mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-25 13:44:05 -08:00
65 lines
2 KiB
Go
65 lines
2 KiB
Go
// Copyright 2017 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 remote
|
|
|
|
import (
|
|
"sort"
|
|
|
|
"github.com/prometheus/common/model"
|
|
"github.com/prometheus/prometheus/storage/metric"
|
|
)
|
|
|
|
// This is a struct and not just a renamed type because otherwise the Metric
|
|
// field and Metric() methods would clash.
|
|
type sampleStreamIterator struct {
|
|
ss *model.SampleStream
|
|
}
|
|
|
|
func (it sampleStreamIterator) Metric() metric.Metric {
|
|
return metric.Metric{Metric: it.ss.Metric}
|
|
}
|
|
|
|
func (it sampleStreamIterator) ValueAtOrBeforeTime(ts model.Time) model.SamplePair {
|
|
// TODO: This is a naive inefficient approach - in reality, queries go mostly
|
|
// linearly through iterators, and we will want to make successive calls to
|
|
// this method more efficient by taking into account the last result index
|
|
// somehow (similarly to how it's done in Prometheus's
|
|
// memorySeriesIterators).
|
|
i := sort.Search(len(it.ss.Values), func(n int) bool {
|
|
return it.ss.Values[n].Timestamp.After(ts)
|
|
})
|
|
if i == 0 {
|
|
return model.SamplePair{Timestamp: model.Earliest}
|
|
}
|
|
return it.ss.Values[i-1]
|
|
}
|
|
|
|
func (it sampleStreamIterator) RangeValues(in metric.Interval) []model.SamplePair {
|
|
n := len(it.ss.Values)
|
|
start := sort.Search(n, func(i int) bool {
|
|
return !it.ss.Values[i].Timestamp.Before(in.OldestInclusive)
|
|
})
|
|
end := sort.Search(n, func(i int) bool {
|
|
return it.ss.Values[i].Timestamp.After(in.NewestInclusive)
|
|
})
|
|
|
|
if start == n {
|
|
return nil
|
|
}
|
|
|
|
return it.ss.Values[start:end]
|
|
}
|
|
|
|
func (it sampleStreamIterator) Close() {}
|