68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
/*
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Copyright 2025 The Kubernetes 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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package app
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import (
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"context"
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"sync"
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)
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// This file contains utility functions for implementing controller wrappers,
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// i.e. turning whatever logic into a Controller.
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type runFunc func(ctx context.Context)
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type runFuncSlice []runFunc
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func (rx runFuncSlice) Run(ctx context.Context) {
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var wg sync.WaitGroup
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wg.Add(len(rx))
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for _, fnc := range rx {
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go func() {
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defer wg.Done()
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fnc(ctx)
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}()
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}
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wg.Wait()
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}
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// concurrentRun returns a runFunc that wraps the given functions to run concurrently.
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func concurrentRun(rx ...runFunc) runFunc {
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return runFuncSlice(rx).Run
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}
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// controllerLoop implements the Controller interface. It makes it easy to turn a function into a Controller.
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type controllerLoop struct {
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name string
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run runFunc
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}
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func newControllerLoop(run runFunc, controllerName string) *controllerLoop {
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return &controllerLoop{
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name: controllerName,
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run: run,
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}
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}
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func (loop *controllerLoop) Name() string {
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return loop.name
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}
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func (loop *controllerLoop) Run(ctx context.Context) {
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loop.run(ctx)
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}
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