uwsgi: move init_db to uwsgi entry point

uwsgi will call the 'callable' function which should normally be
Flask.__call__().

But we need to init the db first, so make a wrapper function that inits
the db and then calls app()

Also refactor add_resource into for loop instead of reduce.  reduce is
not really approriate here since we aren't consuming the return value

JIRA: YARDSTICK-543

Change-Id: I692d6d42de09f7d6ecf1a67a22e3019d97a4f3ca
Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/api/server.py b/api/server.py
index be7963481..1d42feffb 100644
--- a/api/server.py
+++ b/api/server.py
@@ -10,7 +10,6 @@ from __future__ import absolute_import
 
 import inspect
 import logging
-from functools import reduce
 from six.moves import filter
 
 from flasgger import Swagger
@@ -38,6 +37,10 @@ def shutdown_session(exception=None):
     db_session.remove()
 
 
+for u in urlpatterns:
+    api.add_resource(u.resource, u.url, endpoint=u.endpoint)
+
+
 def init_db():
     def func(a):
         try:
@@ -52,8 +55,10 @@ def init_db():
     Base.metadata.create_all(bind=engine)
 
 
-reduce(lambda a, b: a.add_resource(b.resource, b.url,
-                                   endpoint=b.endpoint) or a, urlpatterns, api)
+def app_wrapper(*args, **kwargs):
+    init_db()
+    return app(*args, **kwargs)
+
 
 if __name__ == '__main__':
     _init_logging()