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
|
package metrics_test
import (
"fmt"
"runtime"
"github.com/VictoriaMetrics/metrics"
)
func ExampleGauge() {
// Define a gauge exporting the number of goroutines.
var g = metrics.NewGauge(`goroutines_count`, func() float64 {
return float64(runtime.NumGoroutine())
})
// Obtain gauge value.
fmt.Println(g.Get())
}
func ExampleGauge_vec() {
for i := 0; i < 3; i++ {
// Dynamically construct metric name and pass it to GetOrCreateGauge.
name := fmt.Sprintf(`metric{label1=%q, label2="%d"}`, "value1", i)
iLocal := i
metrics.GetOrCreateGauge(name, func() float64 {
return float64(iLocal + 1)
})
}
// Read counter values.
for i := 0; i < 3; i++ {
name := fmt.Sprintf(`metric{label1=%q, label2="%d"}`, "value1", i)
n := metrics.GetOrCreateGauge(name, func() float64 { return 0 }).Get()
fmt.Println(n)
}
// Output:
// 1
// 2
// 3
}
|
