def __init__(self, import_name, instance_path, config):
""" Initialize app
:param import_name: Declaring module nmae
:type import_name: str
:param instance_path: Application instance path
:type instance_path: str
:param config: Application configuration object
:type config: dict
"""
# Init app
self.app = OvercFlask(import_name,
template_folder='templates',
instance_path=instance_path,
static_folder='static',
static_url_path='/static'
)
self.app.config.update(config)
self.app.debug = config.get('DEBUG', False)
# Init DB
self.db_engine = init_db_engine(self.app.config['DATABASE'])
self.db = init_db_session_for_flask(self.db_engine, self.app)
# Globals
class DignioAppCtxGlobals(_AppCtxGlobals):
""" Flask `g` overrides """
app = self
db = self.db
self.app.app_ctx_globals_class = DignioAppCtxGlobals
# Blueprints
from .bps import api
from .bps import ui
self.app.register_blueprint(api.bp, url_prefix='/api')
self.app.register_blueprint(ui.bp, url_prefix='/ui')
def supervise_loop(app):
""" Supervisor main loop which performs background actions
:param app: Application
:type app: OvercApplication
"""
db_engine = init_db_engine(app.app.config['DATABASE'])
Session = init_db_session(db_engine)
lockfile = os.path.join(tempfile.gettempdir(), 'overc.lock')
while True:
sleep(3)
# Locking
with flock_timeout(lockfile, seconds=2):
# Supervise
ssn = Session()
try:
# TODO: receive notifications from the API for immediate supervision
supervise_once(app, ssn)
except Exception:
logger.exception('Supervise loop error')
finally:
Session.remove()
