Ram Caching under Zope 3 - The return from the cache

I thaught this would be very complicated to set up memory caching in Zope 3, as I needed a tool that would be enough low level to be integrated into my objects.

Thread safeness... availabilty... _v_ prefix to avoid .....

But it's very simple in fact :

from zope.app.cache.ram import RAMCache

collection_name = 'BigObjects'
my_super_cache = RAMCache()

# caching
object_to_cache = BigObjectJustInRam()
my_super_cache.set(object_to_cache, 'unique_key', collection_name)

object_to_cache2 = BigObjectJustInRam()
my_super_cache.set(object_to_cache2, 'unique_key_2', collection_name)


# retrieving
the_return_from_the_cache = my_super_cache.query(collection_name, 'unique_key')
the_return_from_the_cache2 = my_super_cache.query(collection_name, 'unique_key_2')

# empty cache
my_super_cache.invalidate(collection_name)