adjust worker for mysql, add more stable background process

app/worker.py

@@ -1,31 +1,37 @@
 import os
 from flask import Flask
-from misc import currDay
+from misc import currDay, datetime, time, timedelta
 from db import db, Period, Event
 from create_events import createEvents
-from apscheduler.schedulers.background import BlockingScheduler
-from apscheduler.triggers.cron import CronTrigger
+from apscheduler.schedulers.background import BackgroundScheduler
 
 basedir = os.path.abspath(os.path.dirname(__file__))
 
 app = Flask(__name__)
 app.config['SECRET_KEY'] = os.environ['SECRET_KEY']
 app.config['SQLALCHEMY_DATABASE_URI'] =\
-           'sqlite:///' + os.path.join(basedir, os.environ['SQLITE_DB'])
+           'mysql://' + os.environ['MYSQL_USER'] + \
+           ':' + os.environ['MYSQL_PASSWORD'] + \
+           '@' + os.environ['MYSQL_HOST'] + \
+           ':' + os.environ['MYSQL_PORT'] + \
+           '/' + os.environ['MYSQL_DB']
 app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 db.init_app(app)
 
-# declare BlockingScheduler
-sched = BlockingScheduler()
+# Calculate the next time the function should run (at the :59 mark of the next hour)
+now = datetime.now()
+next_hour = now.replace(hour=now.hour + 1, minute=0, second=0, microsecond=0)
+next_run = next_hour - timedelta(minutes=1)
 
-# run createEvents upon app launch
+# Create scheduler and add job to call createEvents at the specified time
+scheduler = BackgroundScheduler()
+scheduler.add_job(createEvents, 'date', run_date=next_run, args=[db, currDay, Period, Event])
+scheduler.start()
+
+# Call createEvents on initial launch of the script
 with app.app_context():
     createEvents(db, currDay, Period, Event)
 
-def eventsTask():
-    with app.app_context():
-        createEvents(db, currDay, Period, Event)
-sched.add_job(eventsTask, CronTrigger.from_crontab('00 * * * *'))
-print("Background worker started")
-sched.start()
-
+# Keep the program running indefinitely
+while True:
+    time.sleep(60)