mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-12 11:28:55 +00:00
119 lines
3.6 KiB
Python
119 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
|
|
#
|
|
# Copyright (C) 2013 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/>.
|
|
|
|
import imp
|
|
import inspect
|
|
import pkgutil
|
|
from .modules import IModule
|
|
|
|
import logging
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class Module(object):
|
|
"""
|
|
Module representation for the module manager
|
|
|
|
:param name: module name
|
|
:param cls: module class to be instantiated when
|
|
the module is activated
|
|
"""
|
|
|
|
def __init__(self, name, cls):
|
|
|
|
self._name = name
|
|
self._cls = cls
|
|
|
|
@property
|
|
def name(self):
|
|
|
|
return self._name
|
|
|
|
@name.setter
|
|
def name(self, new_name):
|
|
self._name = new_name
|
|
|
|
def cls(self):
|
|
return self._cls
|
|
|
|
|
|
class ModuleManager(object):
|
|
"""
|
|
Manages modules
|
|
|
|
:param module_paths: path from where module are loaded
|
|
"""
|
|
|
|
def __init__(self, module_paths=['modules']):
|
|
|
|
self._modules = []
|
|
self._module_paths = module_paths
|
|
|
|
def load_modules(self):
|
|
"""
|
|
Finds all the possible modules (classes with IModule as a parent)
|
|
"""
|
|
|
|
for _, name, ispkg in pkgutil.iter_modules(self._module_paths):
|
|
if (ispkg):
|
|
log.debug("analyzing {} package directory".format(name))
|
|
try:
|
|
file, pathname, description = imp.find_module(name, self._module_paths)
|
|
module = imp.load_module(name, file, pathname, description)
|
|
classes = inspect.getmembers(module, inspect.isclass)
|
|
for module_class in classes:
|
|
if issubclass(module_class[1], IModule):
|
|
# make sure the module class has IModule as a parent
|
|
if module_class[1].__module__ == name:
|
|
log.info("loading {} module".format(module_class[0].lower()))
|
|
info = Module(name=module_class[0].lower(), cls=module_class[1])
|
|
self._modules.append(info)
|
|
except Exception:
|
|
log.critical("error while analyzing {} package directory".format(name), exc_info=1)
|
|
finally:
|
|
if file:
|
|
file.close()
|
|
|
|
def get_all_modules(self):
|
|
"""
|
|
Returns all modules.
|
|
|
|
:returns: list of Module objects
|
|
"""
|
|
|
|
return self._modules
|
|
|
|
def activate_module(self, module, *args, **kwargs):
|
|
"""
|
|
Activates a given module.
|
|
|
|
:param module: module to activate (Module object)
|
|
:param args: args passed to the module
|
|
:param kwargs: kwargs passed to the module
|
|
|
|
:returns: instantiated module class
|
|
"""
|
|
|
|
module_class = module.cls()
|
|
try:
|
|
module_instance = module_class(module.name, *args, **kwargs)
|
|
except Exception:
|
|
log.critical("error while activating the {} module".format(module.name), exc_info=1)
|
|
return None
|
|
log.info("activating the {} module".format(module.name))
|
|
return module_instance
|