mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-28 15:09:39 -08:00
8f4c7ece92
The use of naked return values is frowned upon. This is the first of two bulk updates to remove them.
85 lines
2.6 KiB
Go
85 lines
2.6 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 model
|
|
|
|
import (
|
|
"code.google.com/p/goprotobuf/proto"
|
|
"fmt"
|
|
"github.com/prometheus/prometheus/coding/indexable"
|
|
dto "github.com/prometheus/prometheus/model/generated"
|
|
"time"
|
|
)
|
|
|
|
// SampleKey models the business logic around the data-transfer object
|
|
// SampleKey.
|
|
type SampleKey struct {
|
|
Fingerprint Fingerprint
|
|
FirstTimestamp time.Time
|
|
LastTimestamp time.Time
|
|
SampleCount uint32
|
|
}
|
|
|
|
// MayContain indicates whether the given SampleKey could potentially contain a
|
|
// value at the provided time. Even if true is emitted, that does not mean a
|
|
// satisfactory value, in fact, exists.
|
|
func (s SampleKey) MayContain(t time.Time) bool {
|
|
switch {
|
|
case t.Before(s.FirstTimestamp):
|
|
return false
|
|
case t.After(s.LastTimestamp):
|
|
return false
|
|
default:
|
|
return true
|
|
}
|
|
}
|
|
|
|
// ToDTO converts this SampleKey into a DTO for use in serialization purposes.
|
|
func (s SampleKey) ToDTO() (out *dto.SampleKey) {
|
|
out = &dto.SampleKey{
|
|
Fingerprint: s.Fingerprint.ToDTO(),
|
|
Timestamp: indexable.EncodeTime(s.FirstTimestamp),
|
|
LastTimestamp: proto.Int64(s.LastTimestamp.Unix()),
|
|
SampleCount: proto.Uint32(s.SampleCount),
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// ToPartialDTO converts this SampleKey into a DTO that is only suitable for
|
|
// database exploration purposes for a given (Fingerprint, First Sample Time)
|
|
// tuple.
|
|
func (s SampleKey) ToPartialDTO(out *dto.SampleKey) {
|
|
out = &dto.SampleKey{
|
|
Fingerprint: s.Fingerprint.ToDTO(),
|
|
Timestamp: indexable.EncodeTime(s.FirstTimestamp),
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (s SampleKey) String() string {
|
|
return fmt.Sprintf("SampleKey for %s at %s to %s with %d values.", s.Fingerprint, s.FirstTimestamp, s.LastTimestamp, s.SampleCount)
|
|
}
|
|
|
|
// NewSampleKeyFromDTO builds a new SampleKey from a provided data-transfer
|
|
// object.
|
|
func NewSampleKeyFromDTO(dto *dto.SampleKey) SampleKey {
|
|
return SampleKey{
|
|
Fingerprint: NewFingerprintFromDTO(dto.Fingerprint),
|
|
FirstTimestamp: indexable.DecodeTime(dto.Timestamp),
|
|
LastTimestamp: time.Unix(*dto.LastTimestamp, 0).UTC(),
|
|
SampleCount: *dto.SampleCount,
|
|
}
|
|
}
|