> </state>
> </target> </transition>
> </history>
> <transition event="Sig2" target="S1">
> </transition>
> <state id="S3">
> </state>
> <state id="s4">
> <transition event="Sig3" target="S3">
> </transition>
> </state>
> </state>
> <state id="S1">
> <transition event="Sig1" target="History">
> </transition>
> <transition event="Sig0" target="S7">
> </transition>
> </state>
> </state>
> <state id="region_Region2">
> <initial>
> <transition target="S10">
> </transition>
> </initial>
> <state id="S10">
> </state>
> </state>
> </parallel>
> </scxml>
> From the source, active states was not valid in Parallel
> if (!SCXMLHelper.isLegalConfig(targetSet, errorReporter)) {
> throw new ModelException("Illegal state machine
> configuration!");
> }
> in SCXMLHelper.isLegalConfig(targetSet, errorReporter):
> if (tt instanceof Parallel) {
> Parallel p = (Parallel) tt;
> if (count.size() < p.getChildren().size()) {
> errRep.onError(ErrorConstants.ILLEGAL_CONFIG,
> "Not all AND states active for parallel "
> + p.getId(), entry);
> legalConfig = false;
> }
> }
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