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from modoboa.lib.cryptutils import decrypt
class ConnectionsManager(type):
"""
Singleton pattern implementation.
This class is specialized in connection management.
"""
def __init__(self, name, bases, ctx):
super(ConnectionsManager, self).__init__(name, bases, ctx)
self.instances = {}
def __call__(self, **kwargs):
key = None
if "user" in kwargs:
key = kwargs["user"]
else:
return None
if key not in self.instances:
self.instances[key] = None
if "password" in kwargs:
kwargs["password"] = decrypt(kwargs["password"])
if self.instances[key] is None:
self.instances[key] = \
super(ConnectionsManager, self).__call__(**kwargs)
else:
self.instances[key].refresh(key, kwargs["password"])
return self.instances[key]
class ConnectionError(Exception):
pass