Reuse Resource from oslo

All methods of Resource class novaclient is equal to common code.
In the process of unification of the clients code we should
reuse common functionality from Oslo.

Related to blueprint common-client-library-2

Change-Id: I2b72c6b34a44dec3572ca8ad70e41e42a32d48c0

novaclient/base.py

@@ -30,9 +30,12 @@ import threading
 import six
 
 from novaclient import exceptions
+from novaclient.openstack.common.apiclient import base
 from novaclient.openstack.common import strutils
 from novaclient import utils
 
+Resource = base.Resource
+
 
 def getid(obj):
     """
@@ -410,92 +413,3 @@ class BootingManagerWithFind(ManagerWithFind):
 
         return self._create(resource_url, body, response_key,
                             return_raw=return_raw, **kwargs)
-
-
-class Resource(object):
-    """
-    A resource represents a particular instance of an object (server, flavor,
-    etc). This is pretty much just a bag for attributes.
-
-    :param manager: Manager object
-    :param info: dictionary representing resource attributes
-    :param loaded: prevent lazy-loading if set to True
-    """
-    HUMAN_ID = False
-    NAME_ATTR = 'name'
-
-    def __init__(self, manager, info, loaded=False):
-        self.manager = manager
-        self._info = info
-        self._add_details(info)
-        self._loaded = loaded
-
-        # NOTE(sirp): ensure `id` is already present because if it isn't we'll
-        # enter an infinite loop of __getattr__ -> get -> __init__ ->
-        # __getattr__ -> ...
-        if 'id' in self.__dict__ and len(str(self.id)) == 36:
-            self.manager.write_to_completion_cache('uuid', self.id)
-
-        human_id = self.human_id
-        if human_id:
-            self.manager.write_to_completion_cache('human_id', human_id)
-
-    @property
-    def human_id(self):
-        """Subclasses may override this provide a pretty ID which can be used
-        for bash completion.
-        """
-        if self.NAME_ATTR in self.__dict__ and self.HUMAN_ID:
-            name = getattr(self, self.NAME_ATTR)
-            if name is not None:
-                return strutils.to_slug(name)
-        return None
-
-    def _add_details(self, info):
-        for (k, v) in six.iteritems(info):
-            try:
-                setattr(self, k, v)
-                self._info[k] = v
-            except AttributeError:
-                # In this case we already defined the attribute on the class
-                pass
-
-    def __getattr__(self, k):
-        if k not in self.__dict__:
-            #NOTE(bcwaldon): disallow lazy-loading if already loaded once
-            if not self.is_loaded():
-                self.get()
-                return self.__getattr__(k)
-
-            raise AttributeError(k)
-        else:
-            return self.__dict__[k]
-
-    def __repr__(self):
-        reprkeys = sorted(k for k in self.__dict__.keys() if k[0] != '_' and
-                                                                k != 'manager')
-        info = ", ".join("%s=%s" % (k, getattr(self, k)) for k in reprkeys)
-        return "<%s %s>" % (self.__class__.__name__, info)
-
-    def get(self):
-        # set_loaded() first ... so if we have to bail, we know we tried.
-        self.set_loaded(True)
-        if not hasattr(self.manager, 'get'):
-            return
-
-        new = self.manager.get(self.id)
-        if new:
-            self._add_details(new._info)
-
-    def __eq__(self, other):
-        if not isinstance(other, self.__class__):
-            return False
-        if hasattr(self, 'id') and hasattr(other, 'id'):
-            return self.id == other.id
-        return self._info == other._info
-
-    def is_loaded(self):
-        return self._loaded
-
-    def set_loaded(self, val):
-        self._loaded = val