<br> Drools 4.0.7 is the stable version where things just work! Drools 4 uses MVEL 1.3. The error bellow means your "p" variable is not set. Are you setting your global before asserting the facts???<br><br> Drools 5.0M2 is a milestone release of the development version. If you want to use Drools 5 development version we recommend you checkout and build from trunk, because a lot of things were developed/fixed **after** M2 was released. Drools 5 requires MVEL <a href="http://2.0.1.">2.0.1.</a><br>
<br> []s<br> Edson<br><br><div class="gmail_quote">2008/11/7 <span dir="ltr"><<a href="mailto:shikha.x.aggarwal@jpmchase.com">shikha.x.aggarwal@jpmchase.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;">
<br><font size="2" face="sans-serif">Hi, I am so confused with which version
of DROOLS I should be using . I trid with 5.0.0 M2 and the error I saw
is below. Then I tried with 4.0.7 but it gave error as below it had references
of 1.4 of MVEL version.</font>
<br><font color="red" size="2" face="Courier New">Exception in thread "main"
</font><font color="#000080" size="2" face="Courier New"><u>org.mvel.PropertyAccessException</u></font><font color="red" size="2" face="Courier New">:
null pointer exception in property: p.getUsers()</font>
<br><font color="red" size="2" face="Courier New">
at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(</font><font color="#000080" size="2" face="Courier New"><u>ReflectiveAccessorOptimizer.java:143</u></font><font color="red" size="2" face="Courier New">)</font>
<br><font color="red" size="2" face="Courier New">
at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(</font><font color="#000080" size="2" face="Courier New"><u>ReflectiveAccessorOptimizer.java:96</u></font><font color="red" size="2" face="Courier New">)</font>
<br><font color="red" size="2" face="Courier New">
at org.mvel.ASTNode.getReducedValueAccelerated(</font><font color="#000080" size="2" face="Courier New"><u>ASTNode.java:194</u></font><font color="red" size="2" face="Courier New">)</font>
<br><font color="red" size="2" face="Courier New">
at org.mvel.MVELRuntime.execute(</font><font color="#000080" size="2" face="Courier New"><u>MVELRuntime.java:87</u></font><font color="red" size="2" face="Courier New">)</font>
<br><font color="red" size="2" face="Courier New">
at org.mvel.CompiledExpression.getValue(</font><font color="#000080" size="2" face="Courier New"><u>CompiledExpression.java:98</u></font><font color="red" size="2" face="Courier New">)</font>
<br><font color="red" size="2" face="Courier New">
at org.mvel.MVEL.executeExpression(</font><font color="#000080" size="2" face="Courier New"><u>MVEL.java:219</u></font><font color="red" size="2" face="Courier New">)</font>
<br>
<br><font size="2" face="sans-serif">Can you please suggest which version
of DROOLS should I be using? can you direc me to the MAVEN site.</font>
<br>
<br><font size="2" face="sans-serif">Thanks</font>
<br><font size="2" face="sans-serif">shikha</font>
<br>
<br>
<br>
<table width="100%">
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<td width="40%"><font size="1" face="sans-serif"><b>"Edson Tirelli"
<<a href="mailto:tirelli@post.com" target="_blank">tirelli@post.com</a>></b> </font>
<br><div class="Ih2E3d"><font size="1" face="sans-serif">Sent by: <a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a></font>
</div><p><font size="1" face="sans-serif">11/06/2008 03:12 PM</font></p><div><div></div><div class="Wj3C7c">
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<div align="right"><font size="1" face="sans-serif">Subject</font></div>
</td><td><font size="1" face="sans-serif">Re: [rules-users] DROOLS from clause
giving Error</font></td></tr></tbody></table>
<br>
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<td>
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<br>
<br>
<br><font size="3"><br>
This is an MVEL problem that Mike fixed in one of the latest versions:
it was raising that error message when unable to resolve a variable reference
(processor in this case).<br>
<br>
Can you please confirm what versions of drools and mvel are you
using?<br>
<br>
Also, try to use mvel syntax, just in case:<br>
</font><font size="2" face="Courier New"><br>
$x : DBSubscription(report == $event.report) </font><font color="#a00000" size="2" face="Courier New"><b>from</b></font><font size="2" face="Courier New">
processor.users</font><font size="3"><br>
<br>
[]s<br>
Edson<br>
</font>
<br><font size="3">2008/11/6 <</font><a href="mailto:shikha.x.aggarwal@jpmchase.com" target="_blank"><font color="blue" size="3"><u>shikha.x.aggarwal@jpmchase.com</u></font></a><font size="3">></font>
<br><font size="2" face="sans-serif"><br>
