add a generic Debug() function to the connection tracer

integrationtests/self/key_update_test.go

@@ -89,6 +89,7 @@ func (t *connTracer) DroppedKey(logging.KeyPhase)
 func (t *connTracer) SetLossTimer(logging.TimerType, logging.EncryptionLevel, time.Time) {}
 func (t *connTracer) LossTimerExpired(logging.TimerType, logging.EncryptionLevel)        {}
 func (t *connTracer) LossTimerCanceled()                                                 {}
+func (t *connTracer) Debug(string, string)                                               {}
 func (t *connTracer) Close()                                                             {}
 
 var _ = Describe("Key Update tests", func() {

logging/interface.go

@@ -126,4 +126,5 @@ type ConnectionTracer interface {
 	LossTimerCanceled()
 	// Close is called when the connection is closed.
 	Close()
+	Debug(name, msg string)
 }

logging/multiplex.go

@@ -186,6 +186,12 @@ func (m *connTracerMultiplexer) LossTimerCanceled() {
 	}
 }
 
+func (m *connTracerMultiplexer) Debug(name, msg string) {
+	for _, t := range m.tracers {
+		t.Debug(name, msg)
+	}
+}
+
 func (m *connTracerMultiplexer) Close() {
 	for _, t := range m.tracers {
 		t.Close()

metrics/metrics.go

@@ -218,4 +218,5 @@ func (t *connTracer) DroppedKey(logging.KeyPhase)
 func (t *connTracer) SetLossTimer(logging.TimerType, logging.EncryptionLevel, time.Time) {}
 func (t *connTracer) LossTimerExpired(logging.TimerType, logging.EncryptionLevel)        {}
 func (t *connTracer) LossTimerCanceled()                                                 {}
+func (t *connTracer) Debug(string, string)                                               {}
 func (t *connTracer) Close()                                                             {}

qlog/event.go

@@ -462,3 +462,16 @@ func (e eventCongestionStateUpdated) IsNil() bool        { return false }
 func (e eventCongestionStateUpdated) MarshalJSONObject(enc *gojay.Encoder) {
 	enc.StringKey("new", e.state.String())
 }
+
+type eventGeneric struct {
+	name string
+	msg  string
+}
+
+func (e eventGeneric) Category() category { return categoryTransport }
+func (e eventGeneric) Name() string       { return e.name }
+func (e eventGeneric) IsNil() bool        { return false }
+
+func (e eventGeneric) MarshalJSONObject(enc *gojay.Encoder) {
+	enc.StringKey("details", e.msg)
+}

qlog/qlog.go

@@ -417,3 +417,12 @@ func (t *connectionTracer) LossTimerCanceled() {
 	t.recordEvent(time.Now(), &eventLossTimerCanceled{})
 	t.mutex.Unlock()
 }
+
+func (t *connectionTracer) Debug(name, msg string) {
+	t.mutex.Lock()
+	t.recordEvent(time.Now(), &eventGeneric{
+		name: name,
+		msg:  msg,
+	})
+	t.mutex.Unlock()
+}

qlog/qlog_test.go

@@ -698,6 +698,17 @@ var _ = Describe("Tracing", func() {
 				Expect(ev).To(HaveLen(1))
 				Expect(ev).To(HaveKeyWithValue("event_type", "cancelled"))
 			})
+
+			It("records a generic event", func() {
+				tracer.Debug("foo", "bar")
+				entry := exportAndParseSingle()
+				Expect(entry.Time).To(BeTemporally("~", time.Now(), scaleDuration(10*time.Millisecond)))
+				Expect(entry.Category).To(Equal("transport"))
+				Expect(entry.Name).To(Equal("foo"))
+				ev := entry.Event
+				Expect(ev).To(HaveLen(1))
+				Expect(ev).To(HaveKeyWithValue("details", "bar"))
+			})
 		})
 	})
 })