/
prom.go
54 lines (44 loc) · 1.16 KB
/
prom.go
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package main
import (
"bytes"
"fmt"
"os"
"strings"
"github.com/isucon/isucon11-final/benchmarker/scenario"
)
const promTagPrefix = "isucon11f_bench_"
type PromTags struct {
b bytes.Buffer
}
func (p *PromTags) writeTag(name string, value string, labelsAndValues ...string) {
if len(labelsAndValues)%2 != 0 {
panic("len(labelsAndValues) needs to be a multiple of 2")
}
var labels []string
for i := 0; i < len(labelsAndValues)/2; i++ {
labels = append(labels, fmt.Sprintf("%s=\"%s\"", labelsAndValues[i*2], labelsAndValues[i*2+1]))
}
_, _ = p.b.WriteString(fmt.Sprintf("%s%s{%s} %s\n", promTagPrefix, name, strings.Join(labels, ","), value))
}
func (p *PromTags) writePromFile() {
if len(promOut) == 0 {
return
}
promOutNew := fmt.Sprintf("%s.new", promOut)
err := os.WriteFile(promOutNew, p.b.Bytes(), 0644)
if err != nil {
scenario.AdminLogger.Printf("Failed to write prom file: %s", err)
return
}
}
func (p *PromTags) commit() {
if len(promOut) == 0 {
return
}
promOutNew := fmt.Sprintf("%s.new", promOut)
err := os.Rename(promOutNew, promOut)
if err != nil {
scenario.AdminLogger.Printf("Failed to write prom file: %s", err)
return
}
}