mirror of
https://github.com/django/daphne.git
synced 2025-10-31 07:47:25 +03:00
34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
from django.utils.module_loading import import_string
|
|
|
|
|
|
class InvalidChannelBackendError(ValueError):
|
|
pass
|
|
|
|
|
|
class BackendManager(object):
|
|
"""
|
|
Takes a settings dictionary of backends and initialises them.
|
|
"""
|
|
|
|
def __init__(self, backend_configs):
|
|
self.configs = backend_configs
|
|
self.backends = {}
|
|
|
|
def make_backend(self, name):
|
|
# Load the backend class
|
|
try:
|
|
backend_class = import_string(self.configs[name]['BACKEND'])
|
|
except KeyError:
|
|
raise InvalidChannelBackendError("No BACKEND specified for %s" % name)
|
|
except ImportError as e:
|
|
raise InvalidChannelBackendError("Cannot import BACKEND %r specified for %s" % (self.configs[name]['BACKEND'], name))
|
|
# Initialise and pass config
|
|
instance = backend_class(**{k.lower(): v for k, v in self.configs[name].items() if k != "BACKEND"})
|
|
instance.alias = name
|
|
return instance
|
|
|
|
def __getitem__(self, key):
|
|
if key not in self.backends:
|
|
self.backends[key] = self.make_backend(key)
|
|
return self.backends[key]
|