That is exactly what I wanted to say, thanks Douglas. :) ----- Original Message ----- From: "Douglas M. PREISER" <[EMAIL PROTECTED]> Date: Wednesday, March 15, 2006 3:02 pm Subject: Re: [Hardhats-members] Rewriting CPRS in Java To: hardhats-members@lists.sourceforge.net
> Cache Objects are stored in Globals. They are stored as objects, > not tables. > The %Save method of the class is used to store the object. We all > know that > globals are multi-dimensional so there is no problem storing > complex > objects. > > The SQL presentation is achieved by generating code when the Cache > class is > compiled to handle SQL queries into the database. The SQL queries > are > translated into M code which loops through the globals. The table > names > default to the class names. > > The Caché Java binding takes a class defined in a Caché database > and creates > a corresponding Java class from it. This generated class provides > remote > access to a Caché class from Java. > > The SQL projection is accessable through ODBC. You can link to a > Cache > database from, say, SQL Server, and do queries. > > Thanks, > Douglas > > >From: Richard Schilling <[EMAIL PROTECTED]> > >Reply-To: hardhats-members@lists.sourceforge.net > >To: hardhats-members@lists.sourceforge.net > >Subject: Re: [Hardhats-members] Rewriting CPRS in Java > >Date: Wed, 15 Mar 2006 11:32:41 -0800 > > > >Jim Self wrote: > >>Richard Schilling wrote: > >> > >>>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. > >> > >> > >>Perhaps, but I think you may be misinterpreting the Cache' > documentation. > >>I believe that > >>your statement that "Cache is obviously storing their data in a > SQL data > >>base" is simply > >>false. > > > >The defining characteristic of all SQL servers is the > presentation of data > >by means of a SQL syntax. > > > >The SQL specification doesn't dictate implemenation of the data > store. So, > >if Cache presents data as SQL structures ... it's a SQL server. > > > >I would hope Cache uses the MUMPS data store for its data. > > > >>You seem to be saying that because data is retrievable via SQL > it must be > >>stored in a way > >>that is ONLY retrievable via SQL. I am not a user of Cache', but > I know > >>that that is not > > > >Not saying that at all. I would hope Cache data is retrievable > by MUMPS as > >well. It's a testament to the strength of the MUMPS platform. > > > >But there's a point where "another view" of the data is > counterproductive - > >but then again consider the fact I'm dealing with new development > so I > >don't have any Cache' dependent code to worry about. > > > >My goal is integration of VistA into cross-platform technologies. > Cache > >doesn't fit that model very well .... if someone can explain how > it can I'm > >all ears. > > > > > >> > >>What does it mean when they say that "Cache' classes can be > projected as > >>Java classes"? > > > >I have no idea. Looks like they're jumping on ESI Objects' coat > tails.> > >>What are the essential properties of a "true object store" that > is not > >>tied exclusively to > >>Java? > > > >Generally, the entire class - its methods and members - are > persisted in an > >object store - not just it's members. > > > > > >>--------------------------------------- > >>Jim Self > >>Systems Architect, Lead Developer > >>VMTH Computer Services, UC Davis > >>(http://www.vmth.ucdavis.edu/us/jaself) > >> > >> > >>------------------------------------------------------- > >>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_______________________________________________>>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&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 > 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. 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