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logger_sampling.go
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logger_sampling.go
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package log
import (
"context"
"sync"
"time"
"github.com/justtrackio/gosoline/pkg/clock"
)
type SamplingLogger struct {
Logger
clock clock.Clock
logs *sync.Map
interval time.Duration
}
func NewSamplingLogger(logger Logger, interval time.Duration) Logger {
testClock := clock.NewRealClock()
return NewSamplingLoggerWithInterfaces(logger, testClock, interval)
}
func NewSamplingLoggerWithInterfaces(logger Logger, clock clock.Clock, interval time.Duration) *SamplingLogger {
return &SamplingLogger{
Logger: logger,
clock: clock,
logs: &sync.Map{},
interval: interval,
}
}
func (l *SamplingLogger) copy(logger Logger) *SamplingLogger {
return &SamplingLogger{
Logger: logger,
clock: l.clock,
logs: l.logs,
interval: l.interval,
}
}
func (l *SamplingLogger) WithChannel(channel string) Logger {
logger := l.Logger.WithChannel(channel)
return l.copy(logger)
}
func (l *SamplingLogger) WithContext(ctx context.Context) Logger {
logger := l.Logger.WithContext(ctx)
return l.copy(logger)
}
func (l *SamplingLogger) WithFields(fields Fields) Logger {
logger := l.Logger.WithFields(fields)
return l.copy(logger)
}
func (l *SamplingLogger) Debug(msg string, args ...interface{}) {
if !l.shouldLog(msg) {
return
}
l.Logger.Debug(msg, args...)
}
func (l *SamplingLogger) Error(msg string, args ...interface{}) {
if !l.shouldLog(msg) {
return
}
l.Logger.Error(msg, args...)
}
func (l *SamplingLogger) Info(msg string, args ...interface{}) {
if !l.shouldLog(msg) {
return
}
l.Logger.Info(msg, args...)
}
func (l *SamplingLogger) Warn(msg string, args ...interface{}) {
if !l.shouldLog(msg) {
return
}
l.Logger.Warn(msg, args...)
}
func (l *SamplingLogger) shouldLog(msg string) bool {
value, ok := l.logs.Load(msg)
if !ok {
lastLoggedAt := l.clock.Now()
l.logs.Store(msg, &lastLoggedAt)
return true
}
lastLoggedAt := value.(*time.Time)
shouldLogAgainAt := lastLoggedAt.Add(l.interval)
if shouldLogAgainAt.UnixNano() >= l.clock.Now().UnixNano() {
return false
}
newLastLoggedAt := l.clock.Now()
l.logs.Store(msg, &newLastLoggedAt)
return true
}