[CCACHE-17] Create function backed cache Created: 16/Dec/11 Updated: 19/Dec/11
|Labels:||cache, fn-cache, new-feature|
A cache implementation that is backed by a function that performs some action on a cache miss could serve as a front for any of the existing cache impls.
|Comment by Rich Hickey [ 16/Dec/11 9:45 AM ]|
It doesn't perform an action per se, it gets a passed key and returns a value, which the cache then caches (associates with the key) and returns. The tricky bit is when the function can't get a value. There needs to be some protocol for communicating that (could be like 3 arg get), and, should the cache be asked again later for the same key, calling the fn again.
|Comment by Fogus [ 19/Dec/11 7:29 AM ]|
Thanks for the feedback Rich. I believe I understand the subtleties now.