/// <summary>
/// Tells if an object exists in cache
/// </summary>
/// <param name="keys">a string[] of keys</param>
public static bool Contains(string mainKey, params string[] keys)
{
// create a new cache item object from factory based on expiration and keys
ICacheItem item = CacheItemFactory.Item(mainKey, keys);
return(MemoryCacheAccess.Current.Contains(item));
}
/// <summary>
/// Gets an object from the cache
/// </summary>
/// <typeparam name="T">type of the object to return</typeparam>
/// <param name="keys">a string[] of keys</param>
public static T Get <T>(string mainKey, params string[] keys)
{
// create a new cache item object from factory based on expiration and keys
ICacheItem item = CacheItemFactory.Item(mainKey, keys);
// return an object from the cache
return((T)MemoryCacheAccess.Current[item]);
}
/// <summary>
/// Adds an object into the cache
/// </summary>
/// <typeparam name="T">type of the object to add</typeparam>
/// <param name="expirationInMinute">expiration in minutes</param>
/// <param name="keys">a string[] of keys</param>
public static void Add <T>(string mainKey, T value, int expirationInMinute, params string[] keys)
{
// create a new cache item object from factory based on expiration and keys
ICacheItem item = CacheItemFactory.Item(mainKey, keys);
// add a new one with this signature (item.Key) with the value handled from
// delegate method
MemoryCacheAccess.Current.AddData(item, value, expirationInMinute);
}
/// <summary>
/// return a cached object
/// </summary>
/// <typeparam name="IResponseType">type of the object to return</typeparam>
/// <param name="fromDataAccessMethod">generic delegate() to call if object does not exists or cache not active</param>
/// <param name="expirationInSeconds">expiration in seconds</param>
/// <param name="keys">a string[] of keys</param>
/// <returns>the cached object of type T</returns>
public static IResponseType GetItemSeconds <IResponseType>(Func <IResponseType> fromDataAccessMethod, int expirationInSeconds, string mainKey, params string[] keys)
{
// create a new cache item object from factory based on expiration and keys
ICacheItem item = CacheItemFactory.Item(mainKey, keys);
// if default cache manager does not contains the key (the signature of cache item based
// on cache protocol),
if (!MemoryCacheAccess.Current.Contains(item))
{
// add a new one with this signature (item.Key) with the value handled from
// delegate method
MemoryCacheAccess.Current.AddDataSeconds(item, fromDataAccessMethod(), expirationInSeconds);
}
// in all the cases, return object from the cache
return((IResponseType)MemoryCacheAccess.Current[item]);
}
