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package cache
import (
"fmt"
"github.com/revel/revel"
"github.com/robfig/go-cache"
"reflect"
"time"
)
type InMemoryCache struct {
cache.Cache
}
func NewInMemoryCache(defaultExpiration time.Duration) InMemoryCache {
return InMemoryCache{*cache.New(defaultExpiration, time.Minute)}
}
func (c InMemoryCache) Get(key string, ptrValue interface{}) error {
value, found := c.Cache.Get(key)
if !found {
return ErrCacheMiss
}
v := reflect.ValueOf(ptrValue)
if v.Type().Kind() == reflect.Ptr && v.Elem().CanSet() {
v.Elem().Set(reflect.ValueOf(value))
return nil
}
err := fmt.Errorf("revel/cache: attempt to get %s, but can not set value %v", key, v)
revel.ERROR.Println(err)
return err
}
func (c InMemoryCache) GetMulti(keys ...string) (Getter, error) {
return c, nil
}
func (c InMemoryCache) Set(key string, value interface{}, expires time.Duration) error {
// NOTE: go-cache understands the values of DEFAULT and FOREVER
c.Cache.Set(key, value, expires)
return nil
}
func (c InMemoryCache) Add(key string, value interface{}, expires time.Duration) error {
err := c.Cache.Add(key, value, expires)
if err == cache.ErrKeyExists {
return ErrNotStored
}
return err
}
func (c InMemoryCache) Replace(key string, value interface{}, expires time.Duration) error {
if err := c.Cache.Replace(key, value, expires); err != nil {
return ErrNotStored
}
return nil
}
func (c InMemoryCache) Delete(key string) error {
if found := c.Cache.Delete(key); !found {
return ErrCacheMiss
}
return nil
}
func (c InMemoryCache) Increment(key string, n uint64) (newValue uint64, err error) {
newValue, err = c.Cache.Increment(key, n)
if err == cache.ErrCacheMiss {
return 0, ErrCacheMiss
}
return
}
func (c InMemoryCache) Decrement(key string, n uint64) (newValue uint64, err error) {
newValue, err = c.Cache.Decrement(key, n)
if err == cache.ErrCacheMiss {
return 0, ErrCacheMiss
}
return
}
func (c InMemoryCache) Flush() error {
c.Cache.Flush()
return nil
}
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