prometheus/tsdbutil/chunks.go
Ganesh Vernekar a95323c021 Add license headers to missing files (#447)
Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>
2018-11-06 20:19:42 +02:00

54 lines
1.4 KiB
Go

// Copyright 2018 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tsdbutil
import (
"github.com/prometheus/tsdb/chunkenc"
"github.com/prometheus/tsdb/chunks"
)
type Sample interface {
T() int64
V() float64
}
func ChunkFromSamples(s []Sample) chunks.Meta {
mint, maxt := int64(0), int64(0)
if len(s) > 0 {
mint, maxt = s[0].T(), s[len(s)-1].T()
}
c := chunkenc.NewXORChunk()
ca, _ := c.Appender()
for _, s := range s {
ca.Append(s.T(), s.V())
}
return chunks.Meta{
MinTime: mint,
MaxTime: maxt,
Chunk: c,
}
}
// PopulatedChunk creates a chunk populated with samples every second starting at minTime
func PopulatedChunk(numSamples int, minTime int64) chunks.Meta {
samples := make([]Sample, numSamples)
for i := 0; i < numSamples; i++ {
samples[i] = sample{minTime + int64(i*1000), 1.0}
}
return ChunkFromSamples(samples)
}