95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
// 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/discovery/targetgroup"
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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 *targetgroup.Group
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}
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func (tp *fakeTargetProvider) Run(ch chan<- targetgroup.Group, 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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