db4o Developer Community

db4o open source object database, native to Java and .NET

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Welcome to the world's largest user community for object database technology!

Learn, contribute, and enjoy your exchange with more than 45,000 registered peers, who want to bring object oriented programming to the next level - the database - and leave the era of the object-relational mismatch, tedious O/R mappers and roll-your-own-databases behind them! Join the developer community now - it's fast, easy, and free.

In the Community

		db4o gains support of Versant Co...
		Today it's an exciting day for db4o! Versant Corporation (Nasdaq: VSNT ), the leading commercial ODBMS company and provider of specialized data management software, acquired the db4objects' database business of privately-held Servo Software, Inc. (formerly...

db4o Projects Spotlight

	sql4o 1.1.0 released
	Now 1.1.0 is also released, allowing sql4o to be used with JDKs using JDBC4 (i.e JDK1.6+)

Product News

7.4 - Release Notes

Now is the time for the newer and better Stable version - 7.4 . As usual it is available in download center and recommended for …

New db4o library structure in db4o 7.7

The db4o core engine used to get built to one big fat .jar/.dll. From our users on low resource devices we constantly hear …

Changes in Db4o Configuration API

Hi. Recently we introduced some changes to our configuration APIs striving for simplicity. You can read more about these changes …

Fast Reflection for .Net

Hi, Recently we decided to evaluate how much impact (in performance) reflection represented in db4o. In .Net side we already knew …

Sharpen your Java app now: Java to C# converter released as free software

As of today, db4objects releases its Eclipse based Java to C# source code conversion tool "sharpen" as free software. sharpen is …

Recent Activity

db4o gains support of Versant Corporation,...

Today it's an exciting day for db4o! Versant Corporation (Nasdaq: VSNT ), the leading commercial ODBMS company and provider of specialized data management software, acquired the db4objects' database business of privately-held Servo Software, Inc. (formerly...

7.4 - Release Notes

Now is the time for the newer and better Stable version - 7.4 . As usual it is available in download center and recommended for product shipment. Note, that the production release did not change and is also 7.4. The most prominent db4o features introduced...

Abstracting Data Access: db4o example

I just run into a nice blog post by Nail Martin (" Prototyping : New wine, old skins ") where he shows how to abstract data access with db4o as the underlying persistence engine (Nail is a big fan of repositories and finders, updaters and basically any...

[Kudos] One of the simplest and most elegan...

"So db4o is in my view one of the simplest and most elegant data storage engines i have ever seen" http://neilmartinagile.wordpress.com/2008/11/26/prototyping-new-wine-old-skins/...

JavaFX db4o example

Jos Koenen just reported that an example of db4o underJavaFX is working just fine (you might also want to check the code in his previous post here ). Don't miss this opportunity to check JavaFX persistence with db4o (source code included). Although this...