private async Task SetKeyExpirationAsync(CSRedisClient client, string cacheKey, Func <ICacheItemExpiration> expiration)
{
var expiry = GetExpirationTime(expiration);
if (expiry != null)
{
await client.ExpireAsync(cacheKey, (int)expiry.Value.TotalSeconds);
}
else
{
await client.ExpireAsync(cacheKey, TimeSpan.MaxValue);
}
}
private async Task RefreshAsync(string key, DateTimeOffset?absExpr, TimeSpan?sldExpr, CancellationToken token = default(CancellationToken))
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
token.ThrowIfCancellationRequested();
// Note Refresh has no effect if there is just an absolute expiration (or neither).
TimeSpan?expr = null;
if (sldExpr.HasValue)
{
if (absExpr.HasValue)
{
var relExpr = absExpr.Value - DateTimeOffset.Now;
expr = relExpr <= sldExpr.Value ? relExpr : sldExpr;
}
else
{
expr = sldExpr;
}
await _redisClient.ExpireAsync(key, expr ?? TimeSpan.Zero);
// TODO: Error handling
}
}
public bool TryGetValue(string key, out byte[] value)
{
if (redisDB.HExists(this.Id, key))
{
value = redisDB.HGet <byte[]>(this.Id, key);
redisDB.ExpireAsync(this.Id, config.ExpireSeconds);
return(true);
}
else
{
value = null;
return(false);
}
}