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upgrade to latest dependencies (#2167)
bumping knative.dev/pkg 9039dc1...08fc626: > 08fc626 Fix comment for skipKeyError (# 2041) > 2bc944b Fix race: Make informed watcher start wait for Add event 🏎️ (# 2036) bumping knative.dev/serving 472f8e2...e9ea07e: > e9ea07e Only use exec probe at startup time (# 10741) > 6dcd8a6 Extend the e2e tests to use the new weighted averaging algorithms (# 10859) > 9478d4e Update net-contour nightly (# 10870) > 8e0ac01 Update net-kourier nightly (# 10869) > 092ddd9 Apply security best practises to domain-mapping-webhook (# 10867) > cd77781 Update net-kourier nightly (# 10863) > 2743018 Update net-istio nightly (# 10864) > f397d58 Use new filter function constructors (# 10862) > 26fd2fc upgrade to latest dependencies (# 10866) bumping knative.dev/eventing 2db6877...21bcd68: > 21bcd68 Add buckets example to config-leader-election CM (# 4993) > 0f2612e add test for trigger having a wrong UID (# 5004) > 4282f45 fix broken in-mem ns mode (# 4906) > 9089b8e adding code coverage to adapters v2 (# 5000) > eb12f8a update to breaking change for feature.T in reconciler-test (# 5003) > c5f92fa upgrade to latest dependencies (# 5001) > f220668 add more coverage (# 4999) > fba3dbf Use common script in GH Actions (# 4997) Signed-off-by: Knative Automation <[email protected]>
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112 changes: 112 additions & 0 deletions
112
vendor/knative.dev/pkg/configmap/informer/synced_callback.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| /* | ||
| Copyright 2021 The Knative Authors | ||
| 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. | ||
| */ | ||
|
|
||
| package informer | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
||
| "k8s.io/apimachinery/pkg/util/sets" | ||
| "k8s.io/apimachinery/pkg/util/wait" | ||
| ) | ||
|
|
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| // namedWaitGroup is used to increment and decrement a WaitGroup by name | ||
| type namedWaitGroup struct { | ||
| waitGroup sync.WaitGroup | ||
| keys sets.String | ||
| mu sync.Mutex | ||
| } | ||
|
|
||
| // newNamedWaitGroup returns an instantiated namedWaitGroup. | ||
| func newNamedWaitGroup() *namedWaitGroup { | ||
| return &namedWaitGroup{ | ||
| keys: sets.NewString(), | ||
| } | ||
| } | ||
|
|
||
| // Add will add the key to the list of keys being tracked and increment the wait group. | ||
| // If the key has already been added, the wait group will not be incremented again. | ||
| func (n *namedWaitGroup) Add(key string) { | ||
| n.mu.Lock() | ||
| defer n.mu.Unlock() | ||
|
|
||
| if !n.keys.Has(key) { | ||
| n.keys.Insert(key) | ||
| n.waitGroup.Add(1) | ||
| } | ||
| } | ||
|
|
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| // Done will decrement the counter if the key is present in the tracked keys. If it is not present | ||
| // it will be ignored. | ||
| func (n *namedWaitGroup) Done(key string) { | ||
| n.mu.Lock() | ||
| defer n.mu.Unlock() | ||
|
|
||
| if n.keys.Has(key) { | ||
| n.keys.Delete(key) | ||
| n.waitGroup.Done() | ||
| } | ||
| } | ||
|
|
||
| // Wait will wait for the underlying waitGroup to complete. | ||
| func (n *namedWaitGroup) Wait() { | ||
| n.waitGroup.Wait() | ||
| } | ||
|
|
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| // syncedCallback can be used to wait for a callback to be called at least once for a list of keys. | ||
| type syncedCallback struct { | ||
| // namedWaitGroup will block until the callback has been called for all tracked entities | ||
| namedWaitGroup *namedWaitGroup | ||
|
|
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| // callback is the callback that is intended to be called at least once for each key | ||
| // being tracked via WaitGroup | ||
| callback func(obj interface{}) | ||
| } | ||
|
|
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| // newSyncedCallback will return a syncedCallback that will track the provided keys. | ||
| func newSyncedCallback(keys []string, callback func(obj interface{})) *syncedCallback { | ||
| s := &syncedCallback{ | ||
| callback: callback, | ||
| namedWaitGroup: newNamedWaitGroup(), | ||
| } | ||
| for _, key := range keys { | ||
| s.namedWaitGroup.Add(key) | ||
| } | ||
| return s | ||
| } | ||
|
|
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| // Event is intended to be a wrapper for the actual event handler; this wrapper will signal via | ||
| // the wait group that the event handler has been called at least once for the key. | ||
| func (s *syncedCallback) Call(obj interface{}, key string) { | ||
| s.callback(obj) | ||
| s.namedWaitGroup.Done(key) | ||
| } | ||
|
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| // WaitForAllKeys will block until s.Call has been called for all the keys we are tracking or the stop signal is | ||
| // received. | ||
| func (s *syncedCallback) WaitForAllKeys(stopCh <-chan struct{}) error { | ||
| c := make(chan struct{}) | ||
| go func() { | ||
| defer close(c) | ||
| s.namedWaitGroup.Wait() | ||
| }() | ||
| select { | ||
| case <-c: | ||
| return nil | ||
| case <-stopCh: | ||
| return wait.ErrWaitTimeout | ||
| } | ||
| } |
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