percentil: refactor

dist/test/datasource-zabbix/dataProcessor.js

@@ -44,6 +44,7 @@ var AVERAGE = _timeseries2.default.AVERAGE;
 var MIN = _timeseries2.default.MIN;
 var MAX = _timeseries2.default.MAX;
 var MEDIAN = _timeseries2.default.MEDIAN;
+var PERCENTIL = _timeseries2.default.PERCENTIL;
 
 function limit(order, n, orderByFunc, timeseries) {
   var orderByCallback = aggregationFunctions[orderByFunc];
@@ -108,6 +109,12 @@ function aggregateWrapper(groupByCallback, interval, datapoints) {
   return groupBy(flattenedPoints, interval, groupByCallback);
 }
 
+function percentil(interval, n, datapoints) {
+  var flattenedPoints = _lodash2.default.flatten(datapoints, true);
+  var groupByCallback = _lodash2.default.partial(PERCENTIL, n);
+  return groupBy(flattenedPoints, interval, groupByCallback);
+}
+
 function timeShift(interval, range) {
   var shift = utils.parseTimeShiftInterval(interval) / 1000;
   return _lodash2.default.map(range, function (time) {
@@ -131,6 +138,7 @@ var metricFunctions = {
   exponentialMovingAverage: expMovingAverage,
   aggregateBy: aggregateByWrapper,
   // Predefined aggs
+  percentil: percentil,
   average: _lodash2.default.partial(aggregateWrapper, AVERAGE),
   min: _lodash2.default.partial(aggregateWrapper, MIN),
   max: _lodash2.default.partial(aggregateWrapper, MAX),

dist/test/datasource-zabbix/metricFunctions.js

@@ -111,6 +111,13 @@ addFuncDef({
   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/test/datasource-zabbix/timeseries.js

@@ -330,6 +330,11 @@ function expMovingAverage(datapoints, n) {
   return ema;
 }
 
+function PERCENTIL(n, values) {
+  var sorted = _lodash2.default.sortBy(values);
+  return sorted[Math.floor(sorted.length * n / 100)];
+}
+
 function COUNT(values) {
   return values.length;
 }
@@ -490,7 +495,8 @@ var exportedFunctions = {
   AVERAGE: AVERAGE,
   MIN: MIN,
   MAX: MAX,
-  MEDIAN: MEDIAN
+  MEDIAN: MEDIAN,
+  PERCENTIL: PERCENTIL
 };
 
 exports.default = exportedFunctions;