forked from mirrors/statsd_exporter
Merge pull request #162 from prometheus/grobie/reduce-indentation
Break out event handling into its own function
This commit is contained in:
Matthias Rampke
GitHub
commit
040760ec22
1 changed files with 125 additions and 120 deletions
245
exporter.go
245
exporter.go
|
|
@ -253,6 +253,8 @@ func escapeMetricName(metricName string) string {
|
|||
return metricName
|
||||
}
|
||||
|
||||
// Listen handles all events sent to the given channel sequentially. It
|
||||
// terminates when the channel is closed.
|
||||
func (b *Exporter) Listen(e <-chan Events) {
|
||||
for {
|
||||
events, ok := <-e
|
||||
|
|
@ -261,130 +263,133 @@ func (b *Exporter) Listen(e <-chan Events) {
|
|||
return
|
||||
}
|
||||
for _, event := range events {
|
||||
var help string
|
||||
metricName := ""
|
||||
prometheusLabels := event.Labels()
|
||||
|
||||
mapping, labels, present := b.mapper.GetMapping(event.MetricName(), event.MetricType())
|
||||
if mapping == nil {
|
||||
mapping = &mapper.MetricMapping{}
|
||||
}
|
||||
|
||||
if mapping.Action == mapper.ActionTypeDrop {
|
||||
continue
|
||||
}
|
||||
|
||||
if mapping.HelpText == "" {
|
||||
help = defaultHelp
|
||||
} else {
|
||||
help = mapping.HelpText
|
||||
}
|
||||
if present {
|
||||
metricName = escapeMetricName(mapping.Name)
|
||||
for label, value := range labels {
|
||||
prometheusLabels[label] = value
|
||||
}
|
||||
} else {
|
||||
eventsUnmapped.Inc()
|
||||
metricName = escapeMetricName(event.MetricName())
|
||||
}
|
||||
|
||||
switch ev := event.(type) {
|
||||
case *CounterEvent:
|
||||
// We don't accept negative values for counters. Incrementing the counter with a negative number
|
||||
// will cause the exporter to panic. Instead we will warn and continue to the next event.
|
||||
if event.Value() < 0.0 {
|
||||
log.Debugf("Counter %q is: '%f' (counter must be non-negative value)", metricName, event.Value())
|
||||
eventStats.WithLabelValues("illegal_negative_counter").Inc()
|
||||
continue
|
||||
}
|
||||
|
||||
counter, err := b.Counters.Get(
|
||||
metricName,
|
||||
prometheusLabels,
|
||||
help,
|
||||
)
|
||||
if err == nil {
|
||||
counter.Add(event.Value())
|
||||
|
||||
eventStats.WithLabelValues("counter").Inc()
|
||||
} else {
|
||||
log.Debugf(regErrF, metricName, err)
|
||||
conflictingEventStats.WithLabelValues("counter").Inc()
|
||||
}
|
||||
|
||||
case *GaugeEvent:
|
||||
gauge, err := b.Gauges.Get(
|
||||
metricName,
|
||||
prometheusLabels,
|
||||
help,
|
||||
)
|
||||
|
||||
if err == nil {
|
||||
if ev.relative {
|
||||
gauge.Add(event.Value())
|
||||
} else {
|
||||
gauge.Set(event.Value())
|
||||
}
|
||||
|
||||
eventStats.WithLabelValues("gauge").Inc()
|
||||
} else {
|
||||
log.Debugf(regErrF, metricName, err)
|
||||
conflictingEventStats.WithLabelValues("gauge").Inc()
|
||||
}
|
||||
|
||||
case *TimerEvent:
|
||||
t := mapper.TimerTypeDefault
|
||||
if mapping != nil {
|
||||
t = mapping.TimerType
|
||||
}
|
||||
if t == mapper.TimerTypeDefault {
|
||||
t = b.mapper.Defaults.TimerType
|
||||
}
|
||||
|
||||
switch t {
|
||||
case mapper.TimerTypeHistogram:
|
||||
histogram, err := b.Histograms.Get(
|
||||
metricName,
|
||||
prometheusLabels,
|
||||
help,
|
||||
mapping,
|
||||
)
|
||||
if err == nil {
|
||||
histogram.Observe(event.Value() / 1000) // prometheus presumes seconds, statsd millisecond
|
||||
eventStats.WithLabelValues("timer").Inc()
|
||||
} else {
|
||||
log.Debugf(regErrF, metricName, err)
|
||||
conflictingEventStats.WithLabelValues("timer").Inc()
|
||||
}
|
||||
|
||||
case mapper.TimerTypeDefault, mapper.TimerTypeSummary:
|
||||
summary, err := b.Summaries.Get(
|
||||
metricName,
|
||||
prometheusLabels,
|
||||
help,
|
||||
mapping,
|
||||
)
|
||||
if err == nil {
|
||||
summary.Observe(event.Value())
|
||||
eventStats.WithLabelValues("timer").Inc()
|
||||
} else {
|
||||
log.Debugf(regErrF, metricName, err)
|
||||
conflictingEventStats.WithLabelValues("timer").Inc()
|
||||
}
|
||||
|
||||
default:
|
||||
panic(fmt.Sprintf("unknown timer type '%s'", t))
|
||||
}
|
||||
|
||||
default:
|
||||
log.Debugln("Unsupported event type")
|
||||
eventStats.WithLabelValues("illegal").Inc()
|
||||
}
|
||||
b.handleEvent(event)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// handleEvent processes a single Event according to the configured mapping.
