GetOrAdd / GetOrAddAsync<T> should return null if the item ADDED.

[alastairtree]

GetOrAdd / GetOrAddAsync should return null if the item ADDED.

from lazycache.

[alastairtree]

Hi. Thanks for the suggestion. Wondering why you would want that/what problem it solves as i think that change would make the api less productive? The difference between LazyCache and ObjectCache is that in GetOrAddAsync we accept a delegate, not the actual value, so if we are adding to the cache the value has not been constructed yet. That means if we returned null you would not have a reference to it unless you kept hold of one in your delegate which feels messy to me. Or have I miss understood?

[alastairtree]

No reply for a while, closing.

[PureKrome]

Hi @alastairtree - it's been a while since I used this. So I can't remember the exact use case.

It was along the lines of something like:

• get item from cache.
• if item doesn't exist, then add to cache.
• now record WHAT happened

the problem is the last step. I don't know if the item was added or just retrieved.

I think that's why I created this issue.

[alastairtree]

In that case the "record what happened" code can be done inside the callback as that only gets executed when the item is actually generated for the cache?

[PureKrome]

I understand what you're suggesting and think that has merit - I just wondered if I had problems with that when I last tried it?

Sample code or some updated docs with an example?