SVCache
SVCache is a threadsafe, single-value cache with a simple but flexible API.
When there is no fresh value in the cache, an attempt to retrieve the value will block until a new value is loaded. Only a single goroutine will load a new value; other goroutines will block as necessary until the loading is complete.
SVCache also supports aynchronously loading a new value before a value has expired.
See the GoDoc for details.
Example
import "github.com/softwaretechnik-berlin/svcache"
demonstrateApi() {
cache := svcache.NewInMemory(func(previous Entry) Entry {
value, ok := determineNewValue()
if !ok {
return previous
}
now := time.Now()
return Entry{
Value: value,
BecomesRenewable: now.Add(3 * time.Minute),
Expires: now.Add(5 * time.Minute),
}
})
// Block for a value
value := cache.Get()
println(value)
// peek at the current value if available
if value, ok := cache.Peek(); ok {
println(value)
}
}
