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feat(go): expose async sink publish latency histogram

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lingniu
2026-07-03 19:02:24 +08:00
parent 018015f9de
commit afb301cb7a
6 changed files with 15 additions and 2 deletions
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6
go/vehicle-gateway/internal/eventbus/async_sink.go
View File

@@ -40,6 +40,8 @@ type asyncJob struct {
var ErrAsyncSinkClosed = errors.New("async sink is closed")
var asyncSinkPublishDurationBucketsMS = []float64{1, 5, 10, 25, 50, 100, 250, 500, 1000, 5000}
func NewAsyncSink(delegate Sink, cfg AsyncConfig) *AsyncSink {
if delegate == nil {
panic("async delegate sink must not be nil")
@@ -169,7 +171,9 @@ func (s *AsyncSink) recordPublish(kind string, status string, elapsed time.Durat
"status": status,
}
s.metrics.IncCounter("vehicle_async_sink_publish_total", labels)
s.metrics.SetGauge("vehicle_async_sink_publish_duration_ms", labels, float64(elapsed.Milliseconds()))
elapsedMS := float64(elapsed.Milliseconds())
s.metrics.SetGauge("vehicle_async_sink_publish_duration_ms", labels, elapsedMS)
s.metrics.ObserveHistogram("vehicle_async_sink_publish_duration_ms_histogram", labels, asyncSinkPublishDurationBucketsMS, elapsedMS)
}
func (s *AsyncSink) recordQueueDepth() {

3
go/vehicle-gateway/internal/eventbus/async_sink_test.go
View File

@@ -83,6 +83,9 @@ func TestAsyncSinkRecordsQueueMetrics(t *testing.T) {
`vehicle_async_sink_queue_depth{sink="nats"}`,
`vehicle_async_sink_publish_total{kind="raw",sink="nats",status="ok"} 1`,
`vehicle_async_sink_publish_total{kind="fields",sink="nats",status="ok"} 1`,
`vehicle_async_sink_publish_duration_ms_histogram_bucket{le="+Inf",kind="raw",sink="nats",status="ok"} 1`,
`vehicle_async_sink_publish_duration_ms_histogram_count{kind="raw",sink="nats",status="ok"} 1`,
`vehicle_async_sink_publish_duration_ms_histogram_sum{kind="raw",sink="nats",status="ok"}`,
} {
if !strings.Contains(text, want) {
t.Fatalf("async sink metric missing %s:\n%s", want, text)