SDO, DAS, Data Services: standards for heterogeneous Data Access made easy
Posted in data access on Sep 3rd, 2008
Seen this article by Jean-Jacques Dubray on InfoQ, related to this other article by Arnon Rotem who explains why Database-as-a-Service (DBaaS) is a bad idea:
It circumvents the whole idea about “Services” - there’s no business logic
It makes for CRUD resources/services
It is exposing internal database structure or data rather than a thought-out contract
It encourages bypassing real services and [...]
Posted in data access on Sep 3rd, 2008
A good introduction to Data Services by John Goodson, VP and GM of DataDirect, as part of the last Data Services World event, last June in NY.
Posted in data access on Sep 2nd, 2008
Yet another ODBMS: NeoDatis.
I have no time to review its features, but it is so funny to see all these new ODBMS.
Posted in data access on Sep 2nd, 2008
NHibernate 2.0 arrived. It seems there is no support for LINQ yet, but it is on the roadmap a next major release (2.1).
It seems this blog frequently covers the differences between NHibernate and the Entity Framework:
http://blog.domaindotnet.com/2008/08/24/nhibernate-20-gold-released-must-wait-for-linq-to-nhibernate/
http://blog.domaindotnet.com/2008/06/29/nhibernate-20-goes-beta-1-while-microsoft-linq-to-entities-receives-vote-of-no-confidence-from-many-leading-net-experts-as-unacceptable/
http://blog.domaindotnet.com/2006/09/09/objectrelational-tools-nhibernate-and-microsoft-adonet-entity-framework/
Posted in data access on Sep 2nd, 2008
As described in this article there is a strong need for fetch plans is JPA. Some people, even within the JPA expert group, seem to think there is no need for a specific API for fetch plans, they could be covered by criteria APIs. I personnaly think that a fetch plan is not a criteria [...]
Posted in data access on Sep 2nd, 2008
Versioning of persistent objects is a complex probem. People, mostly in the finance industry, are looking for solutions to this since years (see this post for instance). It seems there are now some solutions emerging, like Envers from RedHat/JBoss.
It is not clear from their web site if Envers supports JPA or only Hibernate, it seems to me it [...]