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Remove HA config from router. Fixes #2566
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/* | ||
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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