forked from mirrors/statsd_exporter
74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
// Copyright 2019 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package mapper
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import (
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"github.com/prometheus/client_golang/prometheus"
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)
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type CacheMetrics struct {
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CacheLength prometheus.Gauge
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CacheGetsTotal prometheus.Counter
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CacheHitsTotal prometheus.Counter
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}
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func NewCacheMetrics(reg prometheus.Registerer) *CacheMetrics {
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var m CacheMetrics
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m.CacheLength = prometheus.NewGauge(
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prometheus.GaugeOpts{
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Name: "statsd_metric_mapper_cache_length",
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Help: "The count of unique metrics currently cached.",
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},
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)
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m.CacheGetsTotal = prometheus.NewCounter(
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prometheus.CounterOpts{
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Name: "statsd_metric_mapper_cache_gets_total",
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Help: "The count of total metric cache gets.",
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},
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)
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m.CacheHitsTotal = prometheus.NewCounter(
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prometheus.CounterOpts{
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Name: "statsd_metric_mapper_cache_hits_total",
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Help: "The count of total metric cache hits.",
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},
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)
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if reg != nil {
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reg.MustRegister(m.CacheLength)
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reg.MustRegister(m.CacheGetsTotal)
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reg.MustRegister(m.CacheHitsTotal)
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}
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return &m
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}
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type MetricMapperCacheResult struct {
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Mapping *MetricMapping
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Matched bool
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Labels prometheus.Labels
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}
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// MetricMapperCache MUST be thread-safe and should be instrumented with CacheMetrics
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type MetricMapperCache interface {
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// Get a cached result
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Get(metricKey string) (interface{}, bool)
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// Add a statsd MetricMapperResult to the cache
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Add(metricKey string, result interface{}) // Add an item to the cache
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// Reset clears the cache for config reloads
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Reset()
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}
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func formatKey(metricString string, metricType MetricType) string {
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return string(metricType) + "." + metricString
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}
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