public bool KeyDelete(FileBasedKey key)
{
if (!ContainsKey(key))
return false;
File.Delete(MemoryFileFor(key));
return true;
}
public bool StringSet(FileBasedKey key, FileBasedValue value, TimeSpan? expiry, When when)
{
if (ContainsKey(key) && when == When.NotExists)
return false;
if (expiry.HasValue)
value = new FileBasedValueWithExpiry(value, DateTime.Now, expiry);
this[key] = value;
return true;
}
public FileBasedValueWithExpiry StringGetWithExpiry(FileBasedKey key)
{
return ContainsKey(key) ? this[key] as FileBasedValueWithExpiry : FileBasedValueWithExpiry.Null;
}
public FileBasedValue StringGet(FileBasedKey key)
{
return ContainsKey(key) ? this[key] : FileBasedValue.Null;
}
private void ClearValueIfExpired(FileBasedKey key)
{
var value = GetValueOfKey(key) as FileBasedValueWithExpiry;
if (value != null && value.IsExpired)
File.Delete(MemoryFileFor(key));
}
public Task<FileBasedValueWithExpiry> StringGetWithExpiryAsync(FileBasedKey key)
{
return Task.Run(() => StringGetWithExpiry(key));
}
public Task<bool> StringSetAsync(FileBasedKey key, FileBasedValue value, TimeSpan? expiry, When exists)
{
return Task.Run(() => StringSet(key, value, expiry, exists));
}
public Task<bool> KeyDeleteAsync(FileBasedKey key)
{
return Task.Run(() => KeyDelete(key));
}
private bool ContainsKey(FileBasedKey key)
{
EnsureFolderExists();
ClearValueIfExpired(key);
return File.Exists(MemoryFileFor(key));
}
