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package telemetry
import (
"context"
"log/slog"
"sync"
"aigw/internal/domain"
)
type UsageSink interface {
Publish(domain.UsageEvent)
}
type AsyncUsageLogger struct {
logger *slog.Logger
metrics *Metrics
events chan domain.UsageEvent
done chan struct{}
once sync.Once
}
func NewAsyncUsageLogger(logger *slog.Logger, metrics *Metrics, buffer int) *AsyncUsageLogger {
sink := &AsyncUsageLogger{
logger: logger,
metrics: metrics,
events: make(chan domain.UsageEvent, buffer),
done: make(chan struct{}),
}
go sink.run()
return sink
}
func (s *AsyncUsageLogger) Publish(event domain.UsageEvent) {
select {
case s.events <- event:
default:
s.metrics.UsageDropped()
}
}
func (s *AsyncUsageLogger) Close(ctx context.Context) error {
s.once.Do(func() { close(s.events) })
select {
case <-s.done:
return nil
case <-ctx.Done():
return ctx.Err()
}
}
func (s *AsyncUsageLogger) run() {
defer close(s.done)
for event := range s.events {
s.logger.Info("usage_event", "event", event)
}
}
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