Alf’s blog about geek stuffs

It’s 6. a.m. I’ve not yet commited since the Acceleo’s SVN is down but I’ve achieved my first milestone : manage persistence. For now, Wisss allow to define a data model, similar to Merise and generate all DTO and DAO based upon Zend Framework.

I will enhance this feature in the future but it can already save dto in a mysql database. It manages 1-1, 1-n and n-n associations too. It allows you to save each object independently or in one step with a “sync” method. Loading is done by lazy loading and array of primitive type attributes are serialized to blob.

It avoids duplicate objects (and then save memory) by using a dto registry wich insure that there is only one instance of a same Business Object (or Dto, no distinction in Wisss for now) at a time.

Concerning the saving policy, I’ve put the focus on generating optimized queries. That’s why a change recorder observe each object for changes (sic!) and is then polled during saving process to only insert or update what is needed.

Finally, the “sync” method have to be preferred most of the time since it shortcuts the problem of browse a graph of objects. It browses the dto registry and save all new or modified objects. The save method will be useful for specific saving inside a transaction.

Bugs must remain but I’m very happy of what I’ve done, mainly in the last 2 days rush. I’m hopeful for the future, a future where I do not bother anymore about writing sql queries rather than concentrating on business logic. Simplicity like in Zope is possible, even in PHP !

See you later, I need to sleep and come back to my musician life for the week end.