Question

Is there a way to clear a session cache key for all users?

For example, I am storing the users currently selected shop item under the following session key “currentItem”. In the management area of the website, I decide to delete that particular shop item. I now want to invalidate all the “currentItem” cache entries across all sessions.

Is there a way to do this?

I realise the example I have given is a little contrived, but it gets the point across. I suspect one solution would be to use the normal Cache api to store all of the users current items. That way I could invalidate them when required.

thanks

Answer 1

You can’t get all the current Sessions from all users
(Frankly speaking, you can, but I don’t recommend this, and still you can read only InProc sessions this way).

So the only thing you can do is something like this:

• Store in Session only ID of the user cart
• Add item with corresponding ID to the Cache
• Then adding the item to the Cache, set the dependency to the Item
• Then just generate event to change whole carts in Cache.
• Also you should think about re-creating items if for some reasons Cache is being emptied – you should provide the CacheItemRemovedCallback callback for this event.