rewrite worker to run on celery and redis

app/worker.py

@@ -1,9 +1,10 @@
+from celery import Celery
+from celery.schedules import crontab
+from create_events import createEvents
 import os
 from flask import Flask
 from misc import currDay, datetime, time, timedelta
 from db import db, Period, Event
-from create_events import createEvents
-from apscheduler.schedulers.background import BlockingScheduler
 
 basedir = os.path.abspath(os.path.dirname(__file__))
 
@@ -18,18 +19,24 @@ app.config['SQLALCHEMY_DATABASE_URI'] =\
 app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 db.init_app(app)
 
-# Define function to run create_events with app context
-def run_create_events():
+redis_url = 'redis://' + \
+            os.environ['REDIS_HOST'] + \
+            ':' + os.environ['REDIS_PORT'] + \
+            '/' + os.environ['REDIS_DBNUM']
+
+celerymsg = Celery('tasks', backend=redis_url, broker=redis_url)
+
+# Task definitions
+@celerymsg.task
+def runCreateEvents():
     with app.app_context():
         createEvents(db, currDay, Period, Event)
 
-# Call createEvents on initial launch of the script
-run_create_events()
-
-
-# Set up scheduler to run function at 59th minute of every hour
-scheduler = BlockingScheduler()
-scheduler.add_job(run_create_events, 'cron', minute=59)
-
-# Start scheduler
-scheduler.start()
+# Scheduled tasks
+celerymsg.conf.beat_schedule = {
+    'hourly-createevents': {
+        'task': 'worker.runCreateEvents',
+        # Run hourly
+        'schedule': crontab(hour="*"),
+    }
+}