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- Xref: sparky comp.sys.mac.programmer:20551 comp.sys.mac.comm:12571 comp.os.vms:20224
- Newsgroups: comp.sys.mac.programmer,comp.sys.mac.comm,vms.networks.desktop.pathworks,comp.os.vms
- Path: sparky!uunet!worldbank.org!fodremote_10
- From: rpcfod@nimbus.worldbank.org (Robert Patt-Corner)
- Subject: Driving a Terminal Session from Desktop
- Message-ID: <rpcfod-020193222525@fodremote_10.worldbank.org>
- Followup-To: comp.sys.mac.programmer
- Sender: news@worldbank.org
- Organization: The World Bank
- Date: Sun, 3 Jan 1993 03:44:45 GMT
- Lines: 63
-
- We've got an interesting application coming up, and I'd be grateful for any
- thoughts by folks who have done or approached it...
-
- There's a garden-variety VMS ORACLE database driven by an ugly VMS
- SQL*FORMS application and a truly convoluted VMS SQL*MENUing system. All
- access is by Mac terminal emulation using Reflection 2+ by WRQ. In due
- time as decent tools become available we'll break out everything from the
- forms on down in some sort of cross-platformable product on the Mac, but
- for now waiting seems wise.
-
- We would, however, like to break out those twisty menus in the short term.
- It's easy to hit a database from the Mac, but controlling VMS programs is
- another matter. Since Apple in its wisdom has not embraced DCE or any
- other remote procedure call, we've written some homemade code that drives
- DCL (and invokes programs and receives values) by means of the
- ADSP<=>DECNet tool and a DECNet object, so controlling VMS programs is
- feasible if ugly.
-
- Given that, we can build a menu system on the Mac using Hypercard or most
- anything else (let's assume Hypercard for simplicity), and we can fire up
- the appropriate SQL*FORMS program. Here comes the question now ...
-
- How to best move the user to an interactive SQL*FORMS session and back to
- the menu when done. Our normal terminal emulator is Reflection2+. So far,
- ideas are:
-
- 1. Write some roll-your-own frontware, opening a terminal window from HC,
- letting the user interact and closing it when done. Who knows if you can
- even do terminal stuff over AppleTalk/DECNet with our object, but we could
- always fire up another connection under LAT. Ugly and hard to maintain
- tho, and I don't like the security implications.
-
- 2. Fire up R2+ with AppleEvents (if it understands them) and drive it by
- invoking R2 scripts with AppleEvents. We've put this one out to WRQ for
- contemplation. They're not listed in the AERegistry though ... I like
- this one, but wonder about returning control. Guess it could be in each
- script.
-
- 3. Fire up R2+ and drive it from the VMS end ... the Menu program would
- talk to a server we'd write on VMS who would control a child process
- connected to the R2+ session. Is it feasible? How to communicate ... can
- VMS mailboxes do this? Is it wise?
-
- 4. Invest in some frontware tools like MacWorkstation or MitemView and
- simply drive a hidden terminal session until it is needed. We're missing
- any kind of user experience with these tools, and would love to hear what's
- out there, particularly regarding capability building a menu system.
- Philosophically I don't like frontware, but as a menu and not a forms
- driver it might do ...
-
- 5. Drive MacX by means of the HC program but from the VMS side. This is
- relatively easy ... an X-server is kind of designed to do the display work
- needed here. But we'd prefer not to give the users yet another terminal
- learning experience, and there would be significant memory upgrade costs
- ... MacX is a hog.
-
- Anyway, feedback on any or all of these approaches as well as relevant
- experiences and opinions are gratefully solicited. Probably mail is best
- ... unless there is more general interest in the subject than seems likely.
-
- Thanks --
-
- R.
-