mirror of
https://github.com/42wim/matterbridge.git
synced 2024-12-24 20:22:39 +01:00
118 lines
3.6 KiB
Go
118 lines
3.6 KiB
Go
package logr
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/wiggin77/merror"
|
|
)
|
|
|
|
const (
|
|
DefMetricsUpdateFreqMillis = 15000 // 15 seconds
|
|
)
|
|
|
|
// Counter is a simple metrics sink that can only increment a value.
|
|
// Implementations are external to Logr and provided via `MetricsCollector`.
|
|
type Counter interface {
|
|
// Inc increments the counter by 1. Use Add to increment it by arbitrary non-negative values.
|
|
Inc()
|
|
// Add adds the given value to the counter. It panics if the value is < 0.
|
|
Add(float64)
|
|
}
|
|
|
|
// Gauge is a simple metrics sink that can receive values and increase or decrease.
|
|
// Implementations are external to Logr and provided via `MetricsCollector`.
|
|
type Gauge interface {
|
|
// Set sets the Gauge to an arbitrary value.
|
|
Set(float64)
|
|
// Add adds the given value to the Gauge. (The value can be negative, resulting in a decrease of the Gauge.)
|
|
Add(float64)
|
|
// Sub subtracts the given value from the Gauge. (The value can be negative, resulting in an increase of the Gauge.)
|
|
Sub(float64)
|
|
}
|
|
|
|
// MetricsCollector provides a way for users of this Logr package to have metrics pushed
|
|
// in an efficient way to any backend, e.g. Prometheus.
|
|
// For each target added to Logr, the supplied MetricsCollector will provide a Gauge
|
|
// and Counters that will be called frequently as logging occurs.
|
|
type MetricsCollector interface {
|
|
// QueueSizeGauge returns a Gauge that will be updated by the named target.
|
|
QueueSizeGauge(target string) (Gauge, error)
|
|
// LoggedCounter returns a Counter that will be incremented by the named target.
|
|
LoggedCounter(target string) (Counter, error)
|
|
// ErrorCounter returns a Counter that will be incremented by the named target.
|
|
ErrorCounter(target string) (Counter, error)
|
|
// DroppedCounter returns a Counter that will be incremented by the named target.
|
|
DroppedCounter(target string) (Counter, error)
|
|
// BlockedCounter returns a Counter that will be incremented by the named target.
|
|
BlockedCounter(target string) (Counter, error)
|
|
}
|
|
|
|
// TargetWithMetrics is a target that provides metrics.
|
|
type TargetWithMetrics interface {
|
|
EnableMetrics(collector MetricsCollector, updateFreqMillis int64) error
|
|
}
|
|
|
|
func (logr *Logr) getMetricsCollector() MetricsCollector {
|
|
logr.mux.RLock()
|
|
defer logr.mux.RUnlock()
|
|
return logr.metrics
|
|
}
|
|
|
|
// SetMetricsCollector enables metrics collection by supplying a MetricsCollector.
|
|
// The MetricsCollector provides counters and gauges that are updated by log targets.
|
|
func (logr *Logr) SetMetricsCollector(collector MetricsCollector) error {
|
|
if collector == nil {
|
|
return errors.New("collector cannot be nil")
|
|
}
|
|
|
|
logr.mux.Lock()
|
|
logr.metrics = collector
|
|
logr.queueSizeGauge, _ = collector.QueueSizeGauge("_logr")
|
|
logr.loggedCounter, _ = collector.LoggedCounter("_logr")
|
|
logr.errorCounter, _ = collector.ErrorCounter("_logr")
|
|
logr.mux.Unlock()
|
|
|
|
logr.metricsInitOnce.Do(func() {
|
|
logr.metricsDone = make(chan struct{})
|
|
go logr.startMetricsUpdater()
|
|
})
|
|
|
|
merr := merror.New()
|
|
|
|
logr.tmux.RLock()
|
|
defer logr.tmux.RUnlock()
|
|
for _, target := range logr.targets {
|
|
if tm, ok := target.(TargetWithMetrics); ok {
|
|
if err := tm.EnableMetrics(collector, logr.MetricsUpdateFreqMillis); err != nil {
|
|
merr.Append(err)
|
|
}
|
|
}
|
|
|
|
}
|
|
return merr.ErrorOrNil()
|
|
}
|
|
|
|
func (logr *Logr) setQueueSizeGauge(val float64) {
|
|
logr.mux.RLock()
|
|
defer logr.mux.RUnlock()
|
|
if logr.queueSizeGauge != nil {
|
|
logr.queueSizeGauge.Set(val)
|
|
}
|
|
}
|
|
|
|
func (logr *Logr) incLoggedCounter() {
|
|
logr.mux.RLock()
|
|
defer logr.mux.RUnlock()
|
|
if logr.loggedCounter != nil {
|
|
logr.loggedCounter.Inc()
|
|
}
|
|
}
|
|
|
|
func (logr *Logr) incErrorCounter() {
|
|
logr.mux.RLock()
|
|
defer logr.mux.RUnlock()
|
|
if logr.errorCounter != nil {
|
|
logr.errorCounter.Inc()
|
|
}
|
|
}
|