db4o Developer Community

Is there an ObjectManager to work with the 7.3 dev build? I tried OM 6.4 but it gave the very informative message: "Could not open database! 3" and I couldn't find anything at all that referred to what that error might mean.

Assuming it was a version compatibility problem, I downloaded OM X.x, even though that contains what appears to be version 6.4. That, too, failed to open the database with the same error.

Then I noticed that the download page said to substitute the dbo-X.x-java5.jar file from the database version you're using so I tried downloading db4o 7.3 for java and replacing the -java5.jar file and got this:

Exception in thread "main" java.lang.NoClassDefFoundError: com/db4o/DatabaseFileLockedException
Caused by: java.lang.ClassNotFoundException: com.db4o.DatabaseFileLockedException
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)

 So, now I'm at a loss as to what to try next.

 Is there a way to use ObjectManager with the 7.3 build of db4o for .NET?

Thanks,
Doug Harber

Hi Doug, 

as stated on the download page: 

"Starting with Version 7.0 there is a commercial-only version, ObjectManager Enterprise"

Maybe you should start to test OME...

Cheers, Maik 

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http://db4o.blogspot.com/

I took that to mean that OME was available as of version 7.0 and was commercial-only. It didn't strike me as saying that non-Enterprise version of OM was no longer available.

Did I misread that, then?

Thanks,
Doug Harber

...and I just downloaded OME 7.0 and attempted to install it and was rewarded with "The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2869."

Doug Harber

Here's the newsletter about the OME announcement... OM is declarded as community project, altough I'm not sure if anyone has taken the project:

http://db4o.com/about/news/newsletter/2007_12.aspx

Sorry, I'm no big help here, 'cause I've never used OM(E)...

Cheers, Maik
 

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http://db4o.blogspot.com/

I everyone, one of the first priorities for the OM project was add support for read ecnrypted databases, (you can find the first preview in http://code.google.com/p/db4o-om/), for this reason the project is not updated to support new versions of db4o engine, you can check the progress of OM (or participate as a developer) through the Google Code site and you can also subscribe to the OM commit mailing list here.

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salu2 desde Ecuador
Gisbert Avellan

That's how I read it too. I never took the meaning that ObjectManager is no longer available for 7.0 and I'd be stuck without it.

I also hope someone gets a bit more professional about those error messages, the number '3' was a nice touch. I'll log that with someone who keeps a list of the worse error messages in software.

Hi

I just try to install "ObjectManager Enterprise for Visual Studio" and the install do rollback, Error 2869. I search in this forum for 2869 and find only your post of this one. Im running Vista Ultimate.

thanks /Qazz