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At 08:36 PM 10/20/03, you wrote:
I've not had very much success with the SNDBRKMSG solution. For example can
Bob send a break message to Alice, or must he first find out her device
name?
Another poster alludes to using any message queue. It seems prudent to use
a queue tied to the user's id.
Actually, I am not trying to communicate between programs. All of the data
is in the same copy of the same program, if I understand what multiple
devices do.
_Two_ jobs can display the same data by simply reading it from the same
source. It doesn't have to be one program with two displays.
It still isn't clear to me if one device can open/interrupt
another device.
Not if the device is in use. In order to ACQ (acquire) the device, it must
not be signed on. The only mechanism I'm aware of, in fact a *purpose
built* mechanism for interrupting a job, is with a break handling program.
I want Alice's and Bob's screens to have identical windows
with identical data, and have the data scroll, much the same as instant
messaging works although this could not be feature rich like Sametime and
other instant messaging applications.
Imagine a simple table
ConvID 11p 0
SeqNum 11p 0
FromID 10a
Message 80a
Unique Key by ConvId and SeqNum.
Both Bob & Alice can be running TALK, and as long as they both share the
same ConvID, they would both be able to retrieve the (admittedly
simplistic) same set of data. In fact, any number of devices can 'see' the
conversation as long as they have the conversation id.
The only 'interesting' tidbit is how to notify any participants in the
conversation as soon as someone enters a new record into the
conversation. Any number of techniques could be used - data queues,
sockets, probably the good old end-of-file delay.
As I said, this has no real relevance. I just want to have a problem to
work through, to see if it is possible.
Good plan. I often do the same.
Regards,
Rich
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