db4o Developer Community

Hello. I have some problem with db file.I'm using db4o in my application written in Java.User which uses it broke db file. I know that he updated application (replaced .jar file).New version of app has the same version db4o and the same settings.What was the immediate cause of this problem I don't know. But I have assumption, that he replaced .jar ...

Hi All I have an Java server and a .net client:  Connecting works fine, but when I try to save an object and open the file with the Objectmanager, I can see no stored objects. What is wrong with my code? Please support me in solving the issue,am struggling for quite a long time now :)...  Server: import java.io.*;import ...

Hi ,    I seem to have about the same problem, i have tried a variety of options but problem remains. I use Eclipse 3.4, JDK 6 update 10 . I have a db4o server running in my linux-based (OpenSuse) pc listening to a specific port. At first i access it through a client i have built using eclipse from my laptop. Operations seem to be working ...

I wondered if I should worry about this message that appeared during defragmentation (after closing and re-opening a database file with a db4o server application):14-Nov-2008 16:31:02 database.Db4oServer$DefragErrorListener notifyDefragmentInfoWARNING: Db4o Defragmentation Incident: No mapping found for ID 6523914-Nov-2008 16:31:02 ...

BilderHerunterlader is a Java software which makes it easier to download hosted images. It's open source (GPL v2) and currently using the following libraries: jtidy, JDom, db4o, log4j, Jakarta-Httpclient, BrowserLauncher, SwingX, ini4j, sqlitejdbc, GUITools, FileIOTools (review, download)

ObjectManager Enterprise 7.7 plug-in for Java/Eclipse Compatible with db4o-7.7

32 MB

No I'm not upgrading Db4o.  I'm remaining at 6.4.  I'm upgrading my application from version 1.0 to version 2.0 (for example), and the object schemas between 1.0 and 2.0 are different.  I'd like to migrate that data from the old object schema to my new object schema.  If I could open up these objects as GenericObjects then I can do the code to ...

Join Jim Cassidy in his effort to use db4o together with Jython. He suggests an an Active Record like wrapper around db4o. Stay tuned to his blog for upcoming db4o samples implemented in Jython.

I have a DB that I want to upgrade, but it looks like the normal route of using rename, and friends won't work because my DB is old.  I'm using 6.4.  I also have several changes that the existing upgrade process won't work for.  So I'm thinking I could open up the DB and use StoredClass and friends to move the data into my current object model and ...