mirror of https://github.com/prometheus/prometheus
102 lines
2.2 KiB
Go
102 lines
2.2 KiB
Go
// Copyright 2023 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 chunks
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import (
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"github.com/prometheus/prometheus/model/histogram"
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"github.com/prometheus/prometheus/tsdb/chunkenc"
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)
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type Samples interface {
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Get(i int) Sample
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Len() int
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}
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type Sample interface {
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T() int64
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F() float64
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H() *histogram.Histogram
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FH() *histogram.FloatHistogram
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Type() chunkenc.ValueType
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Copy() Sample // Returns a deep copy.
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}
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type SampleSlice []Sample
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func (s SampleSlice) Get(i int) Sample { return s[i] }
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func (s SampleSlice) Len() int { return len(s) }
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type sample struct {
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t int64
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f float64
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h *histogram.Histogram
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fh *histogram.FloatHistogram
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}
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func (s sample) T() int64 {
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return s.t
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}
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func (s sample) F() float64 {
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return s.f
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}
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func (s sample) H() *histogram.Histogram {
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return s.h
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}
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func (s sample) FH() *histogram.FloatHistogram {
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return s.fh
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}
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func (s sample) Type() chunkenc.ValueType {
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switch {
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case s.h != nil:
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return chunkenc.ValHistogram
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case s.fh != nil:
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return chunkenc.ValFloatHistogram
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default:
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return chunkenc.ValFloat
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}
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}
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func (s sample) Copy() Sample {
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c := sample{t: s.t, f: s.f}
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if s.h != nil {
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c.h = s.h.Copy()
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}
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if s.fh != nil {
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c.fh = s.fh.Copy()
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}
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return c
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}
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// GenerateSamples starting at start and counting up numSamples.
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func GenerateSamples(start, numSamples int) []Sample {
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return generateSamples(start, numSamples, func(i int) Sample {
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return sample{
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t: int64(i),
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f: float64(i),
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}
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})
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}
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func generateSamples(start, numSamples int, gen func(int) Sample) []Sample {
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samples := make([]Sample, 0, numSamples)
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for i := start; i < start+numSamples; i++ {
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samples = append(samples, gen(i))
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}
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return samples
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}
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