Backend
public class Backend<T> where T : CacheCostCalculable
Represents a storage which stores a certain type of value in memory. It provides fast access,
but limited storing size. The stored value type needs to conform to CacheCostCalculable
,
and its cacheCost
will be used to determine the cost of size for the cache item.
You can config a MemoryStorage.Backend
in its initializer by passing a MemoryStorage.Config
value.
or modifying the config
property after it being created. The backend of MemoryStorage
has
upper limitation on cost size in memory and item count. All items in the storage has an expiration
date. When retrieved, if the target item is already expired, it will be recognized as it does not
exist in the storage. The MemoryStorage
also contains a scheduled self clean task, to evict expired
items from memory.
-
The config used in this storage. It is a value you can set and use to config the storage in air.
Declaration
Swift
public var config: Config { get set }
-
Creates a
MemoryStorage
with a givenconfig
.Declaration
Swift
public init(config: Config)
Parameters
config
The config used to create the storage. It determines the max size limitation, default expiration setting and more.