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package telemetry
import (
"fmt"
"net/http"
"sync/atomic"
)
type Metrics struct {
requests atomic.Uint64
failed atomic.Uint64
inFlight atomic.Int64
attempts atomic.Uint64
droppedUsage atomic.Uint64
}
func (m *Metrics) RequestStarted() {
m.requests.Add(1)
m.inFlight.Add(1)
}
func (m *Metrics) RequestFinished(success bool) {
m.inFlight.Add(-1)
if !success {
m.failed.Add(1)
}
}
func (m *Metrics) UpstreamAttempt() {
m.attempts.Add(1)
}
func (m *Metrics) UsageDropped() {
m.droppedUsage.Add(1)
}
func (m *Metrics) ServeHTTP(w http.ResponseWriter, _ *http.Request) {
w.Header().Set("Content-Type", "text/plain; version=0.0.4")
fmt.Fprintf(w, "# TYPE aigw_requests_total counter\naigw_requests_total %d\n", m.requests.Load())
fmt.Fprintf(w, "# TYPE aigw_requests_failed_total counter\naigw_requests_failed_total %d\n", m.failed.Load())
fmt.Fprintf(w, "# TYPE aigw_requests_in_flight gauge\naigw_requests_in_flight %d\n", m.inFlight.Load())
fmt.Fprintf(w, "# TYPE aigw_upstream_attempts_total counter\naigw_upstream_attempts_total %d\n", m.attempts.Load())
fmt.Fprintf(w, "# TYPE aigw_usage_events_dropped_total counter\naigw_usage_events_dropped_total %d\n", m.droppedUsage.Load())
}
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