2010/8/24 Edson Tirelli <span dir="ltr"><<a href="mailto:tirelli@post.com">tirelli@post.com</a>></span><br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><br></div> Wolfgang, <div><br></div><div> The requirement for serializable classes even when not using persistence was a "mistake" made several versions ago and I believed it was fixed. What version of Drools are you using? If that is trunk, we need to fix it.</div>
<div><br></div></blockquote><div>The latest official release 5.1. <br><br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div></div>
<div> Anyway, workaround: for count(), you can simply write "count(1)" instead of using the actual variable,</div></blockquote><div><br>Good to know. OTOH, is there any good reason for count() having an argument at all? Just because all others have an argument? Nowadays, the uniform signature could be (Object... objs) which would, e.g., permit you to write count() without the dummy argument. Others, such as sum, average and especially min and max could easily handle more than one argument. Not a bonanza, but being general is not a bad thing...<br>
<br>-W<br><br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><br></div>
<div> Edson</div><div><br><div class="gmail_quote">2010/8/23 Wolfgang Laun <span dir="ltr"><<a href="mailto:wolfgang.laun@gmail.com" target="_blank">wolfgang.laun@gmail.com</a>></span><div><div></div><div class="h5">
<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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" target="_blank">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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<br></blockquote></div></div></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> JBoss Drools Core Development<br> JBoss by Red Hat @ <a href="http://www.jboss.com" target="_blank">www.jboss.com</a><br>
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