Thanks for the quick respose..I modified the rule now to -</font><font size="3">
<br>
</font><font color="#a00000" size="2" face="Courier New"><b><br>
package</b></font><font size="2" face="Courier New"> org.drools.examples;</font><font size="3">
<br>
</font><font color="#a00000" size="2" face="Courier New"><b><br>
import</b></font><font size="2" face="Courier New"> org.drools.examples.templates.DBSubscription;</font><font size="3">
</font><font color="#a00000" size="2" face="Courier New"><b><br>
import</b></font><font size="2" face="Courier New"> org.drools.examples.templates.Event;</font><font size="3">
<br>
</font><font color="#a00000" size="2" face="Courier New"><b><br>
global</b></font><font size="2" face="Courier New"> java.util.List list</font><font size="3">
</font><font color="#a00000" size="2" face="Courier New"><b><br>
global</b></font><font size="2" face="Courier New"> org.drools.examples.Processor
processor;</font><font size="3"> </font>
<br><font color="#a00000" size="2" face="Courier New"><b><br>
rule</b></font><font size="2" face="Courier New"> </font><font color="#008000" size="2" face="Courier New">"Rule1"</font><font size="3">
</font><font size="2" face="Courier New"><br>
</font><font color="#a00000" size="2" face="Courier New"><b>when</b></font><font size="3">
</font><font size="2" face="Courier New"><br>
$event : Event(eventId == </font><font color="#008000" size="2" face="Courier New">"eventId.IR.001"</font><font size="2" face="Courier New">)
</font>
<br><font size="2" face="Courier New">
$x : DBSubscription(report == $event.report) </font><font color="#a00000" size="2" face="Courier New"><b>from</b></font><font size="2" face="Courier New">
processor.getUsers() <br>
</font><font color="#a00000" size="2" face="Courier New"><b>then</b></font><font size="3">
</font><font size="2" face="Courier New"><br>
list.add($x);
</font><font size="3"> </font><font color="#a00000" size="2" face="Courier New"><b><br>
end</b></font><font size="3"> <br>
</font><font size="2" face="Courier New"><b><br>
Still facing some issue, Looking into it</b></font><font size="3"> <br>
</font><font color="red" size="2" face="Courier New"><br>
Exception in thread "main" [Error: unbalanced braces ( ... )]</font><font size="3">
</font><font color="red" size="2" face="Courier New"><br>
[Near : {... processor.getUsers( ....}]</font><font size="3"> </font><font color="red" size="2" face="Courier New"><br>
at org.mvel.util.ParseTools.balancedCapture(</font><font color="#000080" size="2" face="Courier New"><u>ParseTools.java:1134</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
</font><font color="red" size="2" face="Courier New"><br>
at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(</font><font color="#000080" size="2" face="Courier New"><u>ReflectiveAccessorOptimizer.java:550</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
</font><font color="red" size="2" face="Courier New"><br>
at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(</font><font color="#000080" size="2" face="Courier New"><u>ReflectiveAccessorOptimizer.java:438</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
</font><font color="red" size="2" face="Courier New"><br>
at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(</font><font color="#000080" size="2" face="Courier New"><u>ReflectiveAccessorOptimizer.java:265</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
</font><font color="red" size="2" face="Courier New"><br>
at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(</font><font color="#000080" size="2" face="Courier New"><u>ReflectiveAccessorOptimizer.java:126</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
</font><font color="red" size="2" face="Courier New"><br>
at org.mvel.ast.ASTNode.getReducedValueAccelerated(</font><font color="#000080" size="2" face="Courier New"><u>ASTNode.java:141</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
</font><font color="red" size="2" face="Courier New"><br>
at org.mvel.MVELRuntime.execute(</font><font color="#000080" size="2" face="Courier New"><u>MVELRuntime.java:77</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
<br>
<br>
<br>
</font>
<table width="100%">
<tbody><tr valign="top">
<td width="50%"><font size="1" face="sans-serif"><b>"David Sinclair"
<</b></font><a href="mailto:dsinclair@chariotsolutions.com" target="_blank"><font color="blue" size="1" face="sans-serif"><b><u>dsinclair@chariotsolutions.com</u></b></font></a><font size="1" face="sans-serif"><b>></b>
<br>
Sent by: </font><a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank"><font color="blue" size="1" face="sans-serif"><u>rules-users-bounces@lists.jboss.org</u></font></a><font size="3">
