prometheus/storage/metric/interface.go
Matt T. Proud 3ac5d48b1a Impl' storage i'faces and fix non-idiomatic warts.
This change includes implementation of most major storage layer
features, albeit some imperfect.  It also includes nascent telemetry
bindings, too.
2013-01-04 10:39:38 +01:00

55 lines
1.9 KiB
Go

// Copyright 2012 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 metric
import (
"github.com/matttproud/prometheus/model"
"time"
)
type StalenessPolicy struct {
DeltaAllowance time.Duration
}
// MetricPersistence is a system for storing metric samples in a persistence
// layer.
type MetricPersistence interface {
// A storage system may rely on external resources and thusly should be
// closed when finished.
Close() error
// Record a new sample in the storage layer.
AppendSample(sample *model.Sample) error
// Get all of the metric fingerprints that are associated with the provided
// label set.
GetFingerprintsForLabelSet(labelSet *model.LabelSet) ([]*model.Fingerprint, error)
// Get all of the metric fingerprints that are associated for a given label
// name.
GetFingerprintsForLabelName(labelName *model.LabelName) ([]*model.Fingerprint, error)
GetMetricForFingerprint(f *model.Fingerprint) (*model.Metric, error)
GetValueAtTime(*model.Metric, *time.Time, *StalenessPolicy) (*model.Sample, error)
GetBoundaryValues(*model.Metric, *model.Interval, *StalenessPolicy) (*model.Sample, *model.Sample, error)
GetRangeValues(*model.Metric, *model.Interval, *StalenessPolicy) (*model.SampleSet, error)
// DIAGNOSTIC FUNCTIONS PENDING DELETION BELOW HERE
GetAllLabelNames() ([]string, error)
GetAllLabelPairs() ([]model.LabelSet, error)
GetAllMetrics() ([]model.LabelSet, error)
}