1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
package catfile
import (
"context"
"sync"
"github.com/opentracing/opentracing-go"
"github.com/prometheus/client_golang/prometheus"
"gitlab.com/gitlab-org/gitaly/v15/internal/tracing"
)
type trace struct {
span opentracing.Span
counter *prometheus.CounterVec
requestsLock sync.Mutex
requests map[string]int
}
// startTrace starts a new tracing span and updates metrics according to how many requests have been
// done during that trace. The caller must call `finish()` on the resulting after it's deemed to be
// done such that metrics get recorded correctly.
func startTrace(
ctx context.Context,
counter *prometheus.CounterVec,
methodName string,
) *trace {
var span opentracing.Span
if methodName == "" {
span = &tracing.NoopSpan{}
} else {
span, _ = tracing.StartSpanIfHasParent(ctx, methodName, nil)
}
trace := &trace{
span: span,
counter: counter,
requests: map[string]int{
"blob": 0,
"commit": 0,
"tree": 0,
"tag": 0,
"info": 0,
},
}
return trace
}
func (t *trace) recordRequest(requestType string) {
t.requestsLock.Lock()
defer t.requestsLock.Unlock()
t.requests[requestType]++
}
func (t *trace) finish() {
t.requestsLock.Lock()
defer t.requestsLock.Unlock()
for requestType, requestCount := range t.requests {
if requestCount == 0 {
continue
}
t.span.SetTag(requestType, requestCount)
if t.counter != nil {
t.counter.WithLabelValues(requestType).Add(float64(requestCount))
}
}
t.span.Finish()
}
|
