public void Set(string key, byte[] value, DistributedCacheEntryOptions options)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
Connect();
SessionStateValue ssValue = new SessionStateValue();
ssValue.Value = value;
DateTime nowUtc = DateTime.UtcNow;
ssValue.LastAccessTimeUtc = nowUtc;
// No need to check stale or expired data when setting an absolute expiration.
// Think of if as setting a new key/value pair. Expired data will always be cleaned up
// when the CleanupExpiredData job runs.
if (options.AbsoluteExpiration != null)
{
//LogDebug("Inserting against key [" + key + "] with absolute expiration: " +
// options.AbsoluteExpiration.Value.DateTime);
DateTimeOffset dto = options.AbsoluteExpiration.Value;
ssValue.ExpirationTimeUtc = dto.DateTime + dto.Offset;
}
// If AbsoluteExpiration and AbsoluteExpirationRelativeToNow are set, use the latter.
if (options.AbsoluteExpirationRelativeToNow != null)
{
//LogDebug("Inserting against key [" + key + "] with absolute expiration: " +
// options.AbsoluteExpiration.Value.DateTime);
TimeSpan ts = options.AbsoluteExpirationRelativeToNow.Value;
ssValue.ExpirationTimeUtc = nowUtc + ts;
}
if (options.SlidingExpiration != null)
{
//LogDebug("Inserting against key [" + key + "] with absolute expiration: " +
// options.AbsoluteExpiration.Value.DateTime);
ssValue.SpanUntilStale = options.SlidingExpiration.Value;
}
_region.PutByteArray(key, ssValue.ToByteArray());
return;
}
public byte[] Get(string key)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
Connect();
// Check for nonexistent key
SessionStateValue ssValue = GetValueForKey(key);
if (ssValue == null)
{
return(null);
}
// Check for expired key
DateTime nowUtc = DateTime.UtcNow;
if (ssValue.ExpirationTimeUtc != DateTime.MinValue && ssValue.ExpirationTimeUtc < nowUtc)
{
return(null);
}
// Check for stale key
if (ssValue.SpanUntilStale != TimeSpan.Zero &&
nowUtc > (ssValue.LastAccessTimeUtc + ssValue.SpanUntilStale))
{
return(null);
}
//LogDebug("Inserting against key [" + key + "] with absolute expiration: " +
// options.AbsoluteExpiration.Value.DateTime);
// Update the times for sliding expirations
if (ssValue.SpanUntilStale != TimeSpan.Zero)
{
ssValue.LastAccessTimeUtc = nowUtc;
_region.PutByteArray(key, ssValue.ToByteArray());
}
return(ssValue.Value);
}
