[rules-users] Drools 4.0.7 OSGi version not working

[Faron Dutton]

Hi Flavius,

This is just a guess...

com.springsource.org.drools.compiler is attempting to use an 'internal'
package from the JDT, which is not exported. Other OSGi containers (like
Spring) may choose to expose not-exported packages in the class loader but
Equinox (as of version 3.3) does not.

When running in Spring, com.springsource.org.apache.jasper.org.eclipse.jdt
provides the JDT packages, which may or may not export the internal ones.
Normally, for Eclipse, org.eclipse.jdt provides these packages and it
definitely does not export the internal packages. When more than one bundle
exports the same package, OSGi selects one bundle to supply the package and
ignores all other bundles. Which bundle the OSGi container selects is not
specified (i.e., there is no priority) and OSGi does not merge the contents
of all bundles into a single, logical package.

It appears that Equinox is selecting org.eclipse.jdt and ignoring
com.springsource.org.apache.jasper.org.eclipse.jdt. I seem to remember that
you can instruct Eclipse to revert to the pre-v3.3 behavior with a
command-line parameter (add it to your eclipse.ini file) but I do not
remember the details.

Hope this helps,
Faron.

BTW, this question would be more appropriate for the Equinox user list.



> -----Original Message-----
> From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
> bounces at lists.jboss.org] On Behalf Of Flavius Vespasianus
> Sent: Thursday, July 02, 2009 6:07 PM
> To: Rules Users List
> Subject: [rules-users] Drools 4.0.7 OSGi version not working
> 
> Hi,
> 
> I am still trying to setup Drools as OSGi classes. I have downloaded
> and
> installed following plugins:
> 
> com.springsource.com.thoughtworks.xstream-1.3.0.jar
> com.springsource.javax.rules-1.1.0.jar
> com.springsource.javax.xml.stream-1.0.1.jar
> com.springsource.jxl-2.6.6.jar
> com.springsource.org.apache.jasper.org.eclipse.jdt-6.0.16.jar
> com.springsource.org.codehaus.janino-2.5.15.jar
> com.springsource.org.drools.compiler-4.0.7.jar
> com.springsource.org.drools.decisiontable-4.0.7.jar
> com.springsource.org.drools.jsr94-4.0.7.jar
> com.springsource.org.drools-4.0.7.jar
> com.springsource.org.mvel-1.3.5.jar
> com.springsource.org.xmlpull-1.1.3.4-O.jar
> com.springsource.org.xmlpull-1.1.4.jar
> 
> But when I try to run it, it still says:
> 
> Bundle update at plugins/com.springsource.org.drools.compiler-4.0.7.jar
> was
> not resolved.
> Missing imported package
> org.eclipse.jdt.internal.compiler.classfmt_[3.2.3,4.0.0).
> Missing imported package org.eclipse.jdt.core.compiler_[3.2.3,4.0.0).
> Missing imported package
> org.eclipse.jdt.internal.compiler.problem_[3.2.3,4.0.0).
> Missing imported package
> org.eclipse.jdt.internal.compiler.env_[3.2.3,4.0.0).
> Missing imported package
> org.eclipse.jdt.internal.compiler_[3.2.3,4.0.0).
> 
> That's weird - the packages are in org.eclipse.jdt.core plugin and I
> have the version 3.3.3, so it should find it. I have tried it also with
> version 3.2.3 and 3.4.2 but no success. The target platform should be
> configured correctly even when I try to use two versions at the same
> moment it complains.
> 
> Can anybody help me, please? I am running out of time for my thesis...
> 
> Flavius
> 
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