thresholds

Trigger events when a threshold has been breached for a period of time.

Useful for alerts, scaling etc based on the values of metrics.

npm install --save thresholds

Usage

const Threshold = require( 'thresholds' );

const cpuUsage = Threshold( '>', 75, 2 );

cpuUsage.on( 'breach', function()
{
  // send alert!
});

cpuUsage.on( 'clear', function()
{
  // send all clear!
});

cpuUsage.update( 50 ); 

cpuUsage.update( 99 ); 
cpuUsage.update( 95 ); 
// breach event emitted

API

operator

String. Either < or >.

threshold

Used with the operator passed to decide if the threshold has been breached.

updates

Number of subsequent updates needed before a breach/clear event is fired.

License

MIT