mirror of
https://github.com/prometheus/prometheus.git
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54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
// Copyright 2018 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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"github.com/prometheus/prometheus/tsdb/chunkenc"
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"github.com/prometheus/prometheus/tsdb/chunks"
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)
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type Sample interface {
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T() int64
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V() float64
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}
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func ChunkFromSamples(s []Sample) chunks.Meta {
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mint, maxt := int64(0), int64(0)
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if len(s) > 0 {
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mint, maxt = s[0].T(), s[len(s)-1].T()
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}
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c := chunkenc.NewXORChunk()
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ca, _ := c.Appender()
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for _, s := range s {
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ca.Append(s.T(), s.V())
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}
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return chunks.Meta{
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MinTime: mint,
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MaxTime: maxt,
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Chunk: c,
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}
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}
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// PopulatedChunk creates a chunk populated with samples every second starting at minTime
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func PopulatedChunk(numSamples int, minTime int64) chunks.Meta {
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samples := make([]Sample, numSamples)
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for i := 0; i < numSamples; i++ {
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samples[i] = sample{minTime + int64(i*1000), 1.0}
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}
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return ChunkFromSamples(samples)
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}
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