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5bee0cfce2
The ChunkReader interface's Chunk() has been changed to ChunkOrIterable(). This is a precursor to OOO native histogram support - with OOO native histograms, the chunks.Meta passed to Chunk() can result in multiple chunks being returned rather than just a single chunk (e.g. if oooMergedChunk has a counter reset in the middle). To support this, ChunkOrIterable() requires either a single chunk or an iterable to be returned. If an iterable is returned, the caller has the responsibility of converting the samples from the iterable into possibly multiple chunks. The OOOHeadChunkReader now returns an iterable rather than a chunk to prepare for the native histograms case. Also as a beneficial side effect, oooMergedChunk and boundedChunk has been simplified as they only need to implement the Iterable interface now, not the full Chunk interface. --------- Signed-off-by: Fiona Liao <fiona.y.liao@gmail.com> Co-authored-by: George Krajcsovits <krajorama@users.noreply.github.com>
133 lines
3.7 KiB
Go
133 lines
3.7 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 tsdbutil
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import (
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"math"
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"github.com/prometheus/prometheus/model/histogram"
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)
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func GenerateTestHistograms(n int) (r []*histogram.Histogram) {
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for i := 0; i < n; i++ {
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h := GenerateTestHistogram(i)
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if i > 0 {
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h.CounterResetHint = histogram.NotCounterReset
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}
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r = append(r, h)
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}
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return r
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}
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// GenerateTestHistogram but it is up to the user to set any known counter reset hint.
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func GenerateTestHistogram(i int) *histogram.Histogram {
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return &histogram.Histogram{
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Count: 12 + uint64(i*9),
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ZeroCount: 2 + uint64(i),
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ZeroThreshold: 0.001,
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Sum: 18.4 * float64(i+1),
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Schema: 1,
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PositiveSpans: []histogram.Span{
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{Offset: 0, Length: 2},
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{Offset: 1, Length: 2},
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},
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PositiveBuckets: []int64{int64(i + 1), 1, -1, 0},
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NegativeSpans: []histogram.Span{
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{Offset: 0, Length: 2},
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{Offset: 1, Length: 2},
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},
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NegativeBuckets: []int64{int64(i + 1), 1, -1, 0},
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}
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}
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func GenerateTestGaugeHistograms(n int) (r []*histogram.Histogram) {
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for x := 0; x < n; x++ {
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i := int(math.Sin(float64(x))*100) + 100
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r = append(r, GenerateTestGaugeHistogram(i))
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}
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return r
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}
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func GenerateTestGaugeHistogram(i int) *histogram.Histogram {
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h := GenerateTestHistogram(i)
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h.CounterResetHint = histogram.GaugeType
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return h
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}
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func GenerateTestFloatHistograms(n int) (r []*histogram.FloatHistogram) {
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for i := 0; i < n; i++ {
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h := GenerateTestFloatHistogram(i)
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if i > 0 {
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h.CounterResetHint = histogram.NotCounterReset
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}
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r = append(r, h)
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}
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return r
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}
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// GenerateTestFloatHistogram but it is up to the user to set any known counter reset hint.
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func GenerateTestFloatHistogram(i int) *histogram.FloatHistogram {
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return &histogram.FloatHistogram{
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Count: 12 + float64(i*9),
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ZeroCount: 2 + float64(i),
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ZeroThreshold: 0.001,
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Sum: 18.4 * float64(i+1),
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Schema: 1,
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PositiveSpans: []histogram.Span{
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{Offset: 0, Length: 2},
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{Offset: 1, Length: 2},
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},
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PositiveBuckets: []float64{float64(i + 1), float64(i + 2), float64(i + 1), float64(i + 1)},
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NegativeSpans: []histogram.Span{
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{Offset: 0, Length: 2},
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{Offset: 1, Length: 2},
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},
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NegativeBuckets: []float64{float64(i + 1), float64(i + 2), float64(i + 1), float64(i + 1)},
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}
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}
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func GenerateTestGaugeFloatHistograms(n int) (r []*histogram.FloatHistogram) {
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for x := 0; x < n; x++ {
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i := int(math.Sin(float64(x))*100) + 100
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r = append(r, GenerateTestGaugeFloatHistogram(i))
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}
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return r
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}
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func GenerateTestGaugeFloatHistogram(i int) *histogram.FloatHistogram {
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h := GenerateTestFloatHistogram(i)
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h.CounterResetHint = histogram.GaugeType
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return h
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}
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func SetHistogramNotCounterReset(h *histogram.Histogram) *histogram.Histogram {
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h.CounterResetHint = histogram.NotCounterReset
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return h
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}
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func SetHistogramCounterReset(h *histogram.Histogram) *histogram.Histogram {
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h.CounterResetHint = histogram.CounterReset
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return h
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}
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func SetFloatHistogramNotCounterReset(h *histogram.FloatHistogram) *histogram.FloatHistogram {
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h.CounterResetHint = histogram.NotCounterReset
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return h
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}
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func SetFloatHistogramCounterReset(h *histogram.FloatHistogram) *histogram.FloatHistogram {
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h.CounterResetHint = histogram.CounterReset
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return h
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}
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