Re: Using a Java Space from an OSGi bundle

Harald

Check out the Newton open source project (www.codecauldron.org) there is an
example of Blitz running in an OSGi framework in a scenario similar to you
have described.

Newton is the foundation elements of the commercial Paremus Infiniflow
product, of which there is a free commercial evaluation available. You can
find out further details at http://www.paremus.com/downloads/downloads.html.
[Blatent plug over]

If you have any questions please do not hesitate to contact me.

Regards
Mike

-----Original Message-----
From: Wellmann, Harald [mailto:[email protected]]
Sent: 13 September 2007 14:58
To: [email protected]
Subject: Using a Java Space from an OSGi bundle

I'm having a classloader issue when using a JavaSpace from within an
OSGi bundle.

(My JavaSpace is Blitz from the IncaX 4.1 community edition my OSGi
environment is Eclipse 3.2, running under JDK 6.0).

The JavaSpace and the OSGi bundle are running in separate VMs. I can
write an entry to the space from my OSGi bundle, but when trying to take
the entry I've just written:

13.09.2007 14:54:36 org.dancres.blitz.mangler.EntryMangler unMangle
SCHWERWIEGEND: Error during unpack:
java.lang.ClassNotFoundException:
com.harmanbecker.anaconda.job.space.MaxJobIdEntry
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:247)
        at
sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:434)
        at
sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:165)
        at
java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:620)
        at
java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:247)
        at net.jini.loader.ClassLoading.loadClass(ClassLoading.java:138)
        at
org.dancres.blitz.mangler.EntryMangler.unMangle(EntryMangler.java:86)
        at org.dancres.blitz.remote.BlitzProxy.take(BlitzProxy.java:117)
        at
com.harmanbecker.anaconda.job.test.ReadAndTake.run(ReadAndTake.java:30)
        at
com.harmanbecker.anaconda.main.Activator.run(Activator.java:106)
        at java.lang.Thread.run(Thread.java:619)

How do I ensure that the JavaSpace proxy (loaded via RMI) can load the
classes exported by my bundle?

By the way, I'm surprised that I could load the RMI proxy at all, as my
bundle has no declared dependency on Blitz.

Regards,

Harald Wellmann

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