Make devices module export a blueprint for better modularity

app/__init__.py

@@ -1,21 +1,12 @@
-import atexit
 from flask import Flask
 from flask_sqlalchemy import SQLAlchemy
-from app.mod_devices import setup_mqtt, tear_down_mqtt
+from app.mod_devices import setup_mqtt, tear_down_mqtt, devices
 
 app = Flask(__name__, instance_relative_config=True)
 app.config.from_object('config')
 app.config.from_pyfile('config.py')
 db = SQLAlchemy(app)
-
+app.register_blueprint(devices, url_prefix='/devices')
-
-def on_stop():
-    print('Application stopping')
-    tear_down_mqtt()
-
-
-setup_mqtt(app)
-atexit.register(on_stop)
 
 
 @app.route("/")

app/mod_devices/__init__.py

@@ -1,10 +1,23 @@
+import atexit
+from flask import Blueprint
 from flask_mqtt import Mqtt
 
+devices = Blueprint('devices', __name__)
 mqtt = Mqtt()
 
+def on_stop():
+    tear_down_mqtt()
 
-def setup_mqtt(app):
+atexit.register(on_stop)
-    mqtt.init_app(app)
+
+@devices.route("/")
+def hello():
+    return "Hello from devices!"
+
+
+@devices.record
+def setup_mqtt(setup_state):
+    mqtt.init_app(setup_state.app)
     mqtt.client.on_message = handle_mqtt_message
     mqtt.client.on_subscribe = handle_subscribe
     print('MQTT client initialized')

config.py

@@ -6,7 +6,7 @@ import os
 BASE_DIR = os.path.abspath(os.path.dirname(__file__))  
 
 # Define the database - we are working with
-SQLALCHEMY_DATABASE_URI = 'sqlite:///' + os.path.join(BASE_DIR, 'app.db')
+SQLALCHEMY_DATABASE_URI = os.environ['DATABASE_URL']
 DATABASE_CONNECT_OPTIONS = {}
 
 # Application threads. A common general assumption is

requirements.txt

@@ -1,13 +1,18 @@
+alembic==0.9.9
 click==6.7
 Flask==0.12.2
+Flask-Migrate==2.1.1
 Flask-MQTT==1.0.3
-greenlet==0.4.13
+Flask-SQLAlchemy==2.3.2
 itsdangerous==0.24
 Jinja2==2.10
+Mako==1.0.7
 MarkupSafe==1.0
-msgpack==0.5.6
-neovim==0.2.4
 paho-mqtt==1.3.1
+psycopg2==2.7.4
+python-dateutil==2.7.2
+python-editor==1.0.3
+six==1.11.0
+SQLAlchemy==1.2.7
 typing==3.6.4
-virtualenv==15.2.0
 Werkzeug==0.14.1