mirror of
https://github.com/prometheus/prometheus.git
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63625bd244
This makes the memory persistence the backing store for views and adjusts the MetricPersistence interface accordingly. It also removes unused Get* method implementations from the LevelDB persistence so they don't need to be adapted to the new interface. In the future, we should rethink these interfaces. All staleness and interpolation handling is now removed from the storage layer and will be handled only by the query layer in the future.
114 lines
3.6 KiB
Go
114 lines
3.6 KiB
Go
// Copyright 2013 Prometheus Team
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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 metric
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import (
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"github.com/prometheus/prometheus/model"
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"sort"
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"time"
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)
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var (
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// firstSupertime is the smallest valid supertime that may be seeked to.
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firstSupertime = []byte{0, 0, 0, 0, 0, 0, 0, 0}
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// lastSupertime is the largest valid supertime that may be seeked to.
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lastSupertime = []byte{127, 255, 255, 255, 255, 255, 255, 255}
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)
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// Represents the summation of all datastore queries that shall be performed to
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// extract values. Each operation mutates the state of the builder.
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type ViewRequestBuilder interface {
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GetMetricAtTime(fingerprint model.Fingerprint, time time.Time)
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GetMetricAtInterval(fingerprint model.Fingerprint, from, through time.Time, interval time.Duration)
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GetMetricRange(fingerprint model.Fingerprint, from, through time.Time)
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ScanJobs() scanJobs
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}
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// Contains the various unoptimized requests for data.
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type viewRequestBuilder struct {
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operations map[model.Fingerprint]ops
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}
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// Furnishes a ViewRequestBuilder for remarking what types of queries to perform.
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func NewViewRequestBuilder() viewRequestBuilder {
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return viewRequestBuilder{
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operations: make(map[model.Fingerprint]ops),
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}
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}
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// Gets for the given Fingerprint either the value at that time if there is an
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// match or the one or two values adjacent thereto.
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func (v viewRequestBuilder) GetMetricAtTime(fingerprint model.Fingerprint, time time.Time) {
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ops := v.operations[fingerprint]
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ops = append(ops, &getValuesAtTimeOp{
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time: time,
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})
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v.operations[fingerprint] = ops
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}
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// Gets for the given Fingerprint either the value at that interval from From
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// through Through if there is an match or the one or two values adjacent
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// for each point.
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func (v viewRequestBuilder) GetMetricAtInterval(fingerprint model.Fingerprint, from, through time.Time, interval time.Duration) {
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ops := v.operations[fingerprint]
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ops = append(ops, &getValuesAtIntervalOp{
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from: from,
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through: through,
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interval: interval,
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})
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v.operations[fingerprint] = ops
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}
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// Gets for the given Fingerprint either the values that occur inclusively from
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// From through Through.
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func (v viewRequestBuilder) GetMetricRange(fingerprint model.Fingerprint, from, through time.Time) {
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ops := v.operations[fingerprint]
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ops = append(ops, &getValuesAlongRangeOp{
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from: from,
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through: through,
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})
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v.operations[fingerprint] = ops
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}
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// Emits the optimized scans that will occur in the data store. This
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// effectively resets the ViewRequestBuilder back to a pristine state.
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func (v viewRequestBuilder) ScanJobs() (j scanJobs) {
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for fingerprint, operations := range v.operations {
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sort.Sort(startsAtSort{operations})
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j = append(j, scanJob{
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fingerprint: fingerprint,
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operations: optimize(operations),
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})
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delete(v.operations, fingerprint)
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}
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sort.Sort(j)
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return
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}
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type view struct {
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memorySeriesStorage
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}
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func (v view) appendSample(fingerprint model.Fingerprint, timestamp time.Time, value model.SampleValue) {
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v.appendSampleWithoutIndexing(fingerprint, timestamp, value)
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}
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func newView() view {
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return view{NewMemorySeriesStorage()}
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}
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