Attempt to reduce number of database connections to the database coming from Flask

twiderboard/flask_app.py

@@ -10,24 +10,28 @@ from datamodel import TrendyHashtag
 from datamodel import Tweet
 from datamodel import Member
 
-def connect():
-    """
-    Separated so that the method can be run in each created thread.
-    Initiates connexion to the database and starts a Session to be used to query it.
-    Returns the session used to communicate with the database
-    """
-    # creates engine, tries to create all the tables needed later on
-    engine = create_engine(data.engine_url, echo=data.debug)
-    # initiates session to the database, tries to create proper session
-    Session = sessionmaker(bind=engine)
+# def connect():
+#     """
+#     Separated so that the method can be run in each created thread.
+#     Initiates connexion to the database and starts a Session to be used to query it.
+#     Returns the session used to communicate with the database
+#     """
+#     # creates engine, tries to create all the tables needed later on
+#     engine = create_engine(data.engine_url, echo=data.debug)
+#     # initiates session to the database, tries to create proper session
+#     Session = sessionmaker(bind=engine)
 
-    return Session(), engine  # Bridges class to db
+#     return Session(), engine  # Bridges class to db
+
+engine = create_engine(data.engine_url, echo=data.debug)
+Session = sessionmaker(bind=engine)
+session = Session()
 
 
 @app.route('/nb_trendy')
 def nb_trendy():
 
-    session, engine = connect()
+    # session, engine = connect()
 
     # requests active hashtags
     query = session.query(func.count(TrendyHashtag.id)).filter(TrendyHashtag.active == True)
@@ -41,8 +45,8 @@ def nb_trendy():
     query = session.query(func.count(Member.id))
     members = query.first()[0]
 
-    session.close()
-    engine.dispose()
+    #session.close()
+    #engine.dispose()
 
     return jsonify(hashs=hashs, tweets=tweets, members=members)
 
@@ -59,5 +63,5 @@ def index():
     #return render_template('index_dyn.html')
     return render_template('statistics.html')
 
-if __name__ == '__main__':
-    app.run()
+#if __name__ == '__main__':
+#    app.run()