This is a no-op right now, but we'll want the new structure for the
next commit, and splitting this out makes it a lot easier to read what
is actually changed in the next commit.
This change drops the memory used for Python processes run by Zulip in
development from about 1GB to 300MB on my laptop.
On the front of safety, http://pika.readthedocs.org/en/latest/faq.html
explains "Pika does not have any notion of threading in the code. If
you want to use Pika with threading, make sure you have a Pika
connection per thread, created in that thread. It is not safe to share
one Pika connection across threads.". Since this code only connects
to rabbitmq inside the individual threads, I believe this should be
safe.
Progress towards #32.
Apparently, our event queue garbage collection logic never actually
disconnected any existing handler objects.
We fix this by disconnecting the handler inside cleanup(), adding a
special check to avoid creating a pointless timeout object.
This line appears to have been lost in rebasing from the original
implementation of 1396eb7022faec4c2d91553800a35781a96dd5bd; so the
previous fix actually only addressed the issue in a rare exception
case.
Replaced calls to ifilterfalse by list comprehensions because
ifilterfalse is not part of python 3. Also changed some lists to sets
for faster lookup.
Refer to #256.
In 2ea0daab19, handlers were moved to
being tracked via the handlers_by_id dict, but nothing cleared this
dict, resulting in every handler object being leaked. Since a Tornado
process uses a different handler object for every request, this
resulted in a significant memory leak. We fix this by clearing the
handlers_by_id dict in the two code paths that would result in a
Tornado handler being de-allocated: the exception codepath and the
handler disconnect codepath.
Fixes#463.
Add a function email_allowed_for_realm that checks whether a user with
given email is allowed to join a given realm (either because the email
has the right domain, or because the realm is open), and use it
whenever deciding whether to allow adding a user to a realm.
This commit is not intended to change any behavior, except in one case
where the Zulip realm's domain was not being converted to lowercase.
While I believe this actually produced correct output since users are
always subscribed to streams within their realm, this code was
definitely wrong.
Discovered using the mypy type-checking tool.
At present, we only do a few simple checks on the client type inside
the event system, and this saves database/memcached queries.
Note that this preserves the structure of the marshalled name in
to_dict/from_dict as client_type to avoid an unnecessary migration.
Previously, client descriptors were referenced directly from the
handler object. Once we split the Tornado process into separate queue
and connection servers, these will no longer be in the same process,
so we need to reference them by ID instead.
This commit is somewhat ugly, but its purpose is to be early
preparation for splitting Tornado into a queue server and a frontend
server, and this code belongs, by and large, in the queue server
component.
