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94 lines
2.6 KiB
94 lines
2.6 KiB
// Copyright 2013 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 retrieval |
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import ( |
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"github.com/prometheus/prometheus/config" |
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"github.com/prometheus/prometheus/pkg/labels" |
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"github.com/prometheus/prometheus/storage" |
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) |
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type nopAppendable struct{} |
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func (a nopAppendable) Appender() (storage.Appender, error) { |
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return nopAppender{}, nil |
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} |
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type nopAppender struct{} |
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func (a nopAppender) Add(labels.Labels, int64, float64) (uint64, error) { return 0, nil } |
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func (a nopAppender) AddFast(labels.Labels, uint64, int64, float64) error { return nil } |
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func (a nopAppender) Commit() error { return nil } |
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func (a nopAppender) Rollback() error { return nil } |
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// collectResultAppender records all samples that were added through the appender. |
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// It can be used as its zero value or be backed by another appender it writes samples through. |
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type collectResultAppender struct { |
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next storage.Appender |
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result []sample |
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} |
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func (a *collectResultAppender) AddFast(m labels.Labels, ref uint64, t int64, v float64) error { |
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if a.next == nil { |
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return storage.ErrNotFound |
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} |
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err := a.next.AddFast(m, ref, t, v) |
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if err != nil { |
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return err |
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} |
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a.result = append(a.result, sample{ |
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metric: m, |
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t: t, |
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v: v, |
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}) |
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return err |
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} |
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func (a *collectResultAppender) Add(m labels.Labels, t int64, v float64) (uint64, error) { |
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a.result = append(a.result, sample{ |
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metric: m, |
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t: t, |
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v: v, |
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}) |
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if a.next == nil { |
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return 0, nil |
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} |
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return a.next.Add(m, t, v) |
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} |
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func (a *collectResultAppender) Commit() error { return nil } |
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func (a *collectResultAppender) Rollback() error { return nil } |
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// fakeTargetProvider implements a TargetProvider and allows manual injection |
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// of TargetGroups through the update channel. |
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type fakeTargetProvider struct { |
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sources []string |
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update chan *config.TargetGroup |
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} |
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func (tp *fakeTargetProvider) Run(ch chan<- config.TargetGroup, done <-chan struct{}) { |
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defer close(ch) |
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for { |
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select { |
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case tg := <-tp.update: |
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ch <- *tg |
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case <-done: |
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return |
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} |
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} |
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} |
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func (tp *fakeTargetProvider) Sources() []string { |
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return tp.sources |
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}
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