[scxml] update datamodel

Sat, 04 Sep 2010 10:06:30 -0700 

Hello,

I've a simple state machine

<?xml version="1.0" encoding="UTF-8"?>
<scxml xmlns="http://www.w3.org/2005/07/scxml"; version="1.0"
name="Fan2" initial="Off" exmode="strict">
        <datamodel>
                <data id="T" expr="10"/>
        </datamodel>
        <state id="Off">
                <onentry>
                        <log expr="'OnEntry Off'"/>
                </onentry>
                <transition cond="T &gt; 30" target="On"/>
                <onexit>
                        <log expr="'OnExit Off'"/>
                </onexit>
        </state>
        <state id="On">
                <onentry>
                        <log expr="'OnEntry On'"/>
                </onentry>
                <transition cond="T &lt; 20" target="Off"/>
                <onexit>
                        <log expr="'OnExit On'"/>
                </onexit>
        </state>
</scxml>

and like to update T through Java. I tried this:

fan2.getEngine().getRootContext().set("T", "40");

but somehow the engine does not switch into the new state. Do I have
to manually trigger the engine to reevaluate all expression or what
I'am missing?

Thanks in advance for any hint

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