Thank you both very much. I will try both suggestions, and will get back to you as soon as I've got it figured out :-)<br><br>Kind regards,<br><br>Aerv<br><br><div class="gmail_quote">2010/4/15 Robert <span dir="ltr"><<a href="mailto:robert.weissmann@web.de">robert.weissmann@web.de</a>></span><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi Aerv,<br>
<br>
soon I will also have to launch Drools within an OSGI environment, but I<br>
am not there yet. But within another context (jBPM) I had some troubles<br>
looking similar you are having.<br>
<br>
It had something to do with the classloading. jBPM did not provide any<br>
OSGI-support, whereas Droos does, so I am not sure if this fits, but I had<br>
to wrap here and there some classes so they got pulled in by the right<br>
ClassLoader (OSGI uses many class-loaders).<br>
<br>
<br>
final ClassLoader origCl =<br>
Thread.currentThread().getContextClassLoader();<br>
final ClassLoader cl =<br>
<YOUR_CLASS_YOU_WANT_TO_USE>.class.getClassLoader();<br>
Thread.currentThread().setContextClassLoader(cl);<br>
<br>
... use the class ...<br>
<br>
<br>
Thread.currentThread().setContextClassLoader(origCl);<br>
<br>
Maybe this helps,<br>
<br>
Cheers, Rob.<br>
<br>
<br>
Am 14.04.2010, 20:27 Uhr, schrieb Wouter Van Isterdael<br>
<<a href="mailto:woutervanisterdael@gmail.com">woutervanisterdael@gmail.com</a>>:<br>
<div class="im"><br>
> I still seem to be having problems getting it working. The problem did<br>
> not<br>
> go away.<br>
><br>
> I still get the same error. Would anyone know of a simple step-by-step<br>
> tutorial for using Drools in a Felix OSGi environment? Preferrably within<br>
> Eclipse and with Pax Runner.<br>
><br>
> Any help would be very much appreciated.<br>
><br>
> Thank you for your time!<br>
><br>
> Kind regards<br>
><br>
> Aerv<br>
><br>
> 2010/4/6 AervTerrh <<a href="mailto:woutervanisterdael@gmail.com">woutervanisterdael@gmail.com</a>><br>
><br>
>> Thanks for the reply. I will try this tomorrow and keep you posted!<br>
>><br>
>> 2010/4/5 Jason Davidson [via Drools - Java Rules Engine] <[hidden<br>
</div>>> email]<<a href="http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698969&i=0" target="_blank">http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698969&i=0</a>><br>
<div class="im">>> ><br>
>><br>
>>> I don't know if this helps, but I had to turn the MVEL JIT compiler<br>
>>> off in<br>
>>> the Equinox OSGi container:<br>
>>> OptimizerFactory.setDefaultOptimizer("reflective");<br>
>>><br>
>>> Also, we used pre-compiled packages instead of compiling the DRL files<br>
>>> at<br>
>>> runtime. For example:<br>
>>><br>
>>> ....<br>
>>> RuleBaseConfiguration ruleBaseConfig = new<br>
>>> RuleBaseConfiguration();<br>
>>><br>
>>> ruleBaseConfig.setClassLoader(this.getClass().getClassLoader());<br>
>>><br>
>>> //MVEL in OSGi is a complete CF - this turns off the MVEL<br>
>>> JIT<br>
>>> - potential resource hog but that's the nature of OSGi classloading<br>
>>> //and Drools...<br>
>>> OptimizerFactory.setDefaultOptimizer("reflective");<br>
>>><br>
>>> RuleBase ruleBase =<br>
>>> RuleBaseFactory.newRuleBase(ruleBaseConfig);<br>
>>><br>
>>> InputStream pkgIs =<br>
>>> this.getClass().getResourceAsStream("/com/cjs/hazel/rules/com.cjs.hazel.rules.pkg");<br>
>>> addPackage(ruleBase,pkgIs);<br>
>>> .....<br>
>>><br>
>>> On Fri, Apr 2, 2010 at 4:42 PM, AervTerrh <[hidden<br>
