Re: RE : OJB and RMI

[Bradford Pielech]

Tom:
        Thanks for all your help.  Sometimes a fresh set of eyes can 
really help.  The problem was a misspelled path on the OJB.properties location.

        Now you can get back to your usual task of helping solve real OJB 
problems.

thanks again.
Brad
At 06:31 PM 6/15/2004 +0200, you wrote:
Bradford Pielech wrote:
Tom:
        Thanks for the pointer, but it still isn't working.  Here is 
some sample code inside the RMI server that illustrates the failure:

      String s = 
RMIClassLoader.getClassAnnotation(PersistenceBrokerFactory.class);
      ClassLoader cl = RMIClassLoader.getClassLoader(s);
      org.apache.ojb.broker.util.ClassHelper.setClassLoader(cl);
      PersistenceBroker pbroker = 
PersistenceBrokerFactory.defaultPersistenceBroker();
      System.out.println("PBroker: " + pbroker.toString());

This produces the error:
-------
[BOOT] ERROR: Creation of PersistenceBrokerFactory (PBF) instance failed, 
can't get PBF class object
------

Any other ideas?
Hmm, I'm by no means an RMI expert (at least in environments where 
performance is not an issue, I'd rather use XML-RPC), but I wonder whether 
the RMI classloader is correctly initialized to find OJB classes, or 
whether OJB is correctly configured.
Have a look into your OJB.properties file to see what the persistence 
broker factory class is that would used (property 
PersistenceBrokerFactoryClass). If this property is not defined, then the 
above error results (there is no default value for this property). If it 
is defined, then either the OJB.properties file could not be loaded (you 
should see this in the same log where the above error message was output), 
or the class could not be loaded.
In the first case, the OJB.properties file could probably not loaded (you 
can set its path manually using the system property "OJB.properties" prior 
to using *any* OJB class).
In the latter case, please try to load the class directly using the RMI 
classloader:

Class.forName(classname, true, cl);
and see what happens then.
Tom
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