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Jeff.Woeber

Clear an alert with a NaN value

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I recently wrote a datasource that pulled an API and alerted when the return value was greater than 0

The problem I ran into is the API never returned a 0, instead it would return NaN.  I worked around this issue by using Key = Value datapoints and a "if (strv.isEmpty) {" statement.  Basically, if their is a value returned the output in the script will be "events=[returned value]" the same as most key=value datapoints.  If the returned value is empty, the script will fill out the entire string returning "events=0" which puts a 0 in the datapoint and allows the alert to clear.  

This a nice workaround for a LogicMonitor Admin's bag of tricks.  

 

//Print KeyValue
strv = response_obj['results']['2'];

 if ( strv.isEmpty() )      { 
      println "events=0"
  
} else {

       println "events=" + strv;
}

return(0);

 

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In addition to that, in cases where you are not groovying or other calculations returns a NAN, you can also make a complex datapoint with 

if(un(datapoint_name),0,datapoint_name) and alert on that

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