</div>>>> email]<<a href="http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698731&i=0" target="_blank">http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698731&i=0</a>><br>
<div><div></div><div class="h5">>>> > wrote:<br>
>>><br>
>>>><br>
>>>> Hey,<br>
>>>><br>
>>>> Okay. I know this problem can be found all over. But I can't seem to<br>
>>>> figure<br>
>>>> out a solution to it. Somehow I must be doing something wrong. I've<br>
>>>> created<br>
>>>> a simple application that evaluates some rules and changes some<br>
>>>> objects<br>
>>>> based on that. Everything worked fine, not a single problem there. All<br>
>>>> libraries could be easily found etc.<br>
>>>><br>
>>>> Now I wanted to convert this to a Felix OSGi bundle.<br>
>>>><br>
>>>> So, what I did, was creating a bundle (new plugin project based on<br>
>>>> existing<br>
>>>> jars) with the drools jars (core, compiler, api, jsr) and tried the<br>
>>>> next<br>
>>>> code in the RuleEngine class:<br>
>>>><br>
>>>> Properties props = new Properties();<br>
>>>> props.setProperty("drools.dialect.java.compiler", "JANINO");<br>
>>>> KnowledgeBuilderConfiguration config =<br>
>>>> KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(props, null);<br>
>>>> (here's where it fails)<br>
>>>> KnowledgeBuilder kbuilder =<br>
>>>> KnowledgeBuilderFactory.newKnowledgeBuilder(config);<br>
>>>> kbuilder.add(ResourceFactory.newClassPathResource(fileName,<br>
>>>> RuleEngine.class), ResourceType.DRL);<br>
>>>><br>
>>>> This is pretty much the loading of the rule file. The RuleEngine is<br>
>>>> started<br>
>>>> in an Activator. The file is found and everything. But I keep getting<br>
>>>> the<br>
>>>> same error when starting the bundle.<br>
>>>><br>
>>>> org.drools.RuntimeDroolsException: Unable to load dialect<br>
>>>> 'org.drools.rule.builder.dialect.mvel.MVELDialectConfigurati<br>
>>>> on:mvel:null'<br>
>>>> at org.drools.compiler.PackageBuilderConfiguration.addDialect(P<br>
>>>> ackageBuilderConfiguration.java:274)<br>
>>>> at org.drools.compiler.PackageBuilderConfiguration.buildDialect<br>
>>>> ConfigurationMap(PackageBuilderConfiguration.java:259)<br>
>>>> at org.drools.compiler.PackageBuilderConfiguration.init(Package<br>
>>>> BuilderConfiguration.java:176)<br>
>>>> at<br>
>>>><br>
>>>> org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:148)<br>
>>>> at org.drools.builder.impl.KnowledgeBuilderProviderImpl.newKnow<br>
>>>> ledgeBuilderConfiguration(KnowledgeBuilderProviderImpl.java: 21)<br>
>>>> at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuild<br>
>>>> erConfiguration(KnowledgeBuilderFactory.java:68)<br>
>>>> at test.Activator$RuleCreator.createRule(Activator.java:52)<br>
>>>> at test.Activator.start(Activator.java:32)<br>
>>>> at org.apache.felix.framework.util.SecureAction.startActivator(<br>
>>>> SecureAction.java:639)<br>
>>>> at org.apache.felix.framework.Felix.activateBundle(Felix.java:1 700)<br>
>>>> at org.apache.felix.framework.Felix.startBundle(Felix.java:1622 )<br>
>>>> at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.j<br>
>>>> ava:1077)<br>
>>>> at org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl<br>
>>>> .java:264)<br>
>>>> at java.lang.Thread.run(Unknown Source)<br>
>>>> Caused by: java.lang.ClassNotFoundException:<br>
>>>> org.drools.rule.builder.dialect.mvel.MVELDialectConfiguratio n<br>
>>>> at java.net.URLClassLoader$1.run(Unknown Source)<br>
>>>><br>
>>>><br>