</font>
<p><font size="1" face="sans-serif">11/06/2008 02:19 PM</font><font size="3">
</font>
</p><p>
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<</font><a href="mailto:rules-users@lists.jboss.org" target="_blank"><font color="blue" size="1" face="sans-serif"><u>rules-users@lists.jboss.org</u></font></a><font size="1" face="sans-serif">></font><font size="3">
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<div align="right"><font size="1" face="sans-serif">Subject</font></div>
</td><td><font size="1" face="sans-serif">Re: [rules-users] DROOLS from clause
giving Error</font></td></tr></tbody></table>
<br>
<br>
<table width="100%">
<tbody><tr valign="top">
<td width="50%">
</td><td width="50%"></td></tr></tbody></table>
<br></td></tr></tbody></table>
<br><font size="3"><br>
<br>
<br>
What is Processor? Doesn't look like it is a bound variable. Is it from
DBSubscription? <br>
<br>
On Thu, Nov 6, 2008 at 2:11 PM, <</font><a href="mailto:shikha.x.aggarwal@jpmchase.com" target="_blank"><font color="blue" size="3"><u>shikha.x.aggarwal@jpmchase.com</u></font></a><font size="3">>
wrote: </font><font size="2" face="sans-serif"><br>
<br>
Hi, <br>
<br>
I am using the from clause of drools and have written the following expression
- </font><font color="#a00000" size="2" face="Courier New"><b><br>
rule</b></font><font size="2" face="Courier New"> </font><font color="#008000" size="2" face="Courier New">"Rule1"</font><font size="3">
</font><font size="2" face="Courier New"><br>
</font><font color="#a00000" size="2" face="Courier New"><b>when</b></font><font size="3">
</font><font size="2" face="Courier New"><br>
$event : Event(eventId
== </font><font color="#008000" size="2" face="Courier New">"eventId.IR.001"</font><font size="2" face="Courier New">),</font><font size="3">
</font><font size="2" face="Courier New"><br>
$dbS : DBSubscription(
report == $event.report ) </font><font color="#a00000" size="2" face="Courier New"><b>from</b></font><font size="2" face="Courier New">
Processor.getUsers()</font><font size="3"> </font><font size="2" face="Courier New"><br>
</font><font color="#a00000" size="2" face="Courier New"><b>then</b></font><font size="3">
</font><font size="2" face="Courier New"><br>
list.add($dbS);
</font><font size="3"> </font><font size="2" face="sans-serif"><br>
<br>
Here processor.getUsers writtens me a list of DBSubscription, When I load
this package using </font><font size="2" face="Courier New"><br>
builder.addPackageFromDrl( source );</font><font size="3"> </font><font size="2" face="sans-serif"><br>
<br>
I get an error saying - </font><font color="red" size="2" face="Courier New"><br>
Exception in thread "main" </font><font color="#000080" size="2" face="Courier New"><u>org.drools.compiler.DroolsParserException</u></font><font color="red" size="2" face="Courier New">:
<b>Unknown error while parsing. This is a bug. Please contact the Development
team.</b></font><font size="3"> </font><font color="red" size="2" face="Courier New"><br>
at org.drools.compiler.DrlParser.compile(</font><font color="#000080" size="2" face="Courier New"><u>DrlParser.java:219</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
</font><font color="red" size="2" face="Courier New"><br>
at org.drools.compiler.DrlParser.parse(</font><font color="#000080" size="2" face="Courier New"><u>DrlParser.java:73</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
</font><font color="red" size="2" face="Courier New"><br>
at org.drools.compiler.DrlParser.parse(</font><font color="#000080" size="2" face="Courier New"><u>DrlParser.java:77</u></font><font color="red" size="2" face="Courier New">)</font><font size="3">
</font><font size="2" face="sans-serif"><br>
<br>
Would Appreciate any help on the same.</font><font size="3"> </font><font size="2" face="sans-serif"><br>
<br>
thanks</font><font size="3"> </font><font size="2" face="sans-serif"><br>
Shikha</font><font size="3"> </font>
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<br>
-- <br>
Edson Tirelli<br>
JBoss Drools Core Development<br></div></div>
JBoss, a division of Red Hat @ </font><a href="http://www.jboss.com/" target="_blank"><font color="blue" size="3"><u>www.jboss.com</u></font></a><font size="2"><tt>_______________________________________________<div class="Ih2E3d">
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This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you.
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<br></blockquote></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> JBoss Drools Core Development<br> JBoss, a division of Red Hat @ <a href="http://www.jboss.com">www.jboss.com</a><br>