Partial implementations of Guava Cache in Go.
Supported cache replacement policies:
- LRU
- Segmented LRU (default)
- TinyLFU (experimental)
The TinyLFU implementation is inspired by Caffeine by Ben Manes and go-tinylfu by Damian Gryski.
go get -u github.com/goburrow/cache
package main
import (
"fmt"
"math/rand"
"time"
"github.com/goburrow/cache"
)
func main() {
load := func(k cache.Key) (cache.Value, error) {
time.Sleep(100 * time.Millisecond) // Slow task
return fmt.Sprintf("%d", k), nil
}
// Create a loading cache
c := cache.NewLoadingCache(load,
cache.WithMaximumSize(100), // Limit number of entries in the cache.
cache.WithExpireAfterAccess(1*time.Minute), // Expire entries after 1 minute since last accessed.
cache.WithRefreshAfterWrite(2*time.Minute), // Expire entries after 2 minutes since last created.
)
getTicker := time.Tick(100 * time.Millisecond)
reportTicker := time.Tick(5 * time.Second)
for {
select {
case <-getTicker:
_, _ = c.Get(rand.Intn(200))
case <-reportTicker:
st := cache.Stats{}
c.Stats(&st)
fmt.Printf("%+v\n", st)
}
}
}