>>>> The packages I import in the manifest:<br>
>>>> Import-Package: org.codehaus.janino;version="2.4.3",<br>
>>>> org.drools,<br>
>>>> org.drools.builder,<br>
>>>> org.drools.compiler,<br>
>>>> <a href="http://org.drools.io" target="_blank">org.drools.io</a>,<br>
>>>> org.drools.rule,<br>
>>>> org.drools.rule.builder.dialect.java,<br>
>>>> org.drools.rule.builder.dialect.mvel,<br>
>>>> org.osgi.framework;version="1.3.0"<br>
>>>><br>
>>>> In my target platform I add the the drools project I created (with<br>
>>>> drools-xx.jar (the necessary ones), I also added the following:<br>
>>>> -ant<br>
>>>> -antlr-runtime<br>
>>>> -janino<br>
>>>> -jsr94<br>
>>>> -xstream<br>
>>>><br>
>>>> But I can't seem to get it working... Does anyone know what can be<br>
>>>> done<br>
>>>> about this? Or a working example of Drools in Felix OSGi would also be<br>
>>>> helpful.<br>
>>>><br>
>>>> Any help is very much appreciated, I've been looking into this for<br>
>>>> days.<br>
>>>><br>
>>>> Thanks!<br>
>>>><br>
>>>> Kind regards,<br>
>>>><br>
>>>> Aerv<br>
>>>> --<br>
>>>> View this message in context:<br>
>>>> <a href="http://n3.nabble.com/Drools-and-OSGi-tp694011p694011.html" target="_blank">http://n3.nabble.com/Drools-and-OSGi-tp694011p694011.html</a><br>
>>>> Sent from the Drools - User mailing list archive at Nabble.com.<br>
>>>> _______________________________________________<br>
>>>> rules-users mailing list<br>
>>>> [hidden<br>
</div></div>>>>> email]<<a href="http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698731&i=1" target="_blank">http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698731&i=1</a>><br>
<div class="im">>>>><br>
>>>> <a href="https://lists.jboss.org/mailman/listinfo/rules-users" target="_blank">https://lists.jboss.org/mailman/listinfo/rules-users</a><br>
>>>><br>
>>><br>
>>><br>
>>> _______________________________________________<br>
>>> rules-users mailing list<br>
>>> [hidden<br>
</div>>>> email]<<a href="http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698731&i=2" target="_blank">http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698731&i=2</a>><br>
<div class="im">>>> <a href="https://lists.jboss.org/mailman/listinfo/rules-users" target="_blank">https://lists.jboss.org/mailman/listinfo/rules-users</a><br>
>>><br>
>><br>
>><br>
>><br>
>> --<br>
>> __________________________________<br>
>> Van Isterdael Wouter<br>
>> Roesbeke 27<br>
>> 9402 Meerbeke<br>
>> 0496401476<br>
>><br>
>> ------------------------------<br>
>> View this message in context: Re: Drools and<br>
</div>>> OSGi<<a href="http://n3.nabble.com/Drools-and-OSGi-tp694011p698969.html" target="_blank">http://n3.nabble.com/Drools-and-OSGi-tp694011p698969.html</a>><br>
<div class="im">>><br>
>> Sent from the Drools - User mailing list<br>
</div>>> archive<<a href="http://n3.nabble.com/Drools-User-f47000.html" target="_blank">http://n3.nabble.com/Drools-User-f47000.html</a>>at Nabble.com.<br>
<div class="im">>><br>
>> _______________________________________________<br>
>> rules-users mailing list<br>
>> <a href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a><br>
>> <a href="https://lists.jboss.org/mailman/listinfo/rules-users" target="_blank">https://lists.jboss.org/mailman/listinfo/rules-users</a><br>
>><br>
>><br>
><br>
><br>
<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>__________________________________<br>Van Isterdael Wouter<br>Roesbeke 27<br>9402 Meerbeke<br>0496401476<br>