public async Task <ISecret> GetSecretObjectAsync(string secretName, ILogger logger)
{
if (string.IsNullOrEmpty(secretName))
{
throw new ArgumentException("Null or empty secret name", nameof(secretName));
}
// If the cache contains the secret and it is not expired, return the cached value.
if (_cache.TryGetValue(secretName, out CachedSecret result) &&
!IsSecretOutdated(result))
{
return(result.Secret);
}
var start = DateTimeOffset.UtcNow;
// The cache does not contain a fresh copy of the secret. Fetch and cache the secret.
var updatedValue = new CachedSecret(await _internalReader.GetSecretObjectAsync(secretName));
var updatedSecret = _cache.AddOrUpdate(secretName, updatedValue, (key, old) => updatedValue).Secret;
logger?.LogInformation("Refreshed secret {SecretName}, Expiring at: {ExpirationTime}. Took {ElapsedMilliseconds}ms.",
updatedSecret.Name,
updatedSecret.Expiration == null ? "null" : ((DateTimeOffset)updatedSecret.Expiration).UtcDateTime.ToString(),
(DateTimeOffset.UtcNow - start).TotalMilliseconds.ToString("F2"));
return(updatedSecret);
}
public async Task <ISecret> GetSecretObjectAsync(string secretName)
{
if (string.IsNullOrEmpty(secretName))
{
throw new ArgumentException("Null or empty secret name", nameof(secretName));
}
// If the cache contains the secret and it is not expired, return the cached value.
if (_cache.TryGetValue(secretName, out CachedSecret result) &&
!IsSecretOutdated(result))
{
return(result.Secret);
}
// The cache does not contain a fresh copy of the secret. Fetch and cache the secret.
var updatedValue = new CachedSecret(await _internalReader.GetSecretObjectAsync(secretName));
return(_cache.AddOrUpdate(secretName, updatedValue, (key, old) => updatedValue).Secret);
}
private bool IsSecretOutdated(CachedSecret cachedSecret)
{
return(((DateTime.UtcNow - cachedSecret.CacheTime) >= _refreshInterval) ||
(cachedSecret.Secret.Expiration != null && (cachedSecret.Secret.Expiration - DateTime.UtcNow) <= _refreshIntervalBeforeExpiry));
}
private bool IsSecretOutdated(CachedSecret secret)
{
return((DateTime.UtcNow - secret.CacheTime) >= _refreshInterval);
}
