Question

I’m looking at writing a super-class for all my Google App Engine datastore classes that looks something like this:

class MemcacheMixin(object):
    @classmethod
    def cache_get_by_id(cls, id, parent=None):
        if memcache.has_key(...):
            ...
    ...

class MyEntity(db.Model, MemcacheMixin):
    ...

obj = MyEntity.cache_get_by_id(...)

The idea being that I’ll almost always want to cache datastore objects, and I don’t want to repeat myself. I assume someone must have already addressed this need and written a general-purpose tool for caching this stuff that integrates nicely into how the datastore classes work.

But, I haven’t found it. Any recommendations?

Answer 1

NDB (the new datastore library developer by Guido and included in the App Engine 1.6.1 SDK ) has builtin (memcache and memory) caching facilites.

See the documentation for more details.