tornado: Extract create_tornado_application helper.

zerver/management/commands/runtornado.py

@@ -19,10 +19,9 @@ from typing import Callable
 from zerver.lib.debug import interactive_debug_listen
 from zerver.lib.event_queue import process_notification, missedmessage_hook
 from zerver.lib.event_queue import setup_event_queue, add_client_gc_hook
-from zerver.lib.handlers import allocate_handler_id
 from zerver.lib.queue import setup_tornado_rabbitmq
-from zerver.lib.socket import get_sockjs_router, respond_send_message
-from zerver.tornado.handlers import AsyncDjangoHandler
+from zerver.lib.socket import respond_send_message
+from zerver.tornado.application import create_tornado_application
 
 import logging
 import sys
@@ -58,7 +57,7 @@ class Command(BaseCommand):
         interactive_debug_listen()
 
         import django
-        from tornado import httpserver, web
+        from tornado import httpserver
 
         try:
             addr, port = addrport.split(':')
@@ -98,17 +97,8 @@ class Command(BaseCommand):
                 queue_client.register_json_consumer('tornado_return', respond_send_message)
 
             try:
-                urls = (r"/notify_tornado",
-                        r"/json/events",
-                        r"/api/v1/events",
-                        )
-
                 # Application is an instance of Django's standard wsgi handler.
-                application = web.Application([(url, AsyncDjangoHandler) for url in urls]
-                                              + get_sockjs_router().urls,
-                                                debug=django.conf.settings.DEBUG,
-                                              # Disable Tornado's own request logging, since we have our own
-                                              log_function=lambda x: None)
+                application = create_tornado_application()
 
                 # start tornado web server in single-threaded mode
                 http_server = httpserver.HTTPServer(application,

zerver/tornado/application.py

@@ -0,0 +1,23 @@
+from __future__ import absolute_import
+from __future__ import print_function
+
+from django.conf import settings
+
+from zerver.lib.socket import get_sockjs_router
+from zerver.tornado.handlers import AsyncDjangoHandler
+
+import tornado.web
+
+def create_tornado_application():
+    # type: () -> tornado.web.Application
+    urls = (r"/notify_tornado",
+            r"/json/events",
+            r"/api/v1/events",
+    )
+
+    # Application is an instance of Django's standard wsgi handler.
+    return tornado.web.Application([(url, AsyncDjangoHandler) for url in urls]
+                                   + get_sockjs_router().urls,
+                                   debug=settings.DEBUG,
+                                   # Disable Tornado's own request logging, since we have our own
+                                   log_function=lambda x: None)