I knew there was a reason that I couldn't define EsiObjects with 1-3 simple words. :-)
Again, a simple demo would be great.
Kevin
Terry Wiechmann <[EMAIL PROTECTED]> wrote:
Terry Wiechmann <[EMAIL PROTECTED]> wrote:
Sorry, a simple question to a teacher will produce this kind of response ;-)
My apologies...
The web application is a three-tier architecture. Direct web capability is
not a part of EsiObjects.
EsiObjects is a layer that sits on top of the MUMPS and implements an object
model (with MUMPS code and globals just like File Manager implements its
model). Additionally, EsiObjects provides support for TCP based
communications. The object model is accessed through sessions (processes)
that are TCP based. From the EsiObjects client (development or runtime), you
connect to the EsiObjects environment (a process on some MUMPS machine).
EsiObjects has several ways of connecting: 1) COM Bridge for MS Applications
2) Wireless, 3) Java Gateway and 4) CORBA (EsiORB) for enterprise wide
applications. These connectivity packages are written as a combination of
MUMPS and external code.
The EsiEnterprise web-based application is a three-tier application. It was
originally implemented to integrate and display data (within a web browser)
collected from CHCS and VistA systems. On the server side, the EsiObjects
environment (server or model side) contains VistA data wrappers (classes
generated from the VistA DD). These wrappers access VistA globals directly
(read-only because the application only pulls and displays data). A session
level object façade provides the application interface to the caller
(through the TCP layer) and accesses the wrappers to retrieve data. The
application itself resides on the application server and is written in
JSP/Java. This application uses the Java Gateway. That is, with the
EsiObjects development environment, a Java proxy is generated of the session
application façade and integrated into the application layer. The
application code on the application server uses this proxy interface to
communicate (transparently) with the EsiObjects environment on the server.
I had a demo up and running for some time but am in the process of
rebuilding all of my servers. When it is back up I will let you know.
The bottom line is this - it is not 'the' web approach - it is only one of
many approaches. Its just another choice for those that want to go the OO,
three-tier route - no competition intended :-)
Terry L. Wiechmann
www.esitechnology.com
978-779-0257
----- Original Message -----
From: "Jim Self" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Thursday, September 09, 2004 1:37 AM
Subject: Re: [Hardhats-members] web based access to VistA (was
EsiObjects...)
> Web based access to patient records and other VistA data is easily
accomplished with
> M2Web. It is not an aspect of EsiObjects that I am aware of. How would
that be done? Is
> some kind of demo of it already available?
>
> Bhaskar, what specifically do you want to demonstrate? Perhaps it could be
achieved with a
> small programming project.
>
> Bhaskar wrote:
> >ESIObjects is not yet a part of the OpenVistA VivA demo CD, but I would
> >like it to become a part of it, especially to demonstrate web based
> >access to patient records.
> >
> >-- Bhaskar
> >
> >On Mon, 2004-09-06 at 12:32, Kevin Toppenberg wrote:
> >> Terry,
> >>
> >> I wonder if it would be possible for you to write a
> >> SIMPLE demo of the ESI technology to include with the
> >> next VistA demo disk? I understand that Bhaskar is
> >> now including the ESI technology as part of the
> >> standard OpenVistA stack. It might be nice to be able
> >> to demonstrate what it can do.
> >>
> >> I think you told me what the technology is all about
> >> before, but without a picture or an app to associate
> >> it with, I keep forgetting.
> >>
> >> Just a thought. Thanks for your work on this.
> >>
> >> Kevin
> >>
> >>
> >> --- Terry Wiechmann <[EMAIL PROTECTED]>
> >> wrote:
> >>
> >> > Shortly ESI will be submitting the new EsiObjects
> >> > V4.1.1.2 kit to Open Source. Because of the
> >> > obsolescence of MSM and DSM, I've decided to
> >> > discontinue support for these two M systems. We will
> >> > be putting our efforts into enhancing EsiObjects for
> >> > GT.M and Cache, implementing the new Java client,
> >> > adding new packages and adding support for other
> >> > MUMPS implementations such as M21 and MUMPS V1.
> >> >
> >> >
> >> >
> >> > If anyone has a really strong objection to this
> >> > decision, please send me a mail message at
> >> > [EMAIL PROTECTED] or call me at
> >> > 978-779-5351.
> >> >
> >> >
> >> >
> >> > Terry L. Wiechmann
> >> > www.esitechnology.com
> >> > 978-779-0257
>
> ---------------------------------------
> Jim Self
> Systems Architect, Lead Developer
> VMTH Computer Services, UC Davis
> (http://www.vmth.ucdavis.edu/us/jaself)
>
>
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