We had a few bugs where we were using a raw Django database query to
get a UserProfile object. This might seem OK, but going through
memcached is more efficient, and also guarantees that we get back the
.select_related() version of the object, so that if we later access
related fields like user_profile.realm.domain, we don't end up doing a
second database query as well.
Fixing these should in practice save a substantial number of database
queries on handling update_status_list requests, which happen very
often and access user_profile.realm.domain.
(imported from commit 0a2027da1b5bbc7a4f6c6927aca498530d7a4977)
When this is deployed to staging, we need to run
./manage.py logout_all_users --realm=humbughq.com
When this is deployed to prod, we need to run
./manage.py logout_all_users
(imported from commit d6c6ea4b1c347f3d9122742db23c7b67767a7349)
The policy this implements is:
* 1 week for most persistent data (Clients, etc.)
* 1 day for messages
(imported from commit d57bb2c6b9626ffa2155c6d0ef9b60827d1f2381)
Previously we only used these caches for Tornado requests, because we
were not updating memcached when e.g. the user's pointer changed, and
so functions like update_pointer would not work correctly.
Now that we are updated memcached when the User and UserProfile
objects change, we can use these for all requests.
This saves 2 database queries on every Django request to the server.
(imported from commit aa5bffd885d14bde38b95e80a226bd5ab66f253d)
This code adds a dependency on python-django-auth-openid, installable as
django-openid-auth from PyPI.
On prod, one needs to run a syncdb in order to create the required
tables. A database *migration* is not required, as these are new tables
only.
(imported from commit c902a0df8d589d93743b27e480154a04402b2c41)
This commit has the effect of eliminating all of the non-UserActivity
database queries from the Tornado process -- at least in the uncached
case.
This is safe to do, if a bit fragile, since our Tornado code only
accesses these objects (as opposed to their IDs) in a few places that
are all fine with old data, and I don't expect us to add any new ones
soon:
* UserActivity logging, which I plan to move out of Tornado entirely
* Checking whether we're authenticated in our decorators (which could
be simplified -- the actual security check is just whether the
Django session object has a particular field)
* Checking the user realm for whether we should sync to the client
notices about their Zephyr mirror being up to date, which is quite
static and I think we can move out of this code path.
But implementation constraints around mapping the user_ids to
user_profile_ids mean that it makes sense to get the actual objects
for now.
This code is not what I want to do long-term. I expect we'll be able
to clean up the dual User/UserProfile nonsense once we integrate the
upcoming Django 1.5 release, with its support for pluggable User
models, and after that I change, I expect it'll be fairly easy to make
the Tornado code only work with the user ID, not the actual objects.
(imported from commit 82e25b62fd0e3af7c86040600c63a4deec7bec06)
Scott Feeney
Tim Abbott
Luke Faraone
Zev Benjamin
Keegan McAllister