| // 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 rest |
| |
| import ( |
| "github.com/apache/servicecomb-service-center/server/metric" |
| dto "github.com/prometheus/client_model/go" |
| ) |
| |
| const ( |
| httpRequestTotal = "http_request_total" |
| ) |
| |
| var qpsLabelMap = map[string]int{ |
| "method": 0, |
| "instance": 1, |
| "api": 2, |
| "domain": 3, |
| } |
| |
| type APIReporter struct { |
| cache *metric.Details |
| } |
| |
| func (r *APIReporter) Report() { |
| details := metric.Gatherer.Records.Get(httpRequestTotal) |
| if details == nil { |
| return |
| } |
| |
| defer func() { r.cache = details }() |
| |
| if r.cache == nil { |
| return |
| } |
| details.ForEach(func(labels []*dto.LabelPair, v float64) (next bool) { |
| old := r.cache.Get(labels) |
| queryPerSeconds.WithLabelValues(r.toLabels(labels)...).Set((v - old) / metric.Period.Seconds()) |
| return true |
| }) |
| } |
| |
| func (r *APIReporter) toLabels(pairs []*dto.LabelPair) (labels []string) { |
| labels = make([]string, len(qpsLabelMap)) |
| for _, pair := range pairs { |
| if i, ok := qpsLabelMap[pair.GetName()]; ok { |
| labels[i] = pair.GetValue() |
| } |
| } |
| return |
| } |
| |
| func init() { |
| metric.RegisterReporter("rest", NewAPIReporter()) |
| } |
| |
| func NewAPIReporter() *APIReporter { |
| return &APIReporter{} |
| } |