prometheus/storage/local/preload.go
Julius Volz e7ed39c9a6 Initial experimental snapshot of next-gen storage.
Change-Id: Ifb8709960dbedd1d9f5efd88cdd359ee9fa9d26d
2014-11-25 17:02:00 +01:00

103 lines
3.2 KiB
Go

// Copyright 2013 Prometheus Team
// 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 storage_ng
import (
clientmodel "github.com/prometheus/client_golang/model"
)
// memorySeriesPreloader is a Preloader for the memorySeriesStorage.
type memorySeriesPreloader struct {
storage *memorySeriesStorage
pinnedChunkDescs chunkDescs
}
func (p *memorySeriesPreloader) PreloadRange(fp clientmodel.Fingerprint, from clientmodel.Timestamp, through clientmodel.Timestamp) error {
cds, err := p.storage.preloadChunksForRange(fp, from, through)
if err != nil {
return err
}
p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
return nil
}
/*
// GetMetricAtTime implements Preloader.
func (p *memorySeriesPreloader) GetMetricAtTime(fp clientmodel.Fingerprint, t clientmodel.Timestamp) error {
cds, err := p.storage.preloadChunks(fp, &timeSelector{
from: t,
through: t,
})
if err != nil {
return err
}
p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
return nil
}
// GetMetricAtInterval implements Preloader.
func (p *memorySeriesPreloader) GetMetricAtInterval(fp clientmodel.Fingerprint, from, through clientmodel.Timestamp, interval time.Duration) error {
cds, err := p.storage.preloadChunks(fp, &timeSelector{
from: from,
through: through,
interval: interval,
})
if err != nil {
return err
}
p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
return
}
// GetMetricRange implements Preloader.
func (p *memorySeriesPreloader) GetMetricRange(fp clientmodel.Fingerprint, t clientmodel.Timestamp, rangeDuration time.Duration) error {
cds, err := p.storage.preloadChunks(fp, &timeSelector{
from: t,
through: t,
rangeDuration: through.Sub(from),
})
if err != nil {
return err
}
p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
return
}
// GetMetricRangeAtInterval implements Preloader.
func (p *memorySeriesPreloader) GetMetricRangeAtInterval(fp clientmodel.Fingerprint, from, through clientmodel.Timestamp, interval, rangeDuration time.Duration) error {
cds, err := p.storage.preloadChunks(fp, &timeSelector{
from: from,
through: through,
interval: interval,
rangeDuration: rangeDuration,
})
if err != nil {
return err
}
p.pinnedChunkDescs = append(p.pinnedChunkDescs, cds...)
return
}
*/
// Close implements Preloader.
func (p *memorySeriesPreloader) Close() {
for _, cd := range p.pinnedChunkDescs {
// TODO: unpinning may synchronously cause closing of chunks if they have
// been marked to be evicted. This could interfere with other parts of the
// storage that check whether a chunk is swapped in or not. Is it a good
// idea / sufficient to take the storage lock here?
cd.unpin()
}
}