[rules-users] Run Drool Application From Command Prompt

[Nicolas Héron]

Hello,
did you set the java compiler name : "JANINO" or "JAVA" ?

2009/7/28 <Pankaj.Jain at lntinfotech.com>

>
> Hi
>
> I still have not got any solution of my problem that I posted previously. I
> have included all required jar files and set proper class path .. Please do
> help ?
>
> problem:
>  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 *successfully.*
> *
> Code :* Which I was using initially
>
> KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
>
> or
>
> PackageBuilderConfiguration cfg = new PackageBuilderConfiguration();
> KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
> *
> Exception I got :*
>
> org.drools.RuntimeDroolsException: Unable to load dialect
> 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java
> :org.drools.rule.builder.dialect.java.JavaDialectConfiguration'
> at
> org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:274)
> at
> org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:259)
>
>
> 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)
> .
> .
> .
> Caused by: java.lang.NullPointerException
> 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
> *
> Problem I found : *
> In the class JavaDialectConfiguration in jar file drools-compiler.jar there
> is a method named "setCompliler",  in this method Null Pointer Exception was
> coming.
> *
> Solution I provided :*
> 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.
> after that I wrote the code:
>
> PackageBuilderConfiguration cfg = new CustomPackageBuilderConfiguration();
> KnowledgeBuilder kbuilder =
> KnowledgeBuilderFactory.newKnowledgeBuilder(cfg);
>
>
> Now application is running perfectly fine from both eclipse and command
> prompt without any exception.
> *
> 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 ....*
>
>
>
> Thanks & Regards:
>
> Pankaj Jain | L&T infotech |Navi Mumbai
> Mobile: +91 9920218945
> Email : pankaj.jain at lntinfotech.com
> www.Lntinfotech.com
>
> "Whatever the mind of man can conceive & believe, it can achieve."
> *
> Larsen & Toubro Infotech Ltd.**
> **www.Lntinfotech.com* <http://www.lntinfotech.com/>
>
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>
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