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// SPDX-License-Identifier: GPL-3.0-or-later
package pulsar
import (
"errors"
"strings"
"github.com/netdata/netdata/go/go.d.plugin/pkg/prometheus"
"github.com/netdata/netdata/go/go.d.plugin/pkg/stm"
)
func isValidPulsarMetrics(pms prometheus.Series) bool {
return pms.FindByName(metricPulsarTopicsCount).Len() > 0
}
func (p *Pulsar) resetCurCache() {
for ns := range p.curCache.namespaces {
delete(p.curCache.namespaces, ns)
}
for top := range p.curCache.topics {
delete(p.curCache.topics, top)
}
}
func (p *Pulsar) collect() (map[string]int64, error) {
pms, err := p.prom.ScrapeSeries()
if err != nil {
return nil, err
}
if !isValidPulsarMetrics(pms) {
return nil, errors.New("returned metrics aren't Apache Pulsar metrics")
}
p.once.Do(func() {
p.adjustCharts(pms)
})
mx := p.collectMetrics(pms)
p.updateCharts()
p.resetCurCache()
return stm.ToMap(mx), nil
}
func (p *Pulsar) collectMetrics(pms prometheus.Series) map[string]float64 {
mx := make(map[string]float64)
p.collectBroker(mx, pms)
return mx
}
func (p *Pulsar) collectBroker(mx map[string]float64, pms prometheus.Series) {
pms = findPulsarMetrics(pms)
for _, pm := range pms {
ns, top := newNamespace(pm), newTopic(pm)
if ns.name == "" {
continue
}
p.curCache.namespaces[ns] = true
value := pm.Value * precision(pm.Name())
mx[pm.Name()] += value
mx[pm.Name()+"_"+ns.name] += value
if top.name == "" || !p.topicFilter.MatchString(top.name) {
continue
}
p.curCache.topics[top] = true
mx[pm.Name()+"_"+top.name] += value
}
mx["pulsar_namespaces_count"] = float64(len(p.curCache.namespaces))
}
func newNamespace(pm prometheus.SeriesSample) namespace {
return namespace{
name: pm.Labels.Get("namespace"),
}
}
func newTopic(pm prometheus.SeriesSample) topic {
return topic{
namespace: pm.Labels.Get("namespace"),
name: pm.Labels.Get("topic"),
}
}
func findPulsarMetrics(pms prometheus.Series) prometheus.Series {
var ms prometheus.Series
for _, pm := range pms {
if isPulsarHistogram(pm) {
ms = append(ms, pm)
}
}
pms = pms.FindByNames(
metricPulsarTopicsCount,
metricPulsarSubscriptionDelayed,
metricPulsarSubscriptionsCount,
metricPulsarProducersCount,
metricPulsarConsumersCount,
metricPulsarRateIn,
metricPulsarRateOut,
metricPulsarThroughputIn,
metricPulsarThroughputOut,
metricPulsarStorageSize,
metricPulsarStorageWriteRate,
metricPulsarStorageReadRate,
metricPulsarMsgBacklog,
metricPulsarSubscriptionMsgRateRedeliver,
metricPulsarSubscriptionBlockedOnUnackedMessages,
)
return append(ms, pms...)
}
func isPulsarHistogram(pm prometheus.SeriesSample) bool {
s := pm.Name()
return strings.HasPrefix(s, "pulsar_storage_write_latency") || strings.HasPrefix(s, "pulsar_entry_size")
}
func precision(metric string) float64 {
switch metric {
case metricPulsarRateIn,
metricPulsarRateOut,
metricPulsarThroughputIn,
metricPulsarThroughputOut,
metricPulsarStorageWriteRate,
metricPulsarStorageReadRate,
metricPulsarSubscriptionMsgRateRedeliver,
metricPulsarReplicationRateIn,
metricPulsarReplicationRateOut,
metricPulsarReplicationThroughputIn,
metricPulsarReplicationThroughputOut:
return 1000
}
return 1
}
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