protected override Task OnRemoveAsync(CachedItem <T> item)
{
var path = toPath(item.Key);
File.Delete(path);
return(base.OnRemoveAsync(item));
}
internal static string ToJson <T>(this CachedItem <T> item)
{
var dto = new CachedItemDTO
{
Key = item.Key,
Expires = item.Expires.ToString("O"),
Value = JsonSerializer.Serialize(item.Value)
};
return(JsonSerializer.Serialize(dto));
}
public override async Task AddAsync(string key, T item, bool replace = false, DateTime?expires = null)
{
/* obsolete
* if (_loadingTcs.Task.Status != TaskStatus.RanToCompletion)
* {
* await base.AddAsync(key, item, expires);
* return;
* }
*/
await ifPreloading();
validateKey(key);
var path = toPath(key);
var cachedItem = new CachedItem <object>(key, item, expires ?? DateTime.MaxValue);
var json = cachedItem.ToJson();
File.WriteAllText(path, json);
await base.AddAsync(key, item, replace, expires);
}
/// <inheritdoc/>
public virtual async Task AddAsync(string key, T item, bool replace = false, DateTime?expires = null)
{
key ??= DefaultKey;
if (string.IsNullOrWhiteSpace(key))
{
throw new ArgumentNullException(nameof(key));
}
try
{
if (!replace && await ContainsAsync(key))
{
throw new ArgumentException($"Key already cached: \"{key}\".", nameof(key));
}
lock (_syncRoot)
_items[key] = new CachedItem <T>(key, item, expires ?? DateTime.MaxValue);
}
catch (Exception ex) // nisse
{
Console.WriteLine(ex);
throw;
}
}
/// <summary>
/// Called internally to remove an item from the cache.
/// Override this method to perform the removal logics of a derived cache.
/// </summary>
/// <param name="item">
/// The item to be removed.
/// </param>
protected virtual async Task OnRemoveAsync(CachedItem <T> item)
{
}
