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Make the cache eviction logic for stale entities more robust

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Fixes #12458
This commit is contained in:
Bjørn Erik Pedersen 2024-05-03 11:04:57 +02:00
parent 68e95327f7
commit 503d20954f
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12 changed files with 157 additions and 55 deletions
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17
resources/resource.go
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@ -296,16 +296,19 @@ type hashProvider interface {
hash() string
}
var _ resource.StaleInfo = (*StaleValue[any])(nil)
type StaleValue[V any] struct {
// The value.
Value V
// IsStaleFunc reports whether the value is stale.
IsStaleFunc func() bool
// StaleVersionFunc reports the current version of the value.
// This always starts out at 0 and get incremented on staleness.
StaleVersionFunc func() uint32
}
func (s *StaleValue[V]) IsStale() bool {
return s.IsStaleFunc()
func (s *StaleValue[V]) StaleVersion() uint32 {
return s.StaleVersionFunc()
}
type AtomicStaler struct {
@ -313,11 +316,11 @@ type AtomicStaler struct {
}
func (s *AtomicStaler) MarkStale() {
atomic.StoreUint32(&s.stale, 1)
atomic.AddUint32(&s.stale, 1)
}
func (s *AtomicStaler) IsStale() bool {
return atomic.LoadUint32(&(s.stale)) > 0
func (s *AtomicStaler) StaleVersion() uint32 {
return atomic.LoadUint32(&(s.stale))
}
// For internal use.