| // Licensed to 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. Apache Software Foundation (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 prometheus |
| |
| import ( |
| "github.com/apache/skywalking-satellite/internal/satellite/telemetry" |
| |
| "github.com/prometheus/client_golang/prometheus" |
| ) |
| |
| type Gauge struct { |
| Collector |
| name string |
| gauge prometheus.GaugeFunc |
| } |
| |
| type DynamicGauge struct { |
| Collector |
| name string |
| gauge *prometheus.GaugeVec |
| } |
| |
| func (s *Server) NewGauge(name, help string, getter func() float64, labels ...string) telemetry.Gauge { |
| s.lock.Lock() |
| defer s.lock.Unlock() |
| rebuildName := rebuildGaugeName(name, labels...) |
| constLabels := make(map[string]string) |
| for inx := 0; inx < len(labels); inx += 2 { |
| constLabels[labels[inx]] = labels[inx+1] |
| } |
| collector, ok := s.collectorContainer[rebuildName] |
| if !ok { |
| gauge := &Gauge{ |
| name: name, |
| gauge: prometheus.NewGaugeFunc(prometheus.GaugeOpts{ |
| Name: name, |
| Help: help, |
| ConstLabels: constLabels, |
| }, getter), |
| } |
| s.Register(s.WithMeta(rebuildName, gauge.gauge)) |
| s.collectorContainer[rebuildName] = gauge |
| collector = gauge |
| } |
| return collector |
| } |
| |
| func (s *Server) NewDynamicGauge(name, help string, labels ...string) telemetry.DynamicGauge { |
| s.lock.Lock() |
| defer s.lock.Unlock() |
| rebuildName := rebuildGaugeName(name, labels...) |
| collector, ok := s.collectorContainer[rebuildName] |
| if !ok { |
| gauge := &DynamicGauge{ |
| name: name, |
| gauge: prometheus.NewGaugeVec(prometheus.GaugeOpts{ |
| Name: name, |
| Help: help, |
| }, labels), |
| } |
| s.Register(s.WithMeta(rebuildName, gauge.gauge)) |
| s.collectorContainer[rebuildName] = gauge |
| collector = gauge |
| } |
| return collector.(telemetry.DynamicGauge) |
| } |
| |
| func (i *DynamicGauge) Inc(labels ...string) { |
| i.gauge.WithLabelValues(labels...).Inc() |
| } |
| |
| func (i *DynamicGauge) Dec(labels ...string) { |
| i.gauge.WithLabelValues(labels...).Dec() |
| } |
| |
| func rebuildGaugeName(name string, labels ...string) string { |
| resultName := name |
| for inx := 0; inx < len(labels); inx++ { |
| resultName += "_" + labels[inx] |
| } |
| |
| return resultName |
| } |