|
||||
func (b *Exporter) handleEvent(event Event) {
|
||||
mapping, labels, present := b.mapper.GetMapping(event.MetricName(), event.MetricType())
|
||||
if mapping == nil {
|
||||
mapping = &mapper.MetricMapping{}
|
||||
}
|
||||
|
||||
if mapping.Action == mapper.ActionTypeDrop {
|
||||
return
|
||||
}
|
||||
|
||||
help := defaultHelp
|
||||
if mapping.HelpText != "" {
|
||||
help = mapping.HelpText
|
||||
}
|
||||
|
||||
metricName := ""
|
||||
prometheusLabels := event.Labels()
|
||||
if present {
|
||||
metricName = escapeMetricName(mapping.Name)
|
||||
for label, value := range labels {
|
||||
prometheusLabels[label] = value
|
||||
}
|
||||
} else {
|
||||
eventsUnmapped.Inc()
|
||||
metricName = escapeMetricName(event.MetricName())
|
||||
}
|
||||
|
||||
switch ev := event.(type) {
|
||||
case *CounterEvent:
|
||||
// We don't accept negative values for counters. Incrementing the counter with a negative number
|
||||
// will cause the exporter to panic. Instead we will warn and continue to the next event.
|
||||
if event.Value() < 0.0 {
|
||||
log.Debugf("Counter %q is: '%f' (counter must be non-negative value)", metricName, event.Value())
|
||||
eventStats.WithLabelValues("illegal_negative_counter").Inc()
|
||||
return
|
||||
}
|
||||
|
||||
counter, err := b.Counters.Get(
|
||||
metricName,
|
||||
prometheusLabels,
|
||||
help,
|
||||
)
|
||||
if err == nil {
|
||||
counter.Add(event.Value())
|
||||
|
||||
eventStats.WithLabelValues("counter").Inc()
|
||||
} else {
|
||||
log.Debugf(regErrF, metricName, err)
|
||||
conflictingEventStats.WithLabelValues("counter").Inc()
|
||||
}
|
||||
|
||||
case *GaugeEvent:
|
||||
gauge, err := b.Gauges.Get(
|
||||
metricName,
|
||||
prometheusLabels,
|
||||
help,
|
||||
)
|
||||
|
||||
if err == nil {
|
||||
if ev.relative {
|
||||
gauge.Add(event.Value())
|
||||
} else {
|
||||
gauge.Set(event.Value())
|
||||
}
|
||||
|
||||
eventStats.WithLabelValues("gauge").Inc()
|
||||
} else {
|
||||
log.Debugf(regErrF, metricName, err)
|
||||
conflictingEventStats.WithLabelValues("gauge").Inc()
|
||||
}
|
||||
|
||||
case *TimerEvent:
|
||||
t := mapper.TimerTypeDefault
|
||||
if mapping != nil {
|
||||
t = mapping.TimerType
|
||||
}
|
||||
if t == mapper.TimerTypeDefault {
|
||||
t = b.mapper.Defaults.TimerType
|
||||
}
|
||||
|
||||
switch t {
|
||||
case mapper.TimerTypeHistogram:
|
||||
histogram, err := b.Histograms.Get(
|
||||
metricName,
|
||||
prometheusLabels,
|
||||
help,
|
||||
mapping,
|
||||
)
|
||||
if err == nil {
|
||||
histogram.Observe(event.Value() / 1000) // prometheus presumes seconds, statsd millisecond
|
||||
eventStats.WithLabelValues("timer").Inc()
|
||||
} else {
|
||||
log.Debugf(regErrF, metricName, err)
|
||||
conflictingEventStats.WithLabelValues("timer").Inc()
|
||||
}
|
||||
|
||||
case mapper.TimerTypeDefault, mapper.TimerTypeSummary:
|
||||
summary, err := b.Summaries.Get(
|
||||
metricName,
|
||||
prometheusLabels,
|
||||
help,
|
||||
mapping,
|
||||
)
|
||||
if err == nil {
|
||||
summary.Observe(event.Value())
|
||||
eventStats.WithLabelValues("timer").Inc()
|
||||
} else {
|
||||
log.Debugf(regErrF, metricName, err)
|
||||
conflictingEventStats.WithLabelValues("timer").Inc()
|
||||
}
|
||||
|
||||
default:
|
||||
panic(fmt.Sprintf("unknown timer type '%s'", t))
|
||||
}
|
||||
|
||||
default:
|
||||
log.Debugln("Unsupported event type")
|
||||
eventStats.WithLabelValues("illegal").Inc()
|
||||
}
|
||||
}
|
||||
|
||||
func NewExporter(mapper *mapper.MetricMapper) *Exporter {
|
||||
return &Exporter{
|
||||
Counters: NewCounterContainer(),
|
||||
|
|
|
|||
Loading…
Reference in a new issue