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// Copyright 2016 Circonus, Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package checkmgr
import (
"github.com/circonus-labs/circonus-gometrics/api"
)
// IsMetricActive checks whether a given metric name is currently active(enabled)
func (cm *CheckManager) IsMetricActive(name string) bool {
cm.availableMetricsmu.Lock()
defer cm.availableMetricsmu.Unlock()
return cm.availableMetrics[name]
}
// ActivateMetric determines if a given metric should be activated
func (cm *CheckManager) ActivateMetric(name string) bool {
cm.availableMetricsmu.Lock()
defer cm.availableMetricsmu.Unlock()
active, exists := cm.availableMetrics[name]
if !exists {
return true
}
if !active && cm.forceMetricActivation {
return true
}
return false
}
// AddMetricTags updates check bundle metrics with tags
func (cm *CheckManager) AddMetricTags(metricName string, tags []string, appendTags bool) bool {
tagsUpdated := false
if appendTags && len(tags) == 0 {
return tagsUpdated
}
currentTags, exists := cm.metricTags[metricName]
if !exists {
foundMetric := false
if cm.checkBundle != nil {
for _, metric := range cm.checkBundle.Metrics {
if metric.Name == metricName {
foundMetric = true
currentTags = metric.Tags
break
}
}
}
if !foundMetric {
currentTags = []string{}
}
}
action := ""
if appendTags {
numNewTags := countNewTags(currentTags, tags)
if numNewTags > 0 {
action = "Added"
currentTags = append(currentTags, tags...)
tagsUpdated = true
}
} else {
if len(tags) != len(currentTags) {
action = "Set"
currentTags = tags
tagsUpdated = true
} else {
numNewTags := countNewTags(currentTags, tags)
if numNewTags > 0 {
action = "Set"
currentTags = tags
tagsUpdated = true
}
}
}
if tagsUpdated {
cm.metricTags[metricName] = currentTags
}
if cm.Debug && action != "" {
cm.Log.Printf("[DEBUG] %s metric tag(s) %s %v\n", action, metricName, tags)
}
return tagsUpdated
}
// addNewMetrics updates a check bundle with new metrics
func (cm *CheckManager) addNewMetrics(newMetrics map[string]*api.CheckBundleMetric) bool {
updatedCheckBundle := false
if cm.checkBundle == nil || len(newMetrics) == 0 {
return updatedCheckBundle
}
cm.cbmu.Lock()
defer cm.cbmu.Unlock()
numCurrMetrics := len(cm.checkBundle.Metrics)
numNewMetrics := len(newMetrics)
if numCurrMetrics+numNewMetrics >= cap(cm.checkBundle.Metrics) {
nm := make([]api.CheckBundleMetric, numCurrMetrics+numNewMetrics)
copy(nm, cm.checkBundle.Metrics)
cm.checkBundle.Metrics = nm
}
cm.checkBundle.Metrics = cm.checkBundle.Metrics[0 : numCurrMetrics+numNewMetrics]
i := 0
for _, metric := range newMetrics {
cm.checkBundle.Metrics[numCurrMetrics+i] = *metric
i++
updatedCheckBundle = true
}
if updatedCheckBundle {
cm.forceCheckUpdate = true
}
return updatedCheckBundle
}
// inventoryMetrics creates list of active metrics in check bundle
func (cm *CheckManager) inventoryMetrics() {
availableMetrics := make(map[string]bool)
for _, metric := range cm.checkBundle.Metrics {
availableMetrics[metric.Name] = metric.Status == "active"
}
cm.availableMetricsmu.Lock()
cm.availableMetrics = availableMetrics
cm.availableMetricsmu.Unlock()
}
// countNewTags returns a count of new tags which do not exist in the current list of tags
func countNewTags(currTags []string, newTags []string) int {
if len(newTags) == 0 {
return 0
}
if len(currTags) == 0 {
return len(newTags)
}
newTagCount := 0
for _, newTag := range newTags {
found := false
for _, currTag := range currTags {
if newTag == currTag {
found = true
break
}
}
if !found {
newTagCount++
}
}
return newTagCount
}
|
