mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-27 22:49:40 -08:00
48a7a00a38
* Fast path the merge querier such that it is completely removed from query path when there is no remote storage. * Add NoopQuerier * Add copyright notice. * Avoid global, use a function.
55 lines
1.3 KiB
Go
55 lines
1.3 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 "github.com/prometheus/prometheus/pkg/labels"
|
|
|
|
type noopQuerier struct{}
|
|
|
|
// NoopQuerier is a Querier that does nothing.
|
|
func NoopQuerier() Querier {
|
|
return noopQuerier{}
|
|
}
|
|
|
|
func (noopQuerier) Select(...*labels.Matcher) SeriesSet {
|
|
return NoopSeriesSet()
|
|
}
|
|
|
|
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
|
|
}
|