var getAllHostData = function()

in ambari-metrics-grafana/ambari-metrics/datasource.js [292:328]
37 lines of code
16 McCabe index (conditional complexity)

        var getAllHostData = function (target) {
          var instanceId = typeof target.templatedCluster == 'undefined' ? '' : '&instanceId=' + target.templatedCluster;
          var appId = target.app;
          if ((appId === 'nifi' || appId === 'druid') && (!instanceId || instanceId === '&instanceId=')) {
            instanceId = "&instanceId=%"
          }
          var precision = target.precision === 'default' || typeof target.precision == 'undefined' ? '' : '&precision='
            + target.precision;
          var metricAggregator = target.aggregator === "none" ? '' : '._' + target.aggregator;
          var topN = "";
          var isBottomN = "";
          if (!_.isEmpty(templateSrv.variables.filter(function (o) {
            return o.name === "instances";
          }))) {
            var metricTopN = _.filter(templateSrv.variables, function (o) {
              return o.name === "instances";
            });
            var metricTopAgg = _.filter(templateSrv.variables, function (o) {
              return o.name === "topagg";
            });
            isBottomN = templateSrv.variables.filter(function (o) {
              return o.name === "orientation";
            })[0].current.value
            === "bottom" ? true : false;
            topN = '&topN=' + metricTopN[0].current.value + '&topNFunction=' + metricTopAgg[0].current.value + '&isBottomN=' + isBottomN;
          }
          var metricTransform = !target.transform || target.transform === "none" ? '' : '._' + target.transform;
          var seriesAggregator = !target.seriesAggregator || target.seriesAggregator === "none" ? '' : '&seriesAggregateFunction=' + target.seriesAggregator;
          var templatedComponent = (_.isEmpty(tComponent)) ? target.app : tComponent;
          return self.doAmbariRequest({
            url: 'metrics?metricNames=' + target.metric + metricTransform
            + metricAggregator + '&hostname=' + target.templatedHost + '&appId=' + templatedComponent + instanceId
            + '&startTime=' + from + '&endTime=' + to + precision + topN + seriesAggregator
          }).then(
            allHostMetricsData(target)
          );
        };