True. The reason for my interest is that the VA current employs Cache' as it "post-relational" database. Why not simply use is existing components to write Java front-ends to the data store, as they are doing with some of the re-hosting projects? An open source equivalent would take some time to develop, not to mention the porting of existing data.
----- Original Message ----- From: Richard Schilling <[EMAIL PROTECTED]> Date: Tuesday, March 14, 2006 3:41 pm Subject: Re: [Hardhats-members] Rewriting CPRS in Java To: hardhats-members@lists.sourceforge.net > When objects are stored wholesale in an object store, I call it an > object database. When object data is stored in a SQL database and > then > managed by some intermediary API, I call it a persistence layer. > > So, perhaps we're splitting hairs here. > > Roy Gaber wrote: > > the ideal high-performance database for Java applications. Caché > data > > can be accessed with SQL via JDBC, and Caché classes can be > projected as > > (snip) > > > Caché’s efficient multidimensional data engine has excellent SQL > > response – up to 20 times faster than relational databases. > Caché > > > > The key here is that Cache is obviously storing their data in a > SQL data > base. A lot of object *data* is persisted in SQL databases, but > the > Cache objects themselves aren't? > > So, I would call Cache Objects a persistence layer, but not a true > object store. > > Compare with Java Data Objects: > > "JDO defines interfaces and classes to be used by application > programmers when using classes whose instances are to be stored in > persistent storage (persistence-capable classes)." > > JDO can use b-tree storages to store Java object trees directly. > *That's* an object store. > > > Richard > > > > > ------------------------------------------------------- > This SF.Net email is sponsored by xPML, a groundbreaking scripting > languagethat extends applications into web and mobile media. > Attend the live webcast > and join the prime developer group breaking into this new coding > territory!http://sel.as- > us.falkag.net/sel? cmd=lnk&kid=110944&bid=241720&dat=121642_______________________________ ________________ > Hardhats-members mailing list > Hardhats-members@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/hardhats-members > ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid0944&bid$1720&dat1642 _______________________________________________ Hardhats-members mailing list Hardhats-members@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hardhats-members
