public Task SetAsync(string key, byte[] value, DistributedCacheEntryOptions options)
{
DateTimeOffset? absoluteExpiration = null;
var currentTime = DateTimeOffset.UtcNow;
if (options.AbsoluteExpirationRelativeToNow.HasValue)
{
absoluteExpiration = currentTime.Add(options.AbsoluteExpirationRelativeToNow.Value);
}
else if (options.AbsoluteExpiration.HasValue)
{
if (options.AbsoluteExpiration.Value <= currentTime)
{
throw new ArgumentOutOfRangeException(
nameof(options.AbsoluteExpiration),
options.AbsoluteExpiration.Value,
"The absolute expiration value must be in the future.");
}
absoluteExpiration = options.AbsoluteExpiration;
}
var item = new CachedItem(partitionKey, key, value) { LastAccessTime = currentTime };
if (absoluteExpiration.HasValue)
{
item.AbsolutExperiation = absoluteExpiration;
}
if (options.SlidingExpiration.HasValue)
{
item.SlidingExperiation = options.SlidingExpiration;
}
var op = TableOperation.InsertOrReplace(item);
return this.azuretable.ExecuteAsync(op);
}
private bool ShouldDelete(CachedItem data)
{
var currentTime = DateTimeOffset.UtcNow;
if (data.AbsolutExperiation != null && data.AbsolutExperiation.Value <= currentTime)
{
return true;
}
if (data.SlidingExperiation.HasValue && data.LastAccessTime.HasValue && data.LastAccessTime.Value.Add(data.SlidingExperiation.Value) < currentTime)
{
return true;
}
return false;
}