[rules-users] Drools examples don't run

[赵侃侃]

Thanks Michael, I couldn't find any XML files under the example project. It
will be a great help if you can take a look at yours when you have time.

Best Regards,
Kevin Zhao

2010/10/21 Michael Anstis <michael.anstis at gmail.com>

> 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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