func (r *requestContext) recordStats(statter statsd.Statter) {
prefix := strings.Join([]string{
r.Method,
strings.Replace(r.Endpoint, ".", "_", -1),
strconv.Itoa(r.Status),
}, ".")
for stat, duration := range r.Timers {
statter.Timing(prefix+"."+stat, duration.Nanoseconds(), 0.1)
}
if r.BadClient {
// We expect these to be infrequent. We may want to decreate this
// if it turns out not to be the case
statter.Inc("bad_client", 1, 1.0)
}
}
func test(target string, s statsd.Statter, debug bool) {
tuple := strings.Split(target, ":")
host := tuple[0]
port := tuple[1]
subhost := strings.Replace(host, ".", "_", -1)
pre := time.Now()
conn, err := net.Dial("tcp", target)
if err != nil {
if debug {
fmt.Println("connect error:", subhost, port)
}
s.Inc(fmt.Sprintf("%s.%s.dial_failed", subhost, port), 1, 1)
return
}
conn.Close()
duration := time.Since(pre)
ms := int64(duration / time.Millisecond)
if debug {
fmt.Printf("%s.%s.duration %d\n", subhost, port, ms)
}
s.Timing(fmt.Sprintf("%s.%s", subhost, port), ms, 1)
}
// ProfileCmd runs forever, sending Go runtime statistics to StatsD.
func ProfileCmd(stats statsd.Statter) {
c := time.Tick(1 * time.Second)
for range c {
var memoryStats runtime.MemStats
runtime.ReadMemStats(&memoryStats)
stats.Gauge("Gostats.Goroutines", int64(runtime.NumGoroutine()), 1.0)
stats.Gauge("Gostats.Heap.Alloc", int64(memoryStats.HeapAlloc), 1.0)
stats.Gauge("Gostats.Heap.Objects", int64(memoryStats.HeapObjects), 1.0)
stats.Gauge("Gostats.Heap.Idle", int64(memoryStats.HeapIdle), 1.0)
stats.Gauge("Gostats.Heap.InUse", int64(memoryStats.HeapInuse), 1.0)
stats.Gauge("Gostats.Heap.Released", int64(memoryStats.HeapReleased), 1.0)
// Calculate average and last and convert from nanoseconds to milliseconds
gcPauseAvg := (int64(memoryStats.PauseTotalNs) / int64(len(memoryStats.PauseNs))) / 1000000
lastGC := int64(memoryStats.PauseNs[(memoryStats.NumGC+255)%256]) / 1000000
stats.Timing("Gostats.Gc.PauseAvg", gcPauseAvg, 1.0)
stats.Gauge("Gostats.Gc.LastPauseTook", lastGC, 1.0)
stats.Gauge("Gostats.Gc.NextAt", int64(memoryStats.NextGC), 1.0)
}
}
func main() {
// command line flags
var opts struct {
HostPort string `long:"host" default:"127.0.0.1:8125" description:"host:port of statsd server"`
Prefix string `long:"prefix" default:"test-client" description:"Statsd prefix"`
StatType string `long:"type" default:"count" description:"stat type to send. Can be timing, count, guage"`
StatValue int64 `long:"value" default:"1" description:"Value to send"`
Name string `short:"n" long:"name" default:"counter" description:"stat name"`
Rate float32 `short:"r" long:"rate" default:"1.0" description:"sample rate"`
Volume int `short:"c" long:"count" default:"1000" description:"Number of stats to send. Volume."`
Noop bool `long:"noop" default:"false" description:"Use noop client"`
Duration time.Duration `short:"d" long:"duration" default:"10s" description:"How long to spread the volume across. Each second of duration volume/seconds events will be sent."`
}
// parse said flags
_, err := flags.Parse(&opts)
if err != nil {
if e, ok := err.(*flags.Error); ok {
if e.Type == flags.ErrHelp {
os.Exit(0)
}
}
fmt.Printf("Error: %+v\n", err)
os.Exit(1)
}
var client statsd.Statter
if !opts.Noop {
client, err = statsd.New(opts.HostPort, opts.Prefix)
if err != nil {
log.Fatal(err)
}
defer client.Close()
} else {
client, err = statsd.NewNoop(opts.HostPort, opts.Prefix)
}
var stat func(stat string, value int64, rate float32) error
switch opts.StatType {
case "count":
stat = func(stat string, value int64, rate float32) error {
return client.Inc(stat, value, rate)
}
case "gauge":
stat = func(stat string, value int64, rate float32) error {
return client.Gauge(stat, value, rate)
}
case "timing":
stat = func(stat string, value int64, rate float32) error {
return client.Timing(stat, value, rate)
}
default:
log.Fatal("Unsupported state type")
}
pertick := opts.Volume / int(opts.Duration.Seconds()) / 10
// add some extra tiem, because the first tick takes a while
ender := time.After(opts.Duration + 100*time.Millisecond)
c := time.Tick(time.Second / 10)
count := 0
for {
select {
case <-c:
for x := 0; x < pertick; x++ {
err := stat(opts.Name, opts.StatValue, opts.Rate)
if err != nil {
log.Printf("Got Error: %+v", err)
break
}
count += 1
}
case <-ender:
log.Printf("%d events called", count)
os.Exit(0)
return
}
}
}
