public Task Write(StoreItems changes)
{
lock (_syncroot)
{
foreach (var change in changes)
{
StoreItem newValue = change.Value as StoreItem;
StoreItem oldValue = null;
if (_memory.TryGetValue(change.Key, out object x))
{
oldValue = x as StoreItem;
}
if (oldValue == null ||
newValue.eTag == "*" ||
oldValue.eTag == newValue.eTag)
{
// clone and set etag
newValue = newValue.Clone() as StoreItem;
newValue.eTag = (_eTag++).ToString();
_memory[change.Key] = newValue;
}
else
{
throw new Exception("etag conflict");
}
}
}
return(Task.CompletedTask);
}
