public Task <StoreItems> Read(string[] keys)
{
var storeItems = new StoreItems();
lock (_syncroot)
{
foreach (var key in keys)
{
if (_memory.TryGetValue(key, out object value))
{
if (value != null)
{
storeItems[key] = FlexObject.Clone(value);
}
else
{
storeItems[key] = null;
}
}
}
}
return(Task.FromResult(storeItems));
}
public Task Write(StoreItems changes)
{
lock (_syncroot)
{
foreach (var change in changes)
{
object newValue = change.Value;
object oldValue = null;
if (_memory.TryGetValue(change.Key, out object x))
{
oldValue = x;
}
IStoreItem newStoreItem = newValue as IStoreItem;
IStoreItem oldStoreItem = oldValue as IStoreItem;
if (oldValue == null ||
newStoreItem?.eTag == "*" ||
oldStoreItem?.eTag == newStoreItem?.eTag)
{
// clone and set etag
newValue = FlexObject.Clone(newValue);
newStoreItem = newValue as IStoreItem;
if (newStoreItem != null)
{
newStoreItem.eTag = (_eTag++).ToString();
}
_memory[change.Key] = newValue;
}
else
{
throw new Exception("etag conflict");
}
}
}
return(Task.CompletedTask);
}
