metrics-clojure / metrics-clojure-core / src / metrics / gauges.clj

Steve Losh 26d62ce 
Steve Losh 2bf9a78 
Steve Losh 26d62ce 























Steve Losh cf47ec1 
Steve Losh 2934725 
Ian Eure 27c731b 

Steve Losh 9f89ac1 

Steve Losh cf47ec1 
Steve Losh 2bf9a78 





Ian Eure 27c731b 
Steve Losh 26d62ce 





(ns metrics.gauges
  (:use [metrics.utils :only (metric-name desugared-title)])
  (:import (com.yammer.metrics Metrics))
  (:import (com.yammer.metrics.core Gauge)))


; Create ----------------------------------------------------------------------
(defmacro gauge
  "Create a new Gauge metric with the given title.

  The body exprs will be used to retrieve the value of the Gauge when requested."
  [title & body]
  `(Metrics/newGauge (metric-name ~title)
                     (proxy [Gauge] []
                       (value [] (do ~@body)))))

(defn gauge-fn
  "Create a new Gauge metric with the given title.

  The given function will be called (with no arguments) to retrieve the value of
  the Gauge when requested."
  [title f]
  (Metrics/newGauge (metric-name title)
                    (proxy [Gauge] []
                      (value [] (f)))))


(defmacro defgauge
  "Define a new Gauge metric with the given title.

  The rest of the arguments may be a body form or function to call to
  retrieve the value of the Gauge."
  [title & [b & bs :as body]]
  (let [[s title] (desugared-title title)]
    (if (and (empty? bs)
             (symbol? b)
             (fn? (eval b)))
      `(def ~s (gauge-fn ~title ~b))
      `(def ~s (gauge ~title ~@body)))))


; Read ------------------------------------------------------------------------
(defn value
  "Return the value of the given Gauge."
  [^Gauge g]
  (.value g))
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.