prometheus/storage/errors.go
Oleg Zaytsev 0833d2a230
Fix appendable: check whether last val was a histogram (#14613)
* Fix appendable: check whether last val was a histogram

When appending a float, we were checking whether lastValue was equal to
current value, but we didn't check whether last value was a float value.

Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>
2024-08-07 15:02:59 +02:00

63 lines
2.1 KiB
Go

// Copyright 2014 The Prometheus Authors
// 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 storage
import "fmt"
type errDuplicateSampleForTimestamp struct {
timestamp int64
existing float64
existingIsHistogram bool
newValue float64
}
func NewDuplicateFloatErr(t int64, existing, newValue float64) error {
return errDuplicateSampleForTimestamp{
timestamp: t,
existing: existing,
newValue: newValue,
}
}
// NewDuplicateHistogramToFloatErr describes an error where a new float sample is sent for same timestamp as previous histogram.
func NewDuplicateHistogramToFloatErr(t int64, newValue float64) error {
return errDuplicateSampleForTimestamp{
timestamp: t,
existingIsHistogram: true,
newValue: newValue,
}
}
func (e errDuplicateSampleForTimestamp) Error() string {
if e.timestamp == 0 {
return "duplicate sample for timestamp"
}
if e.existingIsHistogram {
return fmt.Sprintf("duplicate sample for timestamp %d; overrides not allowed: existing is a histogram, new value %g", e.timestamp, e.newValue)
}
return fmt.Sprintf("duplicate sample for timestamp %d; overrides not allowed: existing %g, new value %g", e.timestamp, e.existing, e.newValue)
}
// Is implements the anonymous interface checked by errors.Is.
// Every errDuplicateSampleForTimestamp compares equal to the global ErrDuplicateSampleForTimestamp.
func (e errDuplicateSampleForTimestamp) Is(t error) bool {
if t == ErrDuplicateSampleForTimestamp {
return true
}
if v, ok := t.(errDuplicateSampleForTimestamp); ok {
return e == v
}
return false
}