Hi, I have a question about boot delegation in Equinox. My feeling is that it
is not working according to the spec.
The spec says:
If the class or resource is from a package included in the boot delegation list
(org.osgi.framework.bootdelegation), then the request is delegated to the
parent class loader. If the class or resource is found there, the search ends.
My test client uses a class that it does not import. According to the spec it
is not necessary, since the fw has to delegate all packages to the parent class
loader if the package is listed in org.osgi.framework.bootdelegation.
At runtime, it fails to load the APIClass.
test client:
package com.tibco.osgi.bootdelegation;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import com.tibco.osgi.bd.api.APIClass;
/**
* @author timd
*
*/
public class BootdelegationTest implements BundleActivator{
@Override
public void start(BundleContext context) throws Exception {
System.out.println(APIClass.getMessage());
}
@Override
public void stop(BundleContext context) throws Exception {
// TODO Auto-generated method stub
}
}
Manifest.mf (not importing the package!)
Bundle headers:
Bundle-Activator = com.tibco.osgi.bootdelegation.BootdelegationTest
Bundle-ManifestVersion = 2
Bundle-Name = Bootdelegation
Bundle-RequiredExecutionEnvironment = JavaSE-1.6
Bundle-SymbolicName = com.tibco.osgi.bootdelegation
Bundle-Version = 1.0.0.201104181155
Import-Package = org.osgi.framework;version="1.6.0"
Manifest-Version = 1.0
test provider:
package com.tibco.osgi.bd.api;
/**
* @author <a href="mailto:[email protected]";>Tim Diekmann</a>
*
* @since
*/
public class APIClass {
public static String getMessage() {
return "This is from the system class loader";
}
}
Command line:
java -classpath
org.eclipse.osgi_3.7.0.v20110304.jar:com.tibco.osgi.bd.api_1.0.0.201104181140.jar
-Dorg.osgi.framework.bootdelegation=com.tibco.osgi.bd.*
org.eclipse.core.runtime.adaptor
.EclipseStarter -console
Result:
java.lang.NoClassDefFoundError: com/tibco/osgi/bd/api/APIClass
at
com.tibco.osgi.bootdelegation.BootdelegationTest.start(BootdelegationTest.java:16)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
Configuration:
Equinox
org.eclipse.osgi_3.7.0.v20110304
Java:
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07-334-10M3326)
Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02-334, mixed mode)
Any suggestions what I am missing here?
I also tried the variant on the command line to change the parent class loader
of the bundle class loaders to app and framework. No change. Adding the package
to org.osgi.framework.system.packages.extra did not help either.
java -classpath
org.eclipse.osgi_3.7.0.v20110304.jar:com.tibco.osgi.bd.api_1.0.0.201104181140.jar
-Dorg.osgi.framework.bootdelegation=com.tibco.osgi.bd.*
-Dorg.osgi.framework.bundle.pare
nt=app -Dorg.osgi.framework.system.packages.extra=com.tibco.osgi.bd.api
org.eclipse.core.runtime.adaptor.EclipseStarter -console
Thanks,
Tim.
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