[rules-users] Drools examples don't run

[Michael Anstis]

Your stack trace shows:-

at
org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:432)

So a process is being built from associated XML!

If I get time I'll have a look at the example (when I'm at home later). I
don't recall anything being copied anywhere as they're normally picked up
directly from the classpath.

2010/10/21 赵侃侃 <kevin223 at gmail.com>

> No, the NPE is all I've got in the console output.
>
> Can you detail what process definition that you are referring to? I saw all
> the rules definition files are all copied over to the classpath after
> conducting the compile.
>
> Namely, those files are borker.drl, notify.drl, position.drl, position.rf
> and stocktickstream.dat. All of them now exist under
> project-root/target/classes
>
> Best Regards,
> Kevin Zhao
>
>
> 2010/10/21 Michael Anstis <michael.anstis at gmail.com>
>
>> Are there any errors in addition to the NPE?
>>
>> The context of the stack-trace suggests the process definition being
>> loaded is not on your classpath.
>>
>> 2010/10/21 赵侃侃 <kevin223 at gmail.com>
>>
>> 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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