Why do we need to use the $ prefix when defining default alarm thresholds for exception values?

Solved477 viewsalarm monitoring Connector driver development exception threshold
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Hi Dojo

The DataMiner Development Guide explains that we should use the $ prefix when defining default alarm values for exception values in a protocol: Alarming | DataMiner Docs. I'm wondering why we need that prefix. Would anyone know the technical background?

Thank you in advance!

Kind regards

Michiel Clepkens [SLC] [DevOps Advocate] Selected answer as best 5th November 2024

1 Answer

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This is because it uses the same syntax as the alarm template configuration.

There you just pass on a value to monitor on. The dollar sign tells SLElement that this is an exception value and is treated slightly different than normal values.

Michiel Clepkens [SLC] [DevOps Advocate] Selected answer as best 5th November 2024
Michiel Clepkens [SLC] [DevOps Advocate] commented

Thank you for your answer Davy. It’s clear now. Much appreciated!