mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-10 07:34:04 -08:00
e3b775b78b
* Allow for BufferedSeriesIterator instances to be created without an underlying iterator, to simplify their usage. Signed-off-by: Alin Sinpalean <alin.sinpalean@gmail.com>
80 lines
1.7 KiB
Go
80 lines
1.7 KiB
Go
// Copyright 2017 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 (
|
|
"math"
|
|
|
|
"github.com/prometheus/prometheus/pkg/labels"
|
|
)
|
|
|
|
type noopQuerier struct{}
|
|
|
|
// NoopQuerier is a Querier that does nothing.
|
|
func NoopQuerier() Querier {
|
|
return noopQuerier{}
|
|
}
|
|
|
|
func (noopQuerier) Select(*SelectParams, ...*labels.Matcher) (SeriesSet, error) {
|
|
return NoopSeriesSet(), nil
|
|
}
|
|
|
|
func (noopQuerier) LabelValues(name string) ([]string, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func (noopQuerier) Close() error {
|
|
return nil
|
|
}
|
|
|
|
type noopSeriesSet struct{}
|
|
|
|
// NoopSeriesSet is a SeriesSet that does nothing.
|
|
func NoopSeriesSet() SeriesSet {
|
|
return noopSeriesSet{}
|
|
}
|
|
|
|
func (noopSeriesSet) Next() bool {
|
|
return false
|
|
}
|
|
|
|
func (noopSeriesSet) At() Series {
|
|
return nil
|
|
}
|
|
|
|
func (noopSeriesSet) Err() error {
|
|
return nil
|
|
}
|
|
|
|
type noopSeriesIterator struct{}
|
|
|
|
// NoopSeriesIt is a SeriesIterator that does nothing.
|
|
var NoopSeriesIt = noopSeriesIterator{}
|
|
|
|
func (noopSeriesIterator) At() (int64, float64) {
|
|
return math.MinInt64, 0
|
|
}
|
|
|
|
func (noopSeriesIterator) Seek(t int64) bool {
|
|
return false
|
|
}
|
|
|
|
func (noopSeriesIterator) Next() bool {
|
|
return false
|
|
}
|
|
|
|
func (noopSeriesIterator) Err() error {
|
|
return nil
|
|
}
|