No, not knowingly :-) I'm using the simplest possible setup for KnowledgeBase, KnowledgeBuilder, StatefulKnowledgeSession.<br><br>Why should accumulate/count effect persistence?<br><br>-W<br><br><br><div class="gmail_quote">
2010/8/23 Swindells, Thomas <span dir="ltr"><<a href="mailto:TSwindells@nds.com">TSwindells@nds.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">You’ve probably configured your system to be using persistence?</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">In which case what you are persisting needs to be serializable so that it can be persisted</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Thomas</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt;" lang="EN-US">From:</span></b><span style="font-size: 10pt;" lang="EN-US"> <a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a> [mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>]
<b>On Behalf Of </b>Wolfgang Laun<br>
<b>Sent:</b> 23 August 2010 12:17<br>
<b>To:</b> Rules Users List<br>
<b>Subject:</b> [rules-users] counting facts of a kind</span></p>
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<p class="MsoNormal"> </p>
<p class="MsoNormal">As simple as it gets:<br>
<br>
rule countHigh<br>
when<br>
$n : Number() from accumulate ( $sgc : StartGoalConn() count( $sgc ) )<br>
then<br>
System.out.println( "plain routes: " + $n );<br>
end<br>
<br>
And yet, it fails:<br>
<br>
Exception in thread "main" org.drools.RuntimeDroolsException: java.lang.ClassCastException: rss.ixl.route.TrainStartGoalConn cannot be cast to java.io.Serializable<br>
<br>
Sure, adding "implements Serializable" to StartGoalConn fixes this. But why is this necessary?<br>
<br>
FYI, StartGoalConn is abstract superclass of TrainStartGoalConn - just in case this has some bearing on this issue.<br>
<br>
Best<br>
-W</p>
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