Re: Event-based actions

[Booth Martin <booth@xxxxxxxxxxxx>]

The dataque with trigger is pretty straight forward and provides the 
event and needed information.  Thats the first half of the problem.

Now, I need the other half, the listening part.  Lets say Sally has an 
inventory item on her screen and is talking with a customer and the 
screen shows:

On Hand - 12
Inbound - 12
Allocated - 22
Available - 2

In the call center there are 28 other folks taking orders and some one 
of those people sells 4 pieces, leaving as Available a minus 2.

At this point, I would like Sally's screen to refresh and reflect that 
there are none left to sell.  All without Sally doing anything and 
without a timer constantly refreshing her screen every nn seconds.

This is fairly common in the new world, but it isn't clear to me how we 
do  this on our platform.

Here is a simplistic example:

http://www.martinvt.com/Code_Samples/Kiosk_Clock/kiosk_clock.html

This clock refreshes every n.nn minutes, based on a timer.  I would 
rather that when another program sent a change in the time, a "listener" 
would hear the message and poke the clock program with the new time to 
be displayed.

An Executive Dashboard is another example of the problem.  How does one 
refresh that screen by other than a cycle started with a timer?




On 9/2/2012 8:00 PM, Mark S Waterbury wrote:
> Hi, Booth:
>
> I think it would help if you could attempt to describe what problem you
> are trying to solve,  or what you are trying to accomplish.  In other
> words, what are your goals or objectives.
>
> Thanks,
>
> Mark S. Waterbury
>
>   > On 9/2/2012 8:38 PM, Booth Martin wrote:
> > This seems simple enough yet I am stumbling all over the school yard
> > with it.
> >
> > This has to do with event-based actions versus waiting for the Enter key
> > to be pressed or for a timer to run out..
> >
> > This is a fairly simplistic case, but it should serve to demonstrate the
> > problem I am trying to solve.
> >
> > Lets say a desktop gadget displays the local temperature.    When the
> > temperature changes, the gadget changes the display.  As I understand
> > it, this is accomplished by a "listener" that "listens" for a
> > temperature change event from the mother ship.  It is not a timer that
> > periodically checks to see what the temperature is.  When the listener
> > hears that the temperature has changed, it alerts the desktop gadget and
> > my desktop display shows the new temperature.  As I said, this is a
> > simplistic case.
> >
> > So, in midrange world, how do I mimic the behavior of a listener and of
> > events?
> >
> > This may not be well presented.  For that I apologize.  Of course, if I
> > understood the issue better I probably would also know the answer,
> > right?   ;)  If you have questions, please ask.  That may help me
> > explain my issue better.