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88 lines
3 KiB
Go
88 lines
3 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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"github.com/prometheus/prometheus/storage"
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"time"
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)
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// MetricPersistence is a system for storing metric samples in a persistence
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// layer.
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type MetricPersistence interface {
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// A storage system may rely on external resources and thusly should be
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// closed when finished.
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Close() error
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// Commit all pending operations, if any, since some of the storage components
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// queue work on channels and operate on it in bulk.
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// Flush() error
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// Record a new sample in the storage layer.
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AppendSample(model.Sample) error
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// Record a new sample in the storage layer.
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AppendSamples(model.Samples) error
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// Get all of the metric fingerprints that are associated with the provided
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// label set.
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GetFingerprintsForLabelSet(model.LabelSet) (model.Fingerprints, error)
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// Get all of the metric fingerprints that are associated for a given label
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// name.
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GetFingerprintsForLabelName(model.LabelName) (model.Fingerprints, error)
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GetMetricForFingerprint(model.Fingerprint) (*model.Metric, error)
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GetValueAtTime(model.Fingerprint, time.Time, StalenessPolicy) (*model.Sample, error)
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GetBoundaryValues(model.Fingerprint, model.Interval, StalenessPolicy) (*model.Sample, *model.Sample, error)
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GetRangeValues(model.Fingerprint, model.Interval) (*model.SampleSet, error)
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ForEachSample(IteratorsForFingerprintBuilder) (err error)
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GetAllMetricNames() ([]string, error)
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// Requests the storage stack to build a materialized View of the values
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// contained therein.
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// MakeView(builder ViewRequestBuilder, deadline time.Duration) (View, error)
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}
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// Describes the lenience limits for querying the materialized View.
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type StalenessPolicy struct {
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// Describes the inclusive limit at which individual points if requested will
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// be matched and subject to interpolation.
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DeltaAllowance time.Duration
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}
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// View provides view of the values in the datastore subject to the request of a
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// preloading operation.
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type View interface {
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GetValueAtTime(model.Fingerprint, time.Time) []model.SamplePair
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GetBoundaryValues(model.Fingerprint, model.Interval) (first []model.SamplePair, second []model.SamplePair)
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GetRangeValues(model.Fingerprint, model.Interval) []model.SamplePair
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// Destroy this view.
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Close()
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}
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type Series interface {
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Fingerprint() model.Fingerprint
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Metric() model.Metric
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}
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type IteratorsForFingerprintBuilder interface {
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ForStream(stream stream) (storage.RecordDecoder, storage.RecordFilter, storage.RecordOperator)
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}
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