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InterJob-communication

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Demo of IJC

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Earlier I’ve written about command pipes.
This is the internal variant of a PIPE.

To make this more tangible and visible for you I prepared a small example
 
The scenario is to run a monitoring process that receives
input from an unknown number of sensors. 
(Could be Lab equipment or similar.) 

The monitor should not poll his sensors nor run
in a hang loop to scan a common global 
and work independently of any disk access. 
 
To try it log into a terminal 
.    DO ##class(IJC.Demo).%Start()  
The Highlander principle applies for this example: There can only be one  

Next open a new terminal and run
.    DO ##class(IJC.Demo).Sensor(“mytext”)
and see what happens.

It’s clear that for real applications:

  • the monitor might run in a background tasks
  • the sensors will do something useful.
    But this reduces visibility.

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Made with
Version
1.0.216 Sep, 2023
Category
Technology Example
Works with
InterSystems IRISCachéEnsemble
First published
04 Dec, 2022
Last checked by moderator
01 Nov, 2023Works