Switch to the persistency framework Data Objects.NET 4.0

Long time ago I've decided to use DataObjects.NET as ORM framework. The content management of our company homepage www.mse-it.de relies soley on it. It also uses some JQuery plugins for layouting. You can find them on my private homepage under JQuery Projects.

A view months ago they announced the new 4.0 version. It is licenced under GPL and comes along with some propertiary licence models. It is a awesome framework, with goundbreaking changes to any ORM i know.

But i miss some important things:

• Syncronsiation or replication like SQL - but on the level of business objects
• Update and upgrade support
• Backup and resorte support

So i've decided to use syncronsation and distribution knowledge from our software for travel agencies (comes with replication, backup update and so on) and build a framework for it that is able to:

• Syncronize
• Backup
• Deploy

In the moment i am working on syncronisation and update issues. Because x-tensive follows the "sorce code is source of everything" (SCSE) pattern, i will do too.

Here is a sample class form my NUnit tests:

[Sync]
class TestEntity : SyncEntity
{
   [Field]
   [RevAdd(Rev.B_0_1)]
   public string Payload { get; set;  }

   [Field]
   [RevAdd(Rev.B_0_1)]
   [RevRenamed("FieldNoSync",Rev.B_0_1)]
   [SyncVersionNoUpdate]
   public string FieldWithSyncVersionNoUpdate { get; set; }

   public string NoFieldProperty
   {
       get { return "";  }
       set {}
   }
}

The RevXXX (Revision) attributes will tell the framework when a property is introduced, deleted or the name changed. So the backup and synchronization layer can automatically do the necessary transformations between the versions.