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informers.go
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/
informers.go
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//
// DISCLAIMER
//
// Copyright 2016-2022 ArangoDB GmbH, Cologne, Germany
//
// 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.
//
// Copyright holder is ArangoDB GmbH, Cologne, Germany
//
package k8sutil
import (
"reflect"
"sync"
"time"
"github.com/dalet-oss/arangodb-operator/pkg/util/timer"
)
type Informer interface {
WaitForCacheSync(stopCh <-chan struct{}) map[reflect.Type]bool
}
func WaitForInformers(stop <-chan struct{}, timeout time.Duration, informers ...Informer) {
done := make(chan struct{})
go func() {
defer close(done)
started := make(chan struct{})
go func() {
defer close(started)
var wg sync.WaitGroup
for id := range informers {
wg.Add(1)
go func(id int) {
defer wg.Done()
informers[id].WaitForCacheSync(stop)
}(id)
}
wg.Wait()
}()
select {
case <-started:
case <-timer.After(timeout):
}
}()
<-done
}