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f0e1b592ab
The sort implementation using Go generics is used everywhere else in Prometheus. Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
66 lines
2.2 KiB
Go
66 lines
2.2 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 exemplar
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import "github.com/prometheus/prometheus/model/labels"
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// The combined length of the label names and values of an Exemplar's LabelSet MUST NOT exceed 128 UTF-8 characters
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// https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#exemplars
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const ExemplarMaxLabelSetLength = 128
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// Exemplar is additional information associated with a time series.
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type Exemplar struct {
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Labels labels.Labels `json:"labels"`
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Value float64 `json:"value"`
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Ts int64 `json:"timestamp"`
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HasTs bool
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}
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type QueryResult struct {
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SeriesLabels labels.Labels `json:"seriesLabels"`
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Exemplars []Exemplar `json:"exemplars"`
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}
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// Equals compares if the exemplar e is the same as e2. Note that if HasTs is false for
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// both exemplars then the timestamps will be ignored for the comparison. This can come up
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// when an exemplar is exported without it's own timestamp, in which case the scrape timestamp
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// is assigned to the Ts field. However we still want to treat the same exemplar, scraped without
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// an exported timestamp, as a duplicate of itself for each subsequent scrape.
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func (e Exemplar) Equals(e2 Exemplar) bool {
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if !labels.Equal(e.Labels, e2.Labels) {
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return false
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}
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if (e.HasTs || e2.HasTs) && e.Ts != e2.Ts {
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return false
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}
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return e.Value == e2.Value
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}
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// Sort first by timestamp, then value, then labels.
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func Compare(a, b Exemplar) int {
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if a.Ts < b.Ts {
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return -1
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} else if a.Ts > b.Ts {
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return 1
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}
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if a.Value < b.Value {
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return -1
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} else if a.Value > b.Value {
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return 1
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}
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return labels.Compare(a.Labels, b.Labels)
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}
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