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Merge pull request #2579 from openziti/router-data-model-test
router data model test
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /* | ||
| Copyright NetFoundry Inc. | ||
| 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 | ||
| https://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. | ||
| */ | ||
|
|
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| package config | ||
|
|
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| import ( | ||
| "github.com/openziti/foundation/v2/concurrenz" | ||
| "sync" | ||
| ) | ||
|
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| type Listener[T any] interface { | ||
| NotifyChanged(init bool, old T, new T) | ||
| } | ||
|
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| type ListenerFunc[T any] func(init bool, old T, new T) | ||
|
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| func (f ListenerFunc[T]) NotifyChanged(init bool, old T, new T) { | ||
| f(init, old, new) | ||
| } | ||
|
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| func NewConfigValue[T comparable]() *Value[T] { | ||
| return &Value[T]{ | ||
| notifyInitialized: make(chan struct{}), | ||
| } | ||
| } | ||
|
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| type Value[T comparable] struct { | ||
| lock sync.Mutex | ||
| initialized bool | ||
| notifyInitialized chan struct{} | ||
| value concurrenz.AtomicValue[T] | ||
| listeners concurrenz.CopyOnWriteSlice[Listener[T]] | ||
| } | ||
|
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| func (self *Value[T]) Store(value T) { | ||
| self.lock.Lock() | ||
| defer self.lock.Unlock() | ||
|
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| first := !self.initialized | ||
| old := self.value.Swap(value) | ||
|
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| if first || old != value { | ||
| for _, l := range self.listeners.Value() { | ||
| l.NotifyChanged(first, old, value) | ||
| } | ||
| } | ||
|
|
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| if first { | ||
| self.initialized = true | ||
| close(self.notifyInitialized) | ||
| } | ||
| } | ||
|
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| func (self *Value[T]) Load() T { | ||
| return self.value.Load() | ||
| } | ||
|
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| func (self *Value[T]) AddListener(listener Listener[T]) { | ||
| self.lock.Lock() | ||
| defer self.lock.Unlock() | ||
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| self.listeners.Append(listener) | ||
|
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| if self.initialized { | ||
| listener.NotifyChanged(true, self.Load(), self.Load()) | ||
| } | ||
| } | ||
|
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| func (self *Value[T]) RemoveListener(listener Listener[T]) { | ||
| self.lock.Lock() | ||
| defer self.lock.Unlock() | ||
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| self.listeners.Delete(listener) | ||
| } | ||
|
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| func (self *Value[T]) GetInitNotifyChannel() <-chan struct{} { | ||
| return self.notifyInitialized | ||
| } |
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