mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-26 22:19:40 -08:00
4a87c002e8
This commit fixes a critique of the old storage API design, whereby the input parameters were always as raw bytes and never Protocol Buffer messages that encapsulated the data, meaning every place a read or mutation was conducted needed to manually perform said translations on its own. This is taxing. Change-Id: I4786938d0d207cefb7782bd2bd96a517eead186f
124 lines
3.2 KiB
Go
124 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 metric
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
"code.google.com/p/goprotobuf/proto"
|
|
|
|
clientmodel "github.com/prometheus/client_golang/model"
|
|
|
|
"github.com/prometheus/prometheus/coding/indexable"
|
|
|
|
dto "github.com/prometheus/prometheus/model/generated"
|
|
)
|
|
|
|
// SampleKey models the business logic around the data-transfer object
|
|
// SampleKey.
|
|
type SampleKey struct {
|
|
Fingerprint *clientmodel.Fingerprint
|
|
FirstTimestamp time.Time
|
|
LastTimestamp time.Time
|
|
SampleCount uint32
|
|
}
|
|
|
|
// Constrain merges the underlying SampleKey to fit within the keyspace of
|
|
// the provided first and last keys and returns whether the key was modified.
|
|
func (s *SampleKey) Constrain(first, last *SampleKey) bool {
|
|
switch {
|
|
case s.Before(first.Fingerprint, first.FirstTimestamp):
|
|
*s = *first
|
|
return true
|
|
case last.Before(s.Fingerprint, s.FirstTimestamp):
|
|
*s = *last
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func (s *SampleKey) Equal(o *SampleKey) bool {
|
|
if s == o {
|
|
return true
|
|
}
|
|
|
|
if !s.Fingerprint.Equal(o.Fingerprint) {
|
|
return false
|
|
}
|
|
if !s.FirstTimestamp.Equal(o.FirstTimestamp) {
|
|
return false
|
|
}
|
|
if !s.LastTimestamp.Equal(o.LastTimestamp) {
|
|
return false
|
|
}
|
|
|
|
return s.SampleCount == o.SampleCount
|
|
}
|
|
|
|
// 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
|
|
}
|
|
}
|
|
|
|
func (s *SampleKey) Before(fp *clientmodel.Fingerprint, t time.Time) bool {
|
|
if s.Fingerprint.Less(fp) {
|
|
return true
|
|
}
|
|
if !s.Fingerprint.Equal(fp) {
|
|
return false
|
|
}
|
|
|
|
if s.FirstTimestamp.Before(t) {
|
|
return true
|
|
}
|
|
|
|
return s.LastTimestamp.Before(t)
|
|
}
|
|
|
|
// ToDTO converts this SampleKey into a DTO for use in serialization purposes.
|
|
func (s *SampleKey) Dump(d *dto.SampleKey) {
|
|
d.Reset()
|
|
fp := &dto.Fingerprint{}
|
|
dumpFingerprint(fp, s.Fingerprint)
|
|
|
|
d.Fingerprint = fp
|
|
d.Timestamp = indexable.EncodeTime(s.FirstTimestamp)
|
|
d.LastTimestamp = proto.Int64(s.LastTimestamp.Unix())
|
|
d.SampleCount = proto.Uint32(s.SampleCount)
|
|
}
|
|
|
|
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)
|
|
}
|
|
|
|
func (s *SampleKey) Load(d *dto.SampleKey) {
|
|
f := &clientmodel.Fingerprint{}
|
|
loadFingerprint(f, d.GetFingerprint())
|
|
s.Fingerprint = f
|
|
s.FirstTimestamp = indexable.DecodeTime(d.Timestamp)
|
|
s.LastTimestamp = time.Unix(d.GetLastTimestamp(), 0).UTC()
|
|
s.SampleCount = d.GetSampleCount()
|
|
}
|