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// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package newrelic
import "time"
// apdexZone is a transaction classification.
type apdexZone int
// https://en.wikipedia.org/wiki/Apdex
const (
apdexNone apdexZone = iota
apdexSatisfying
apdexTolerating
apdexFailing
)
// apdexFailingThreshold calculates the threshold at which the transaction is
// considered a failure.
func apdexFailingThreshold(threshold time.Duration) time.Duration {
return 4 * threshold
}
// calculateApdexZone calculates the apdex based on the transaction duration and
// threshold.
//
// Note that this does not take into account whether or not the transaction
// had an error. That is expected to be done by the caller.
func calculateApdexZone(threshold, duration time.Duration) apdexZone {
if duration <= threshold {
return apdexSatisfying
}
if duration <= apdexFailingThreshold(threshold) {
return apdexTolerating
}
return apdexFailing
}
func (zone apdexZone) label() string {
switch zone {
case apdexSatisfying:
return "S"
case apdexTolerating:
return "T"
case apdexFailing:
return "F"
default:
return ""
}
}
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