Dell Vizioncore Manual de usuario descargar pdf (Pagina 495)

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Using the Query Language 495

Using the Query Language FAQ

{return false;}

Advanced scripting example

In most cases, you use the

scope variable as a parameter for the functions

alarmCount, descendents, and getContainedObjects. However, there may be a

situation in which you need to create a condition or expression that uses one of these

functions but want the function to be performed on an object outside of the rule or

derived metric scope.

For example, if you wanted to compare the alarm count for objects within the scope of a

rule with the alarm count for a specific server that is not within this scope, you could

specify a condition using the following syntax:

alarmCount(scope) > alarmCount(#!CatalystServer where name =

"Server_IP:1099"#.getTopologyObjects()[0])

Where Server_IP is the IP address of the server. For example:

alarmCount(scope) > alarmCount(#!CatalystServer where name =

"10.4.112.155:1099"#.getTopologyObjects()[0])

Note In the example shown above, the exclamation point ‘!’ implies that the argument passed to

the alarmCount function is a topology object property and not a metric.

Using the Query Language FAQ

This section provides answers to the following FAQs:

•“How do I reference a topology object property in an expression?” on page 495

•“How do I export metrics from the command line?” on page 496

How do I reference a topology object property in an expression?

If the rule is scoped to the topology object that has that property, you can reference the

property using the

scope variable. This variable contains a reference to the topology

object against which the expression runs.

For example, you are interested in the property

filesystemName, you can use the

following in an expression to obtain the property value:

"File system " + scope.get("filesystemName") + " is now full"

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