def register_pair_of_links(entry):
"""
Register a binding of a permalink and a post_id.
The registration won't change, since the binding must be permanent.
"""
permalink = entry.get_html_link().href
blog_id = entry.get_blog_id()
post_id = entry.get_post_id()
# save the pair into the memcache, if it hasn't been stored.
if memcache.get(permalink) is None:
memcache.add(permalink, (blog_id, post_id))
# issue a task, if the pair hasn't been stored yet in the data store.
if model.get_post_id(permalink, blog_id) is None:
taskqueue.add(url='/store_pol',
params={'permalink': permalink, 'blog_id': blog_id})
def get_post_id(permalink, blog_id):
post_id = get_post_id_from_memcache(permalink, blog_id)
# if not exist in the memcache, then check the datastore.
if not post_id:
post_id = model.get_post_id(permalink, blog_id)
return post_id