[rules-users] execution using "java -jar x.jar ..." fails

[Edson Tirelli]

   LOL, that is why AntlrWorks never finds my user defined classes! :) I
guess it is a good thing we can learn new things every single day.

   Thanks Giovanni.
        Edson

2010/6/23 Giovanni Motta <mottagio at gmail.com>

> When you launch with -jar, the classpath is ignored and the jar content is
> used only.
> See -jar documentation:
> "When you use this option, the JAR file is the source of all user classes,
> and other user class path settings are ignored."
>
> regards
>
> 2010/6/23 Wolfgang Laun <wolfgang.laun at gmail.com>
>
>> The application works fine in Eclipse.
>>
>> In Eclipse, I created a jar file x.jar from the .class and a few .drl
>> files, and copied x.jar to /tmp/x/
>>
>> Now, in /tmp/x
>>    CP="droos/*:drools/lib/*"
>>    java -cp "$CP" -jar dpvt.jar par...
>> This fails on the first attempt to access any class from a drools jar
>> file.
>>
>> In /tmp/x, I unpack x.jar and call
>>    CP="droos/*:drools/lib/*:."
>>    java -cp "$CP" rss.aws.init.Main par...
>> AND THIS WORKS!
>>
>> So, what is different when starting a Java program with java -jar as
>> opposed
>> to java x.y.Main?
>>
>> The stack dump is not very informative:
>>
>> java.lang.NoClassDefFoundError: org/drools/KnowledgeBaseFactory
>>     at rss.aws.engine.impl.DroolsEngine.setup(DroolsEngine.java:30)
>>     at rss.aws.init.Core.init(Core.java:51)
>>     at rss.aws.init.Core.getInstance(Core.java:16)
>>     at rss.aws.init.Main.<init>(Main.java:35)
>>     at rss.aws.init.Main.main(Main.java:191)
>> Caused by: java.lang.ClassNotFoundException:
>> org.drools.KnowledgeBaseFactory
>>     at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
>>     at java.security.AccessController.doPrivileged(Native Method)
>>     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
>>     at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
>>     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
>>     at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
>>     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332)
>>     ... 5 more
>>
>>  Any ideas?
>> -W
>>
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>>
>>
>
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-- 
 Edson Tirelli
 JBoss Drools Core Development
 JBoss by Red Hat @ www.jboss.com
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