PowerShell podcast to feature db4o

The next Powerscripting podcast (http://powerscripting.wordpress.com/) hosted by Hal Rottenberg will feature db4o's Powershell sample by Adriano Verona.
You can check the live video stream as they record the show! It'll air this Thursday at 9pm EST (GMT-5), unless otherwise noted on the blog.

Come and join us in the Powershell community!

Solving class loading issues with db4o and OSGi

Lukas Neukom kindly contributed a proof of concept (source code included) where he shows two ways to solve class loading issues with db4o and OSGi (by either using fragments or by implementing a bundle extender). The idea behind this is very similar to the OSGiDemo but instead of having to register the classes yourself they can be declared in the manifest. Enjoy! (thx Lukas!!).
http://projects.db4o.com/OSGiClassLoading

db4o v7.4 binaries available for Mono

Arne Claassen has contributed a tar.gz package with db4o v7.4 binaries for Mono. You can download it from the db4o Mono project page.
More info about the package in Arne's blog post. Thanks Arne!

New podcast about object databases and db4o

Alt.NET Podcast just featured db4o in Episode 14 entitled "Object Databases".Guests to the podcast are Rob Conery and James Avery.Topics discussed in the show: Object Database Database Styles Integration Database Applicatioon Database Matisse DB4Objects Crazy Talk: Reducing ORM Friction Database YAGNI Adoption of Object Databases Object Query Language Enjoy! =D Read the rest of entry »

Tips on indexing and query optimization

This blog post shows some indexing basics and performance tips by Arne Claassen. Among other things Arne shows you which assemblies to include to make sure your native queries can be optimized. Thanks Arne!

db4o v7.4 working on Mono

Arne Claassen has been playing with db4o under Mono and came up with a DLL for db4o v7.4 that works beautifully across .NET and Mono from a single build. See his blog post here.

Using db4o for unit test results verification

The author of Nails and Hammers shows how to use the TestSpy pattern (described in Gerard Meszaros' xUnit Test Patterns) in combination with db4o. TestSpy is a class that can be ‘injected' in a tested class in order to instrument and capture its behaviour. In this blog post TestSpy is used to persist objects that were being created in the tested method to be verified at a later stage. "I had wide number of choices how to implement the persistence - using a file, a regular sql database, embedded database like HSQLDB or H2.  I really wanted something simple, no extra server administration, table creation or  O/R mapping definition. I wanted to store and retrieve objects, so I decided to give it a try with an embedded object-oriented database. I chose db4o for no particular reason except that it seems to be pretty well established as a product and is coming with an open source license (GPL, though)" says the author. "Despite having not much of former exposure to db4o, it turned out pretty quick and simple. I f ... Read the rest of entry »