SDO, DAS, Data Services: standards for heterogeneous Data Access made easy
Posted in data access on Jan 16th, 2008
Interesting article seen on TheServerSide about Querying Gigaspaces with JDBC.
GigaSpaces has a very compelling caching technology. And caching is an extremely important component of a Data Acces Layer in SOA.
Posted in data access on Jan 15th, 2008
I have seen some early implementations of the DAS relying on POJOs persistence (JPA, JDO). Conversely, we could imagine JPA implementation built on top of a DAS. Interesting to see that both approaches have their own benefits.
At Xcalia, our first implementation of the DAS was heavily relying on our POJO persistence mechanisms. We are currenlty working [...]
Posted in data access on Jan 15th, 2008
This article on InfoQ links to this comparison between frameworks.
It always seemed odd to me to compare 2 standards (EJB CMP, JPA) and 2 products (Hibernate, Toplink). JDO is not in the list, which means this comparison is not really neutral and at least not technically oriented. I don’t know what was the goal of [...]
Posted in data access on Jan 15th, 2008
This articles on InfoQ links to a 10 minutes JAOO interview.
Summary
In this interview, Jimmy focuses on LINQ to SQL and ORM. Jimmy has tried to create a similar technology to LINQ to SQL in the past, but without similar results. While LINQ to SQL is a step in the right direction, .NET still lags behind [...]
Posted in data access on Jan 15th, 2008
For sure ODBMS did a lot to standardized advanced QL. Hibernate HQL itself has been inspired by ODMG’s OQL as JDOQL or JPAQL as well.
The guys at DB4O are also doing a good job and investigate new approaches. LinQ from Microsoft is alternate approach of statically checked queries.
Having an object-capable Query Language is a pre-requesite to manipulate Business [...]
Posted in data access on Jan 15th, 2008
Seen on InfoQ, this one hour interview of Linda DaMichael. Hopefully, JPA 2 will become much more complete in its scope and coverage of persistence needs. It is nice to see JPA is now standardized outisde the EJB 3 specification, because it is obviously a very generic standard. And eventually we’ll be able to align and synchronize JPA [...]