statsd_exporter/pkg/metrics/metrics.go

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// Copyright 2013 The Prometheus Authors
// Licensed 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 (
"time"
"github.com/prometheus/client_golang/prometheus"
)
type MetricType int
const (
CounterMetricType MetricType = iota
GaugeMetricType
SummaryMetricType
HistogramMetricType
)
type NameHash uint64
type ValueHash uint64
type LabelHash struct {
// This is a hash over the label names
Names NameHash
// This is a hash over the label names + label values
Values ValueHash
}
type MetricHolder interface{}
type VectorHolder interface {
Delete(label prometheus.Labels) bool
}
type Vector struct {
Holder VectorHolder
RefCount uint64
}
type Metric struct {
MetricType MetricType
// Vectors key is the hash of the label names
Vectors map[NameHash]*Vector
// Metrics key is a hash of the label names + label values
Metrics map[ValueHash]*RegisteredMetric
}
type RegisteredMetric struct {
LastRegisteredAt time.Time
Labels prometheus.Labels
TTL time.Duration
Metric MetricHolder
VecKey NameHash
}