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gns3-server/gns3server/controller/__init__.py

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#!/usr/bin/env python
#
# Copyright (C) 2016 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from ..config import Config
class Controller:
"""The controller manage multiple gns3 servers"""
def isEnabled(self):
"""
:returns: True if current instance is the controller
of our GNS3 infrastructure.
"""
return Config.instance().get_section_config("Server").getboolean("controller")
@staticmethod
def instance():
"""
Singleton to return only on instance of Controller.
:returns: instance of Controller
"""
if not hasattr(Controller, '_instance') or Controller._instance is None:
Controller._instance = Controller()
return Controller._instance