PROTECTED]
To: hardhats-members@lists.sourceforge.net
Sent: Friday, March 17, 2006 7:51 PM
Subject: Re: [Hardhats-members] persistence layers for VistA integration
(was Re: [Hardhats-members] Rewriting CPRS in Java)
On Mar 17, 2006, at 6:12 PM, Richard Schilling wrote:
The whole concept
On Mar 18, 2006, at 9:45 AM, James Gray wrote:
Greg, I want you to know that I appreciate your theoretical
understanding of these issues and your willingness to comment on
them. I suspect I am not the only one on the list who finds many
of your posts educational.
Jim Gray
Well, now
On Mar 17, 2006, at 8:40 PM, Gregory Woodhouse wrote:
Does JDO support a query mechanism or is just a framework for
object storage and retrieval?
I may have (partially?) answered my own question. The ODMG web site
says that the Java binding in the ODMG standard is superseded by JDO.
===
Gregory Woodhouse wrote:
(snip)
Does JDO support a query mechanism or is just a framework for object
storage and retrieval?
Yes. There's a complete query mechansim. You can read about it in the
JDO spec:
http://jcp.org/aboutJava/communityprocess/final/jsr012/index2.html
===
: [Hardhats-members] persistence layers for VistA integration
(was Re: [Hardhats-members] Rewriting CPRS in Java)
Date: Fri, 17 Mar 2006 19:48:23 -0800
Gregory Woodhouse wrote:
()
It might be a good idea to start out by defining what you mean by a true
object store. I doubt seriously
The whole concept of rewriting CPRS in Java gives us the opportunity to
look at the notion of a persistence layer versus a true object store.
So far what we've seen are various implementations of persistence
layers, such as ESI Objects and Cache. Good persistence layers are
obviously key
I have a correction to my post:
It is interesting to note that since Caché provides a JDBC driver
for it's data store, it is possible to use jpox to persist Java objects
*in MUMPS through JDBC* as opposed to using Caché Objects directly.
Richard
Richard Schilling wrote:
The whole
On Mar 17, 2006, at 6:12 PM, Richard Schilling wrote:
The whole concept of rewriting CPRS in Java gives us the
opportunity to look at the notion of a persistence layer versus a
true object store.
It might be a good idea to start out by defining what you mean by a
true object store. I
On Mar 17, 2006, at 6:12 PM, Richard Schilling wrote:
The whole concept of rewriting CPRS in Java gives us the
opportunity to look at the notion of a persistence layer versus a
true object store.
In your original post, you focused primarily on object storage and
access. Those are
Gregory Woodhouse wrote:
()
It might be a good idea to start out by defining what you mean by a
true object store. I doubt seriously that we're all on the same page here.
Right ... good call. By true object store I mean a data store that is
capable of storing a) entire objects
Gregory Woodhouse wrote:
In your original post, you focused primarily on object storage and
access. Those are important, of course, but we can hardly ignore the
question of how that database should be queried: What is the most
natural way to refer to objects? If we have OIDs we're in
On Mar 17, 2006, at 7:50 PM, Richard Schilling wrote:
Gregory Woodhouse wrote:
In your original post, you focused primarily on object storage
and access. Those are important, of course, but we can hardly
ignore the question of how that database should be queried: What
is the most
. Whatever you
do the to java object happens to the cache object.
Good day,
Douglas
a 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
Someone stated:
JDO can use b-tree storages to store Java object trees directly.*That's* an object store.
I believe that is exactly how Cache stores its objects. I do not believe that all Cache objects are stored as flat files with b-tree indexes.
So, the bottom line is that VA can employ their current infrastructure
to accomplish what it is seeking bids for. Hmm.
- Original Message -
From: Steven McPhelan [EMAIL PROTECTED]
Date: Wednesday, March 15, 2006 8:59 am
Subject: Re: [Hardhats-members] Rewriting CPRS in Java
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
Subject: Re: [Hardhats-members] Rewriting CPRS in Java
To: hardhats-members@lists.sourceforge.net
Someone stated:
JDO can use b-tree storages to store Java object trees directly.
*That's* an object store.
I believe that is exactly how Cache stores its objects. I do not
believethat all Cache
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.
@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
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
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
Of Richard
Schilling
Sent: Wednesday, March 15, 2006 6:44 PM
To: hardhats-members@lists.sourceforge.net
Subject: Re: [Hardhats-members] Rewriting CPRS in Java
Awesom! Thanks, Doug.
How do the Java classes interact with their brethren on the MUMPS
server? Or do they?
Richard
Douglas M
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
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
--- [EMAIL PROTECTED] wrote:
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
Absoutely! I'm looking at the feasibility of doing this. There was
also a Request for Information released by the Veterans Administration
for companies that could move from MUMPS to object databases, which in
my book automatically implies Java based designs.
Happy to collaborate, etc... on
So Cache' Objects does not constitute an Object Database?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Richard
Schilling
Sent: Monday, March 13, 2006 9:35 PM
To: hardhats-members@lists.sourceforge.net
Subject: Re: [Hardhats-members] Rewriting CPRS
PROTECTED] On Behalf Of Richard
Schilling
Sent: Monday, March 13, 2006 9:35 PM
To: hardhats-members@lists.sourceforge.net
Subject: Re: [Hardhats-members] Rewriting CPRS in Java
Absoutely! I'm looking at the feasibility of doing this. There was
also a Request for Information released
Is any one working on rewriting CPRS in Java so it is
independent of Windows? I would like to get in touch with anyone
interested in this project or has made an estimate of the
quantum of work involved. It would be more economical if it is
done from India and we are looking at the possibility of
The VA version of the CPRS client in JAAV is on the FOIA site.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Joseph
Puthooran
Sent: Monday, March 06, 2006 6:57 AM
To: hardhats-members@lists.sourceforge.net
Subject: [Hardhats-members] Rewriting
] Rewriting CPRS in Java
Is any one working on rewriting CPRS in Java so it is
independent of Windows? I would like to get in touch with anyone
interested in this project or has made an estimate of the
quantum of work involved. It would be more economical if it is
done from India and we are looking
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