Hi guys
I send this to you since this seems like a more technical issue than the felix
user mailing list can help me with.
I am wrapping an existing osgi application that was running with equinoix into
a j2ee application that runs on Weblogic. After a few issues, the application
deploys and run totally fine.
I can access it sockets and connect the client to it without issues.
But when it comes to accessing the app using the OSGI Services, I can call a
few methods. However, as soon as I call a method on a service that has non
Java-Datatypes, I get LinkageErrors, like this one:
java.lang.LinkageError: loader constraint violation: loader (instance of
org/apache/felix/framework/BundleWiringImpl$BundleClassLoaderJava5) previously
initiated loading for a different type with name
"com/kuka/nav/robot/MobileRobotType"
at
com.kuka.nav.fleet.simulation.internal.FleetSimulationImpl.addRobot(FleetSimulationImpl.java:137)
at
com.kuka.nav.fleet.simulation.internal.FleetSimulationImpl.addRobot(FleetSimulationImpl.java:177)
at com.swisslog.wm6.test.MoveServlet.processRequest(MoveServlet.java:71)
at com.swisslog.wm6.test.MoveServlet.doGet(MoveServlet.java:95)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
What I try to achieve is:
69: IResourceManager resMan = getService(IResourceManager.class);
70: FleetSimulation simulation = (FleetSimulation)
resMan.getResource("FleetSimulation").getCapability(FleetSimulation.class);
71: simulation.addRobot(new BasicRobotType(7), "Robotinator");
72: simulation.startAllRobots();
As you can see, the type to pass to addRobot is of BasicRobotType.
We tried with a different method, that instead of a BasicRobotType takes a
regular integer instead:
69: IResourceManager resMan = getService(IResourceManager.class);
70: FleetSimulation simulation = (FleetSimulation)
resMan.getResource("FleetSimulation").getCapability(FleetSimulation.class);
71: simulation.addRobot(7, "Robotinator");
72: simulation.startAllRobots();
This works fine then. But this also means we would have to change the API
significantly and to a low level API who nobody likes.
Information about the classes:
public interface MobileRobotType
public final class BasicRobotType implements MobileRobotType The java classes
are in a single jar file and are not duplicated on the classpath.
@Resource(lookup = "java:app/osgi/Bundle") Bundle activatorBundle;
public <T> T getService(Class<T> serviceInterface) {
return activatorBundle.getBundleContext()
.getService(activatorBundle.getBundleContext().getServiceReference(serviceInterface));
}
Any idea what can be done to solve the linkage error? Maybe any Devs out there
of felix itself?
Thanks
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