<div>When you run from command prompt, make sure the classloader can find the class definition of <font size="2" face="Trebuchet MS">org.drools.rule.builder.dialect.java.JavaDialectConfiguration.<br><br>FYI:<br>RuleBaseConfiguration.java<br> if ( classLoader != null ) {<br> this.classLoader = classLoader;<br> } else if ( Thread.currentThread().getContextClassLoader() != null ) {<br> this.classLoader = Thread.currentThread().getContextClassLoader();<br> } else {<br> this.classLoader = this.getClass().getClassLoader();<br> }<br></font><br></div><div></div><br>在2009-07-21，Pankaj.Jain@lntinfotech.com 写道：<br> <blockquote id="isReplyContent" style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;"><br><font size="2" face="Trebuchet MS">Hi</font>
<br>
<br><font size="2" face="Trebuchet MS">I Have put all the required jar files
including </font><font size="3" face="sans-serif">eclipse's core-3.4.2.v_883_R34x.jar.</font><font size="2" face="Trebuchet MS">
Without overriding the "setCompiler" method code runs perfectly
from eclipse but gives exception when try to run from command prompt</font>
<br>
<br><font size="2" face="Trebuchet MS">Thanks & Regards:<br>
<br>
Pankaj Jain | L&T infotech |Navi Mumbai<br>
Mobile: +91 9920218945<br>
Email : <a href="mailto:pankaj.jain@lntinfotech.com">pankaj.jain@lntinfotech.com</a><br>
www.Lntinfotech.com<br>
<br>
"Whatever the mind of man can conceive & believe, it can achieve."<br>
<b><br>
Larsen & Toubro Infotech Ltd.</b></font><font color="blue" size="2" face="Trebuchet MS"><u><br>
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<br><font size="1" face="Trebuchet MS">Sent by: <a href="mailto:rules-users-bounces@lists.jboss.org">rules-users-bounces@lists.jboss.org</a></font>
<p><font size="1" face="Trebuchet MS">07/21/2009 09:42 AM</font>
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<div align="right"><font size="1" face="Trebuchet MS">Subject</font></div>
</td><td><font size="1" face="Trebuchet MS">Re: [rules-users] Problem : Run Drool
Application From Command Prompt</font></td></tr></tbody></table>
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<br>
<br><font size="3" face="sans-serif">I think that you need to put java compiler
to your classpath.<br>
try eclipse's core-3.4.2.v_883_R34x.jar.</font>
<br>
<br><font size="3" face="sans-serif"><br>
在2009-07-21，<a href="mailto:Pankaj.Jain@lntinfotech.com">Pankaj.Jain@lntinfotech.com</a> 写道：</font>
<br><font size="2" face="Trebuchet MS"><br>
Hi</font><font size="3" face="sans-serif"> <br>
</font><font size="2" face="Trebuchet MS"><br>
I am trying to integrate Drool with ofbiz and run application from command
prompt. In one way I have integrated it properly and I am able to run it
<b>successfully.</b></font><font size="3" face="sans-serif"> <br>
</font><font size="2" face="Trebuchet MS"><b><br>
Code :</b> Which I was using initially</font><font size="3" face="sans-serif">
<br>
</font><font size="2" face="Trebuchet MS"><br>
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
</font><font size="3" face="sans-serif"><br>
</font><font size="2" face="Trebuchet MS"><br>
or</font><font size="3" face="sans-serif"> <br>
</font><font size="2" face="Trebuchet MS"><br>
PackageBuilderConfiguration cfg = new PackageBuilderConfiguration();</font><font size="3" face="sans-serif">
</font><font size="2" face="Trebuchet MS"><br>
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
</font><font size="3" face="sans-serif"><br>
</font><font size="2" face="Trebuchet MS"><b><br>
Exception I got :</b></font><font size="3" face="sans-serif"> <br>
</font><font size="2" face="Trebuchet MS"><br>
org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java
<br>
:org.drools.rule.builder.dialect.java.JavaDialectConfiguration'</font><font size="3" face="sans-serif">
</font><font size="2" face="Trebuchet MS"><br>
at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:274)
at org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:259)
</font><font size="3" face="sans-serif"><br>
</font><font size="2" face="Trebuchet MS"><br>
at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:176)
at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:153)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:242)
<br>
.</font><font size="3" face="sans-serif"> </font><font size="2" face="Trebuchet MS"><br>
.</font><font size="3" face="sans-serif"> </font><font size="2" face="Trebuchet MS"><br>
.</font><font size="3" face="sans-serif"> </font><font size="2" face="Trebuchet MS"><br>
Caused by: java.lang.NullPointerException</font><font size="3" face="sans-serif">
</font><font size="2" face="Trebuchet MS"><br>
at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setCompiler(JavaDialectConfiguration.java:92)
at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(JavaDialectConfiguration.java:55)
at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:270</font><font size="3" face="sans-serif">
<br>
</font><font size="2" face="Trebuchet MS"><b><br>
Problem I found : </b><br>
In the class JavaDialectConfiguration in jar file drools-compiler.jar there
is a method named "setCompliler", in this method Null Pointer
Exception was coming.</font><font size="3" face="sans-serif"> <br>
</font><font size="2" face="Trebuchet MS"><b><br>
Solution I provided :</b></font><font size="3" face="sans-serif"> </font><font size="2" face="Trebuchet MS"><br>
In my application I created my custom class CustomJavaDialectConfiguration
by extending to class JavaDialectConfiguration, In this class I overrided
the method setCompiler. My method was exactly same as that of method setCompiler
in JavaDialectConfiguration . To call my dialect class I also overrided
the method "addDialect" of PackageBuilderConfiguration class
. For that I created class CustomPackageBuilderConfiguration by extending
to PackageBuilderConfiguration. <br>
after that I wrote the code:</font><font size="3" face="sans-serif"> <br>
</font><font size="2" face="Trebuchet MS"><br>
PackageBuilderConfiguration cfg = new CustomPackageBuilderConfiguration();</font><font size="3" face="sans-serif">
</font><font size="2" face="Trebuchet MS"><br>
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(cfg);</font><font size="3" face="sans-serif">
<br>
<br>
</font><font size="2" face="Trebuchet MS"><br>
Now application is running perfectly fine from both eclipse and command
prompt without any exception.</font><font size="3" face="sans-serif"> <br>
</font><font size="2" face="Trebuchet MS"><b><br>
I want to know as my overrided method "setCompiler" was exactly
same then why I had to override method, and In original code (ie in drools-compiler.jar
file) why it was giving exception ??? Was that due to class
lader or something else ?? Please do help in this regard ....</b></font><font size="3" face="sans-serif">
<br>
</font><font size="2" face="Trebuchet MS"><br>
Thanks & Regards:<br>
<br>
Pankaj Jain | L&T infotech |Navi Mumbai<br>
Mobile: +91 9920218945<br>
Email : </font><a href="mailto:pankaj.jain@lntinfotech.com"><font color="blue" size="2" face="Trebuchet MS"><u>pankaj.jain@lntinfotech.com</u></font></a><font size="2" face="Trebuchet MS"><br>
www.Lntinfotech.com<br>
<br>
"Whatever the mind of man can conceive & believe, it can achieve."<b><br>
<br>
Larsen & Toubro Infotech Ltd.</b></font><font color="blue" size="3" face="sans-serif"><u><br>
</u></font><a href="http://www.lntinfotech.com"><font color="blue" size="2" face="Trebuchet MS"><u>www.Lntinfotech.com</u></font></a><font size="2" face="Trebuchet MS"><br>
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