Files
tasks/common/dynamicconfig/cachedvalue.go
Alex ShtinandGitHub 8e8f1b0f7c Remove license header from every file (#7689)
## What changed?
<!-- Describe what has changed in this PR -->
Remove license header from every file. Because it is really hard to
follow in this PR here is the summary:
1. License header is removed from all `.go` and `.proto` files
:fireworks::fireworks:🎆.
2. `LICENSE` file in the root directory has only Temporal and Uber
copyrights.
3. 5 other `LICENSE` files added to the packages which have copyrights
different from Temporal and Uber: Datadog, Xargin, "Mat Ryer, Tyler
Bunnell and contributors".
4. `license_file` flag is removed from all code generation tools.
5. `copyright_file` flag is removed from `go:generate mockgen`
directive.
6. All copyright related targets are removed from `Makefile`.
7. Updated Temporal copyright year to 2025 everywhere.

## Why?
<!-- Tell your future self why have you made these changes -->
I double checked with legal department that it is not needed to have
license header in every file. One file per repo is enough. I put all
copyrights to the root `LICENSE` file and removed header from all other
files. Also updated tools and `Makefile`.
2025-05-01 18:50:21 -07:00

59 lines
1.8 KiB
Go

package dynamicconfig
import (
"fmt"
"sync/atomic"
"go.temporal.io/server/common/log/tag"
)
// GlobalCachedTypedValue holds a cached value of a GlobalTypedSetting after applying a supplied convert function.
// This type should be deleted after dynamicconfig handles conversion more efficiently.
type GlobalCachedTypedValue[T any] struct {
ptr atomic.Pointer[T]
cancel func()
}
// NewGlobalCachedTypedValue returns a new [GlobalCachedTypedValue] for the given setting, applying the given convert
// function on change.
// If convert returns an error the old value will be preserved. If convert never succeeds, Get() will return the zero
// value of T.
func NewGlobalCachedTypedValue[T, I any](c *Collection, setting GlobalTypedSetting[I], convert func(I) (T, error)) *GlobalCachedTypedValue[T] {
cachedValue := new(GlobalCachedTypedValue[T])
initial, cancel := setting.Subscribe(c)(func(i I) {
converted, err := convert(i)
if err != nil {
c.logger.Warn(fmt.Sprintf("Failed to convert %q attribute", setting.Key().String()), tag.Value(i), tag.Error(err))
return
}
// Make sure to only store the value on successful conversion.
cachedValue.ptr.Store(&converted)
})
cachedValue.cancel = cancel
converted, err := convert(initial)
if err != nil {
c.logger.Warn(fmt.Sprintf("Failed to convert %q attribute", setting.Key().String()), tag.Value(initial), tag.Error(err))
} else {
// Make sure to only store the value on successful conversion.
cachedValue.ptr.Store(&converted)
}
return cachedValue
}
// Get the last successfully converted cached value or the zero value if convert has never succeeded.
func (s *GlobalCachedTypedValue[T]) Get() T {
v := s.ptr.Load()
if v == nil {
var t T
return t
}
return *v
}
func (s *GlobalCachedTypedValue[T]) Close() error {
s.cancel()
return nil
}