| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package metric |
| |
| import ( |
| dto "github.com/prometheus/client_model/go" |
| ) |
| |
| var ( |
| DefaultCalculator Calculator = &CommonCalculator{} |
| ) |
| |
| // Calculator is the interface to implement customize algorithm of MetricFamily |
| type Calculator interface { |
| Calc(mf *dto.MetricFamily) *Details |
| } |
| |
| type CommonCalculator struct { |
| } |
| |
| // Get value of metricFamily |
| func (c *CommonCalculator) Calc(mf *dto.MetricFamily) *Details { |
| if len(mf.GetMetric()) == 0 { |
| return nil |
| } |
| |
| details := NewDetails() |
| switch mf.GetType() { |
| case dto.MetricType_GAUGE: |
| metricGaugeOf(details, mf.GetMetric()) |
| case dto.MetricType_COUNTER: |
| metricCounterOf(details, mf.GetMetric()) |
| case dto.MetricType_SUMMARY: |
| metricSummaryOf(details, mf.GetMetric()) |
| case dto.MetricType_HISTOGRAM: |
| metricHistogramOf(details, mf.GetMetric()) |
| } |
| return details |
| } |
| |
| func metricGaugeOf(details *Details, m []*dto.Metric) { |
| for _, d := range m { |
| details.Summary += d.GetGauge().GetValue() |
| details.put(d.GetLabel(), d.GetGauge().GetValue()) |
| } |
| } |
| |
| func metricCounterOf(details *Details, m []*dto.Metric) { |
| for _, d := range m { |
| details.Summary += d.GetCounter().GetValue() |
| details.put(d.GetLabel(), d.GetCounter().GetValue()) |
| } |
| } |
| |
| func metricSummaryOf(details *Details, m []*dto.Metric) { |
| var ( |
| count uint64 = 0 |
| sum float64 = 0 |
| ) |
| for _, d := range m { |
| count += d.GetSummary().GetSampleCount() |
| sum += d.GetSummary().GetSampleSum() |
| details.put(d.GetLabel(), d.GetSummary().GetSampleSum()/float64(d.GetSummary().GetSampleCount())) |
| } |
| |
| if count == 0 { |
| return |
| } |
| |
| details.Summary = sum / float64(count) |
| } |
| |
| func metricHistogramOf(details *Details, m []*dto.Metric) { |
| var ( |
| count uint64 = 0 |
| sum float64 = 0 |
| ) |
| for _, d := range m { |
| count += d.GetHistogram().GetSampleCount() |
| sum += d.GetHistogram().GetSampleSum() |
| details.put(d.GetLabel(), d.GetHistogram().GetSampleSum()/float64(d.GetHistogram().GetSampleCount())) |
| } |
| |
| if count == 0 { |
| return |
| } |
| |
| details.Summary = sum / float64(count) |
| } |
| |
| func RegisterCalculator(c Calculator) { |
| DefaultCalculator = c |
| } |
| |
| func Calculate(mf *dto.MetricFamily) *Details { |
| return DefaultCalculator.Calc(mf) |
| } |