swarmbucket: add get_builders api

appengine/cr-buildbucket/main.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 
 APP_DIR = os.path.dirname(os.path.abspath(__file__))
 import google
 
 google.__path__.insert(
@@ skipping 15 matching lines @@
 def create_html_app():  # pragma: no cover
   """Returns WSGI app that serves HTML pages."""
   app = webapp2.WSGIApplication(
     handlers.get_frontend_routes(), debug=utils.is_local_dev_server())
   gae_ts_mon.initialize(app, cron_module='backend')
   return app
 
 
 def create_endpoints_app():  # pragma: no cover
   """Returns WSGI app that serves cloud endpoints requests."""
-  return endpoints.api_server([api.BuildBucketApi, config.ConfigApi])
+  return endpoints.api_server([
+    api.BuildBucketApi, swarming.SwarmbucketApi, config.ConfigApi])
 
 
 def create_backend_app():  # pragma: no cover
   """Returns WSGI app for backend."""
   routes = handlers.get_backend_routes() + swarming.get_routes()
   app = webapp2.WSGIApplication(routes, debug=utils.is_local_dev_server())
   gae_ts_mon.initialize(app, cron_module='backend')
   gae_ts_mon.register_global_metrics([
       metrics.CURRENTLY_PENDING,
       metrics.CURRENTLY_RUNNING,
       metrics.LEASE_LATENCY,
       metrics.SCHEDULING_LATENCY,
   ])
   gae_ts_mon.register_global_metrics_callback(
       'send_metrics', metrics.send_all_metrics)
   return app
 
 
 def initialize():  # pragma: no cover
   """Bootstraps the global state and creates WSGI applications."""
   ereporter2.register_formatter()
   return create_html_app(), create_endpoints_app(), create_backend_app()