1 from abc import ABCMeta, abstractmethod
4 class VppObject(object):
5 """ Abstract vpp object """
6 __metaclass__ = ABCMeta
9 VppObjectRegistry().register(self)
12 def add_vpp_config(self):
13 """ Add the configuration for this object to vpp. """
17 def query_vpp_config(self):
18 """Query the vpp configuration.
20 :return: True if the object is configured"""
24 def remove_vpp_config(self):
25 """ Remove the configuration for this object from vpp. """
30 """ Return a unique string representing this object. """
34 class VppObjectRegistry(object):
35 """ Class which handles automatic configuration cleanup. """
39 self.__dict__ = self._shared_state
40 if not hasattr(self, "_object_registry"):
41 self._object_registry = []
42 if not hasattr(self, "_object_dict"):
43 self._object_dict = dict()
45 def register(self, o):
46 """ Register an object in the registry. """
47 if not o.unique_id() in self._object_dict:
48 self._object_registry.append(o)
49 self._object_dict[o.unique_id()] = o
51 print "not adding duplicate %s" % o
53 def remove_vpp_config(self, logger):
55 Remove configuration (if present) from vpp and then remove all objects
58 if not self._object_registry:
59 logger.info("No objects registered for auto-cleanup.")
61 logger.info("Removing VPP configuration for registered objects")
62 for o in reversed(self._object_registry):
63 if o.query_vpp_config():
64 logger.info("Removing %s", o)
67 logger.info("Skipping %s, configuration not present", o)
69 for o in self._object_registry:
70 if o.query_vpp_config():
72 self._object_registry = []
73 self._object_dict = dict()
75 logger.error("Couldn't remove configuration for object(s):")
78 raise Exception("Couldn't remove configuration for object(s): %s" %
79 (", ".join(str(x) for x in failed)))