percentil: refactor

dist/datasource-zabbix/dataProcessor.js

@@ -3,7 +3,7 @@
 System.register(['lodash', './utils', './timeseries'], function (_export, _context) {
   "use strict";
 
-  var _, utils, ts, downsampleSeries, groupBy, groupBy_exported, sumSeries, delta, rate, scale, simpleMovingAverage, expMovingAverage, SUM, COUNT, AVERAGE, MIN, MAX, MEDIAN, metricFunctions, aggregationFunctions;
+  var _, utils, ts, downsampleSeries, groupBy, groupBy_exported, sumSeries, delta, rate, scale, simpleMovingAverage, expMovingAverage, SUM, COUNT, AVERAGE, MIN, MAX, MEDIAN, PERCENTIL, metricFunctions, aggregationFunctions;
 
   function limit(order, n, orderByFunc, timeseries) {
     var orderByCallback = aggregationFunctions[orderByFunc];
@@ -68,6 +68,12 @@ System.register(['lodash', './utils', './timeseries'], function (_export, _conte
     return groupBy(flattenedPoints, interval, groupByCallback);
   }
 
+  function percentil(interval, n, datapoints) {
+    var flattenedPoints = _.flatten(datapoints, true);
+    var groupByCallback = _.partial(PERCENTIL, n);
+    return groupBy(flattenedPoints, interval, groupByCallback);
+  }
+
   function timeShift(interval, range) {
     var shift = utils.parseTimeShiftInterval(interval) / 1000;
     return _.map(range, function (time) {
@@ -120,6 +126,7 @@ System.register(['lodash', './utils', './timeseries'], function (_export, _conte
       MIN = ts.MIN;
       MAX = ts.MAX;
       MEDIAN = ts.MEDIAN;
+      PERCENTIL = ts.PERCENTIL;
       metricFunctions = {
         groupBy: groupByWrapper,
         scale: scale,
@@ -129,6 +136,7 @@ System.register(['lodash', './utils', './timeseries'], function (_export, _conte
         exponentialMovingAverage: expMovingAverage,
         aggregateBy: aggregateByWrapper,
         // Predefined aggs
+        percentil: percentil,
         average: _.partial(aggregateWrapper, AVERAGE),
         min: _.partial(aggregateWrapper, MIN),
         max: _.partial(aggregateWrapper, MAX),

dist/datasource-zabbix/metricFunctions.js

@@ -148,6 +148,13 @@ System.register(['lodash', 'jquery'], function (_export, _context) {
         defaultParams: ['1m']
       });
 
+      addFuncDef({
+        name: 'percentil',
+        category: 'Aggregate',
+        params: [{ name: 'interval', type: 'string' }, { name: 'percent', type: 'float', options: [25, 50, 75, 90, 95, 99, 99.9] }],
+        defaultParams: ['1m', 95]
+      });
+
       addFuncDef({
         name: 'min',
         category: 'Aggregate',

dist/datasource-zabbix/timeseries.js

@@ -305,6 +305,11 @@ System.register(['lodash', './utils'], function (_export, _context) {
     return ema;
   }
 
+  function PERCENTIL(n, values) {
+    var sorted = _.sortBy(values);
+    return sorted[Math.floor(sorted.length * n / 100)];
+  }
+
   function COUNT(values) {
     return values.length;
   }
@@ -474,7 +479,8 @@ System.register(['lodash', './utils'], function (_export, _context) {
         AVERAGE: AVERAGE,
         MIN: MIN,
         MAX: MAX,
-        MEDIAN: MEDIAN
+        MEDIAN: MEDIAN,
+        PERCENTIL: PERCENTIL
       };
 
       _export('default', exportedFunctions);