support-organizer/backend/fgo-request-manager/app.py

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# pylint: disable=too-few-public-methods
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from datetime import datetime
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from flask import Flask
from flask_smorest import Api
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from .config import APISettings
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class IsSingletonException(Exception):
pass
class Application:
"""
This is a singleton that can be accessed using get_instance()
It has 2 properties
- app: Used for WSGI servers and such
- api: Used for Blueprints
"""
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__instance = None
app = Flask(__name__)
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app.config.from_object(APISettings)
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api = None
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alive_since = None
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@staticmethod
def get_instance():
if Application.__instance is None:
Application()
return Application.__instance
def __init__(self):
if Application.__instance is not None:
raise IsSingletonException("This class is a singleton")
Application.__instance = self
self.api = Api(self.app)
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self.alive_since = datetime.now()