metrics-clojure / src / metrics / histograms.clj

Steve Losh caf4e68 

Steve Losh aa3e7bf 

Steve Losh caf4e68 

Steve Losh aa3e7bf 
Steve Losh caf4e68 




Steve Losh aa3e7bf 




























Steve Losh caf4e68 
Steve Losh aa3e7bf 


Steve Losh caf4e68 
Steve Losh aa3e7bf 



(ns metrics.histograms
  (use [metrics.utils :only (metric-name)])
  (import (com.yammer.metrics Metrics))
  (import (com.yammer.metrics.core HistogramMetric)))


; Create ----------------------------------------------------------------------
(defn histogram
  ([title] (histogram title false))
  ([title biased]
   (Metrics/newHistogram (metric-name title) biased)))


; Read ------------------------------------------------------------------------
(defn mean [^HistogramMetric h]
  (.mean h))

(defn std-dev [^HistogramMetric h]
  (.stdDev h))

(defn percentiles
  ([^HistogramMetric h]
   (percentiles h [0.75 0.90 0.95 1.0]))
  ([^HistogramMetric h ps]
   (zipmap ps
           (.percentiles h (double-array ps)))))

(defn number-recorded [^HistogramMetric h]
  (.count h))

(defn largest [^HistogramMetric h]
  (.max h))

(defn smallest [^HistogramMetric h]
  (.min h))

(defn sample [^HistogramMetric h]
  (.values h))


; Write -----------------------------------------------------------------------
(defn update!
  ([^HistogramMetric h] (update! h 1))
  ([^HistogramMetric h n]
   (.update h (long n))
   h))

(defn clear! [^HistogramMetric h]
  (.clear h)
  h)
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