// return true if this caller won the race to load whatever would go at key
private static bool GotCompeteLock(LocalCache cache, string key)
{
var competeKey = key + "-cload";
if (!cache.SetNXSync(competeKey, DateTime.UtcNow))
{
var x = cache.Get <DateTime>(competeKey);
// Somebody abandoned the lock, clear it and try again
if (DateTime.UtcNow - x > TimeSpan.FromMinutes(5))
{
cache.Remove(competeKey);
return(GotCompeteLock(cache, key));
}
// Lost the lock competition
return(false);
}
// winner, go do something expensive now
return(true);
}
