prometheus/storage/noop.go

91 lines
2.3 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(bool, *SelectHints, ...*labels.Matcher) (SeriesSet, Warnings, error) {
return NoopSeriesSet(), nil, nil
}
func (noopQuerier) LabelValues(string) ([]string, Warnings, error) {
return nil, nil, nil
}
func (noopQuerier) LabelNames() ([]string, Warnings, error) {
return nil, nil, nil
}
func (noopQuerier) Close() error {
return nil
}
type noopChunkQuerier struct{}
// NoopChunkedQuerier is a ChunkQuerier that does nothing.
func NoopChunkedQuerier() ChunkQuerier {
return noopChunkQuerier{}
}
func (noopChunkQuerier) Select(bool, *SelectHints, ...*labels.Matcher) (ChunkSeriesSet, Warnings, error) {
return NoopChunkedSeriesSet(), nil, nil
}
func (noopChunkQuerier) LabelValues(string) ([]string, Warnings, error) {
return nil, nil, nil
}
func (noopChunkQuerier) LabelNames() ([]string, Warnings, error) {
return nil, nil, nil
}
func (noopChunkQuerier) 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 noopChunkedSeriesSet struct{}
// NoopChunkedSeriesSet is a ChunkSeriesSet that does nothing.
func NoopChunkedSeriesSet() ChunkSeriesSet {
return noopChunkedSeriesSet{}
}
func (noopChunkedSeriesSet) Next() bool { return false }
func (noopChunkedSeriesSet) At() ChunkSeries { return nil }
func (noopChunkedSeriesSet) Err() error { return nil }