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<div><font size="2">I'm puzzled over the proper use of in-line evals. I've used them successfully in some places. But it seems that on occasion something doesn't work when I think it should.</font></div>
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<div><font size="2">First, this is a when clause that works properly using a separate eval statement. The rule activates and fires when expected:</font></div>
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<div><font face="Courier New" size="2">$rt : RuleTimer(uniqueName == "Hardware Status Request", timedOut == true)</font></div>
<div><font face="Courier New" size="2">$hw : Hardware($activelyMonitored : activelyMonitored, command == null)</font></div>
<div><font face="Courier New" size="2"> AttrBoolean(this == $activelyMonitored, currentValue == true) </font></div>
<div><font face="Courier New" size="2"> eval($hw.getStatusRequested().howOld() > $hw.getStatusPeriod())</font></div>
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<div><font size="2">However, this re-write changing to an in-line eval never fires.</font></div>
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<div><font face="Courier New" size="2">$rt : RuleTimer(uniqueName == "Hardware Status Request", timedOut == true)</font></div>
<div><font face="Courier New" size="2">$hw : Hardware($activelyMonitored : activelyMonitored, command == null, eval(statusRequested.howOld() > statusPeriod) )</font></div>
<div><font face="Courier New" size="2"> AttrBoolean(this == $activelyMonitored, currentValue == true)</font></div>
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<div><font face="Arial, sans-serif" size="2">Likewise, this re-write doesn't fire either where I sought to bind the more complex statusRequested object to a Drools variable before using it in the eval. The field statusPeriod just holds a primitive double.</font></div>
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<div><font face="Courier New" size="2">$rt : RuleTimer(uniqueName == "Hardware Status Request", timedOut == true)</font></div>
<div><font face="Courier New" size="2">$hw : Hardware($activelyMonitored : activelyMonitored, $sr : statusRequested, command == null, </font></div>
<div><font face="Courier New" size="2"> eval($sr.howOld() > statusPeriod) )</font></div>
<div><font face="Courier New" size="2"> AttrBoolean(this == $activelyMonitored, currentValue == true)</font></div>
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<div><font face="Arial, sans-serif" size="2">I haven't been able to find anything in the manual that says these other two syntaxes are wrong. Furthermore, the Drools compiler has no issues with them.</font></div>
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<div><font face="Arial, sans-serif" size="2">Thanks!</font></div>
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<div><font face="Tahoma, sans-serif" size="2" color="#008080">Allen F. Bagwell</font></div>
<div><font face="Tahoma, sans-serif" size="1" color="#008080">e-mail: afbagwe@sandia.gov</font></div>
<div><font face="Tahoma, sans-serif" size="1" color="#008080">phone: 505/284-4517</font></div>
<div><font face="Tahoma, sans-serif" size="1" color="#008080">fax: 505/ 844-7886</font></div>
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