diff options
Diffstat (limited to 'Godeps/_workspace/src/github.com/rcrowley/go-metrics/exp/exp.go')
-rw-r--r-- | Godeps/_workspace/src/github.com/rcrowley/go-metrics/exp/exp.go | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/Godeps/_workspace/src/github.com/rcrowley/go-metrics/exp/exp.go b/Godeps/_workspace/src/github.com/rcrowley/go-metrics/exp/exp.go deleted file mode 100644 index 09a496f11..000000000 --- a/Godeps/_workspace/src/github.com/rcrowley/go-metrics/exp/exp.go +++ /dev/null @@ -1,148 +0,0 @@ -// Hook go-metrics into expvar -// on any /debug/metrics request, load all vars from the registry into expvar, and execute regular expvar handler -package exp - -import ( - "expvar" - "fmt" - "github.com/rcrowley/go-metrics" - "net/http" - "sync" -) - -type exp struct { - expvarLock sync.Mutex // expvar panics if you try to register the same var twice, so we must probe it safely - registry metrics.Registry -} - -func (exp *exp) expHandler(w http.ResponseWriter, r *http.Request) { - // load our variables into expvar - exp.syncToExpvar() - - // now just run the official expvar handler code (which is not publicly callable, so pasted inline) - w.Header().Set("Content-Type", "application/json; charset=utf-8") - fmt.Fprintf(w, "{\n") - first := true - expvar.Do(func(kv expvar.KeyValue) { - if !first { - fmt.Fprintf(w, ",\n") - } - first = false - fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value) - }) - fmt.Fprintf(w, "\n}\n") -} - -func Exp(r metrics.Registry) { - e := exp{sync.Mutex{}, r} - // this would cause a panic: - // panic: http: multiple registrations for /debug/vars - // http.HandleFunc("/debug/vars", e.expHandler) - // haven't found an elegant way, so just use a different endpoint - http.HandleFunc("/debug/metrics", e.expHandler) -} - -func (exp *exp) getInt(name string) *expvar.Int { - var v *expvar.Int - exp.expvarLock.Lock() - p := expvar.Get(name) - if p != nil { - v = p.(*expvar.Int) - } else { - v = new(expvar.Int) - expvar.Publish(name, v) - } - exp.expvarLock.Unlock() - return v -} - -func (exp *exp) getFloat(name string) *expvar.Float { - var v *expvar.Float - exp.expvarLock.Lock() - p := expvar.Get(name) - if p != nil { - v = p.(*expvar.Float) - } else { - v = new(expvar.Float) - expvar.Publish(name, v) - } - exp.expvarLock.Unlock() - return v -} - -func (exp *exp) publishCounter(name string, metric metrics.Counter) { - v := exp.getInt(name) - v.Set(metric.Count()) -} - -func (exp *exp) publishGauge(name string, metric metrics.Gauge) { - v := exp.getInt(name) - v.Set(metric.Value()) -} -func (exp *exp) publishGaugeFloat64(name string, metric metrics.GaugeFloat64) { - exp.getFloat(name).Set(metric.Value()) -} - -func (exp *exp) publishHistogram(name string, metric metrics.Histogram) { - h := metric.Snapshot() - ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999}) - exp.getInt(name + ".count").Set(h.Count()) - exp.getFloat(name + ".min").Set(float64(h.Min())) - exp.getFloat(name + ".max").Set(float64(h.Max())) - exp.getFloat(name + ".mean").Set(float64(h.Mean())) - exp.getFloat(name + ".std-dev").Set(float64(h.StdDev())) - exp.getFloat(name + ".50-percentile").Set(float64(ps[0])) - exp.getFloat(name + ".75-percentile").Set(float64(ps[1])) - exp.getFloat(name + ".95-percentile").Set(float64(ps[2])) - exp.getFloat(name + ".99-percentile").Set(float64(ps[3])) - exp.getFloat(name + ".999-percentile").Set(float64(ps[4])) -} - -func (exp *exp) publishMeter(name string, metric metrics.Meter) { - m := metric.Snapshot() - exp.getInt(name + ".count").Set(m.Count()) - exp.getFloat(name + ".one-minute").Set(float64(m.Rate1())) - exp.getFloat(name + ".five-minute").Set(float64(m.Rate5())) - exp.getFloat(name + ".fifteen-minute").Set(float64((m.Rate15()))) - exp.getFloat(name + ".mean").Set(float64(m.RateMean())) -} - -func (exp *exp) publishTimer(name string, metric metrics.Timer) { - t := metric.Snapshot() - ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999}) - exp.getInt(name + ".count").Set(t.Count()) - exp.getFloat(name + ".min").Set(float64(t.Min())) - exp.getFloat(name + ".max").Set(float64(t.Max())) - exp.getFloat(name + ".mean").Set(float64(t.Mean())) - exp.getFloat(name + ".std-dev").Set(float64(t.StdDev())) - exp.getFloat(name + ".50-percentile").Set(float64(ps[0])) - exp.getFloat(name + ".75-percentile").Set(float64(ps[1])) - exp.getFloat(name + ".95-percentile").Set(float64(ps[2])) - exp.getFloat(name + ".99-percentile").Set(float64(ps[3])) - exp.getFloat(name + ".999-percentile").Set(float64(ps[4])) - exp.getFloat(name + ".one-minute").Set(float64(t.Rate1())) - exp.getFloat(name + ".five-minute").Set(float64(t.Rate5())) - exp.getFloat(name + ".fifteen-minute").Set(float64((t.Rate15()))) - exp.getFloat(name + ".mean-rate").Set(float64(t.RateMean())) -} - -func (exp *exp) syncToExpvar() { - exp.registry.Each(func(name string, i interface{}) { - switch i.(type) { - case metrics.Counter: - exp.publishCounter(name, i.(metrics.Counter)) - case metrics.Gauge: - exp.publishGauge(name, i.(metrics.Gauge)) - case metrics.GaugeFloat64: - exp.publishGaugeFloat64(name, i.(metrics.GaugeFloat64)) - case metrics.Histogram: - exp.publishHistogram(name, i.(metrics.Histogram)) - case metrics.Meter: - exp.publishMeter(name, i.(metrics.Meter)) - case metrics.Timer: - exp.publishTimer(name, i.(metrics.Timer)) - default: - panic(fmt.Sprintf("unsupported type for '%s': %T", name, i)) - } - }) -} |