func main() {
cache := cache2go.Cache("myCache")
// The data loader gets called automatically whenever something
// tries to retrieve a non-existing key from the cache.
cache.SetDataLoader(func(key interface{}) *cache2go.CacheItem {
// Apply some clever loading logic here, e.g. read values for
// this key from database, network or file.
val := "This is a test with key " + key.(string)
// This helper method creates the cached item for us. Yay!
item := cache2go.CreateCacheItem(key, 0, val)
return &item
})
// Let's retrieve a few auto-generated items from the cache.
for i := 0; i < 10; i++ {
res, err := cache.Value("someKey_" + strconv.Itoa(i))
if err == nil {
fmt.Println("Found value in cache:", res.Data())
} else {
fmt.Println("Error retrieving value from cache:", err)
}
}
}
func main() {
// Accessing a new cache table for the first time will create it.
cache := cache2go.Cache("myCache")
// We will put a new item in the cache. It will expire after
// not being accessed via Value(key) for more than 5 seconds.
val := myStruct{"This is a test!", []byte{}}
cache.Cache("someKey", 5*time.Second, &val)
// Let's retrieve the item from the cache.
res, err := cache.Value("someKey")
if err == nil {
fmt.Println("Found value in cache:", res.Data().(*myStruct).text)
} else {
fmt.Println("Error retrieving value from cache:", err)
}
// Wait for the item to expire in cache.
time.Sleep(6 * time.Second)
res, err = cache.Value("someKey")
if err != nil {
fmt.Println("Item is not cached (anymore).")
}
// Add another item that never expires.
cache.Cache("someKey", 0, &val)
// cache2go supports a few handy callbacks and loading mechanisms.
cache.SetAboutToDeleteItemCallback(func(e *cache2go.CacheItem) {
fmt.Println("Deleting:", e.Key(), e.Data().(*myStruct).text, e.CreatedOn())
})
// Remove the item from the cache.
cache.Delete("someKey")
// And wipe the entire cache table.
cache.Flush()
}
func NewCacheStore() *CacheStore {
cache := cache2go.Cache("cacheStore")
return &CacheStore{cache: cache}
}