[rules-users] Drools examples don't run

[赵侃侃]

Thanks Bruno,

I have now fixed the NoClassDefFoundError, any ideas about the NullPointer
one?

Best Regards,
Kevin Zhao

2010/10/20 Bruno Freudensprung <bruno.freudensprung at temis.com>

>
> Hello,
>
> I think you have to add the xstream jar to your classpath.
> Here is the Maven dependency :
>
>     <dependency>
>       <groupId>com.thoughtworks.xstream</groupId>
>       <artifactId>xstream</artifactId>
>       <version>1.3.1</version>
>     </dependency>
>
> Best regards,
>
> Bruno.
>
>
> 赵侃侃 a écrit :
>
> Hello,
>
>  I checked out the latest source from svn repository. It compiled OK and
> imported the example projects to my eclipse workspace but the examples run
> with error.
> The two example projects are namely drools-examples-drl
> & drools-examples-fusion.
>
>  org.drools.examples.pacman.Main gives the errors:
>
>  Exception in thread "main" java.lang.NoClassDefFoundError:
> com/thoughtworks/xstream/XStream
>  at
> org.drools.audit.KnowledgeRuntimeLoggerProviderImpl.newThreadedFileLogger(KnowledgeRuntimeLoggerProviderImpl.java:34)
>  at
> org.drools.logger.KnowledgeRuntimeLoggerFactory.newThreadedFileLogger(KnowledgeRuntimeLoggerFactory.java:69)
>  at org.drools.examples.pacman.Main.initKsession(Main.java:88)
>  at org.drools.examples.pacman.Main.main(Main.java:39)
> Caused by: java.lang.ClassNotFoundException:
> com.thoughtworks.xstream.XStream
>  at java.net.URLClassLoader$1.run(Unknown Source)
>  at java.security.AccessController.doPrivileged(Native Method)
>  at java.net.URLClassLoader.findClass(Unknown Source)
>  at java.lang.ClassLoader.loadClass(Unknown Source)
>  at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
>  at java.lang.ClassLoader.loadClass(Unknown Source)
>  ... 4 more
>
>
>  org.drools.examples.broker.Main gives the errors:
>
>  java.lang.NullPointerException
>  at
> org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:432)
>  at
> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:468)
>  at
> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
>  at org.drools.examples.broker.Broker.loadRuleBase(Broker.java:95)
>  at org.drools.examples.broker.Broker.createSession(Broker.java:80)
>  at org.drools.examples.broker.Broker.<init>(Broker.java:57)
>  at org.drools.examples.broker.Main.main(Main.java:53)
>
>  Does anyone experience the similar issues and know how to fix that?
>
>  Best Regards,
> Kevin
>
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