5d54584f03
Also bringing: . golang.org/x/net 5561cd9b4330353950f399814f427425c0a26fd2 . github.com/docker/distribution 83389a148052d74ac602f5f1d62f86ff2f3c4aa5 . github.com/docker/swarmkit bd69f6e8e301645afd344913fa1ede53a0a111fb . github.com/docker/go-metrics d466d4f6fd960e01820085bd7e1a24426ee7ef18 . github.com/prometheus/client_golang 52437c81da6b127a9925d17eb3a382a2e5fd395e . github.com/beorn7/perks 4c0e84591b9aa9e6dcfdf3e020114cd81f89d5f9 . github.com/prometheus/client_model fa8ad6fec33561be4280a8f0514318c79d7f6cb6 . github.com/prometheus/common ebdfc6da46522d58825777cf1f90490a5b1ef1d8 . github.com/prometheus/procfs abf152e5f3e97f2fafac028d2cc06c1feb87ffa5 . github.com/matttproud/golang_protobuf_extensions v1.0.0 Signed-off-by: Mathieu Champlon <mathieu.champlon@docker.com>
99 lines
2.5 KiB
Go
99 lines
2.5 KiB
Go
// Copyright 2013 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 model
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import (
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"fmt"
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"regexp"
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"sort"
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"strings"
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)
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var (
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separator = []byte{0}
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MetricNameRE = regexp.MustCompile(`^[a-zA-Z_][a-zA-Z0-9_:]*$`)
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)
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// A Metric is similar to a LabelSet, but the key difference is that a Metric is
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// a singleton and refers to one and only one stream of samples.
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type Metric LabelSet
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// Equal compares the metrics.
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func (m Metric) Equal(o Metric) bool {
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return LabelSet(m).Equal(LabelSet(o))
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}
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// Before compares the metrics' underlying label sets.
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func (m Metric) Before(o Metric) bool {
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return LabelSet(m).Before(LabelSet(o))
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}
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// Clone returns a copy of the Metric.
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func (m Metric) Clone() Metric {
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clone := Metric{}
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for k, v := range m {
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clone[k] = v
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}
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return clone
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}
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func (m Metric) String() string {
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metricName, hasName := m[MetricNameLabel]
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numLabels := len(m) - 1
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if !hasName {
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numLabels = len(m)
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}
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labelStrings := make([]string, 0, numLabels)
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for label, value := range m {
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if label != MetricNameLabel {
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labelStrings = append(labelStrings, fmt.Sprintf("%s=%q", label, value))
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}
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}
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switch numLabels {
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case 0:
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if hasName {
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return string(metricName)
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}
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return "{}"
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default:
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sort.Strings(labelStrings)
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return fmt.Sprintf("%s{%s}", metricName, strings.Join(labelStrings, ", "))
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}
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}
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// Fingerprint returns a Metric's Fingerprint.
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func (m Metric) Fingerprint() Fingerprint {
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return LabelSet(m).Fingerprint()
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}
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// FastFingerprint returns a Metric's Fingerprint calculated by a faster hashing
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// algorithm, which is, however, more susceptible to hash collisions.
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func (m Metric) FastFingerprint() Fingerprint {
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return LabelSet(m).FastFingerprint()
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}
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// IsValidMetricName returns true iff name matches the pattern of MetricNameRE.
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func IsValidMetricName(n LabelValue) bool {
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if len(n) == 0 {
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return false
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}
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for i, b := range n {
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if !((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || b == ':' || (b >= '0' && b <= '9' && i > 0)) {
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return false
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}
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}
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return true
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}
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