| /* |
| * 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 metrics |
| |
| import ( |
| "errors" |
| "net/http" |
| "sync" |
| "time" |
| ) |
| |
| var onceEnable sync.Once |
| |
| //PromRecorder record metrics |
| type PromRecorder struct { |
| LabelNames []string |
| } |
| |
| //NewPromRecorder return a prom recorder |
| func NewPromRecorder(opts *Options) (*PromRecorder, error) { |
| if opts != nil { |
| return &PromRecorder{LabelNames: opts.LabelNames}, nil |
| } |
| return nil, errors.New("options can not be nil") |
| } |
| |
| //RecordStatus record different metrics based on status |
| func (e *PromRecorder) RecordStatus(LabelValues map[string]string, statusCode int) { |
| if statusCode >= http.StatusBadRequest && statusCode <= http.StatusUnavailableForLegalReasons { |
| DefaultPrometheusExporter.Count(LError4XX, e.LabelNames, LabelValues) |
| DefaultPrometheusExporter.Count(LTotalFailures, e.LabelNames, LabelValues) |
| } else if statusCode >= http.StatusInternalServerError && statusCode <= http.StatusNetworkAuthenticationRequired { |
| DefaultPrometheusExporter.Count(LError5XX, e.LabelNames, LabelValues) |
| DefaultPrometheusExporter.Count(LTotalFailures, e.LabelNames, LabelValues) |
| } else if statusCode >= http.StatusOK && statusCode <= http.StatusIMUsed { |
| DefaultPrometheusExporter.Count(LTotalSuccess, e.LabelNames, LabelValues) |
| } |
| DefaultPrometheusExporter.Count(LTotalRequest, e.LabelNames, LabelValues) |
| } |
| |
| //RecordLatency record operation latency |
| func (e *PromRecorder) RecordLatency(LabelValues map[string]string, latency float64) { |
| DefaultPrometheusExporter.Summary(LRequestLatencySeconds, latency, e.LabelNames, LabelValues) |
| |
| } |
| |
| //RecordStartTime save start time |
| func (e *PromRecorder) RecordStartTime(LabelValues map[string]string, start time.Time) { |
| DefaultPrometheusExporter.Gauge(LStartTime, float64(start.Unix()), e.LabelNames, LabelValues) |
| |
| } |