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package leaf
import (
"fmt"
"os"
"time"
)
type samples struct {
num uint64 // number of samples
sum uint64 // total query time (ms)
min uint64 // minimum query time (ms)
max uint64 // maximum query time (ms)
}
func newSamples() samples {
return samples{min: 18446744073709551615}
}
func (s *samples) update(sample uint64) {
s.num += 1
s.sum += sample
if sample < s.min {
s.min = sample
}
if sample > s.max {
s.max = sample
}
}
func (s *samples) avg() uint64 {
if s.num == 0 {
return 0
}
return s.sum / s.num
}
type status struct {
start time.Time // time that measurement started
num3xx uint64 // number of 3xx responses since last status
num4xx uint64 // number of 4xx responses since last status
num5xx uint64 // number of 5xx responses since last status
status200 samples // info about 200 responses since last status
status202 samples // info about 202 responses since last status
}
func newStatus() status {
return status{
start: time.Now(),
status200: newSamples(),
status202: newSamples(),
}
}
func (s *status) reset() {
s.num3xx = 0
s.num4xx = 0
s.num5xx = 0
s.status200 = newSamples()
s.status202 = newSamples()
}
func (s *status) register(ev *event) {
s.num3xx += ev.num3xx
s.num4xx += ev.num4xx
s.num5xx += ev.num5xx
delay := uint64(ev.end.Sub(ev.start).Milliseconds())
if ev.got200 {
s.status200.update(delay)
} else {
s.status202.update(delay)
}
ev.resetCounters()
}
func (s *status) rotate(f *os.File) error {
str := fmt.Sprintf("%s ", time.Now().Format(time.RFC3339))
str += fmt.Sprintf("%d ", uint64(time.Now().Sub(s.start).Milliseconds()/1000))
str += fmt.Sprintf("%d ", s.status200.num)
str += fmt.Sprintf("%d ", s.status202.num)
str += fmt.Sprintf("%d ", s.num3xx)
str += fmt.Sprintf("%d ", s.num4xx)
str += fmt.Sprintf("%d ", s.num5xx)
str += fmt.Sprintf("%d ", s.status200.min)
str += fmt.Sprintf("%d ", s.status200.avg())
str += fmt.Sprintf("%d ", s.status200.max)
str += fmt.Sprintf("%d ", s.status202.min)
str += fmt.Sprintf("%d ", s.status202.avg())
str += fmt.Sprintf("%d\n", s.status202.max)
s.reset()
_, err := f.WriteString(str)
return err
}
func (s *status) format() string {
return "Time RelTime Num200 Num202 Num3xx Num4xx Num5xx Min200 Avg200 Max200 Min202 Avg202 Max202\n" +
" (s) ----> observed response delays (ms) <----"
}
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