101 lines
3.0 KiB
Go
101 lines
3.0 KiB
Go
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package local
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import (
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"time"
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"github.com/prometheus/common/model"
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"golang.org/x/net/context"
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"github.com/prometheus/prometheus/storage/metric"
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)
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// NoopStorage is a dummy storage for use when Prometheus's local storage is
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// disabled. It throws away any appended samples and returns empty results.
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type NoopStorage struct{}
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// Start implements Storage.
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func (s *NoopStorage) Start() (err error) {
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return nil
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}
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// Stop implements Storage.
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func (s *NoopStorage) Stop() error {
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return nil
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}
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// WaitForIndexing implements Storage.
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func (s *NoopStorage) WaitForIndexing() {
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}
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// Querier implements Storage.
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func (s *NoopStorage) Querier() (Querier, error) {
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return &NoopQuerier{}, nil
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}
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// NoopQuerier is a dummy Querier for use when Prometheus's local storage is
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// disabled. It is returned by the NoopStorage Querier method and always returns
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// empty results.
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type NoopQuerier struct{}
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// Close implements Querier.
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func (s *NoopQuerier) Close() error {
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return nil
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}
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// LastSampleForLabelMatchers implements Querier.
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func (s *NoopQuerier) LastSampleForLabelMatchers(ctx context.Context, cutoff model.Time, matcherSets ...metric.LabelMatchers) (model.Vector, error) {
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return nil, nil
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}
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// QueryRange implements Querier
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func (s *NoopQuerier) QueryRange(ctx context.Context, from, through model.Time, matchers ...*metric.LabelMatcher) ([]SeriesIterator, error) {
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return nil, nil
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}
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// QueryInstant implements Querier.
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func (s *NoopQuerier) QueryInstant(ctx context.Context, ts model.Time, stalenessDelta time.Duration, matchers ...*metric.LabelMatcher) ([]SeriesIterator, error) {
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return nil, nil
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}
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// MetricsForLabelMatchers implements Querier.
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func (s *NoopQuerier) MetricsForLabelMatchers(
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ctx context.Context,
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from, through model.Time,
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matcherSets ...metric.LabelMatchers,
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) ([]metric.Metric, error) {
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return nil, nil
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}
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// LabelValuesForLabelName implements Querier.
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func (s *NoopQuerier) LabelValuesForLabelName(ctx context.Context, labelName model.LabelName) (model.LabelValues, error) {
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return nil, nil
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}
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// DropMetricsForLabelMatchers implements Storage.
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func (s *NoopStorage) DropMetricsForLabelMatchers(ctx context.Context, matchers ...*metric.LabelMatcher) (int, error) {
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return 0, nil
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}
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// Append implements Storage.
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func (s *NoopStorage) Append(sample *model.Sample) error {
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return nil
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}
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// NeedsThrottling implements Storage.
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func (s *NoopStorage) NeedsThrottling() bool {
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return false
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}
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