def obj_class_from_name(cls, objname, objver):
"""Returns a class from the registry based on a name and version."""
if objname not in cls._obj_classes:
LOG.error(
_LE('Unable to instantiate unregistered object type '
'%(objtype)s'), dict(objtype=objname))
raise exception.UnsupportedObjectError(objtype=objname)
# NOTE(comstud): If there's not an exact match, return the highest
# compatible version. The objects stored in the class are sorted
# such that highest version is first, so only set compatible_match
# once below.
compatible_match = None
for objclass in cls._obj_classes[objname]:
if objclass.VERSION == objver:
return objclass
if (not compatible_match
and versionutils.is_compatible(objver, objclass.VERSION)):
compatible_match = objclass
if compatible_match:
return compatible_match
# As mentioned above, latest version is always first in the list.
latest_ver = cls._obj_classes[objname][0].VERSION
raise exception.IncompatibleObjectVersion(objname=objname,
objver=objver,
supported=latest_ver)
def obj_class_from_name(cls, objname, objver):
"""Returns a class from the registry based on a name and version."""
if objname not in cls._obj_classes:
LOG.error(
_('Unable to instantiate unregistered object type '
'%(objtype)s') % dict(objtype=objname))
raise exception.UnsupportedObjectError(objtype=objname)
latest = None
compatible_match = None
for objclass in cls._obj_classes[objname]:
if objclass.VERSION == objver:
return objclass
version_bits = tuple([int(x) for x in objclass.VERSION.split(".")])
if latest is None:
latest = version_bits
elif latest < version_bits:
latest = version_bits
if versionutils.is_compatible(objver, objclass.VERSION):
compatible_match = objclass
if compatible_match:
return compatible_match
latest_ver = '%i.%i' % latest
raise exception.IncompatibleObjectVersion(objname=objname,
objver=objver,
supported=latest_ver)
def obj_from_primitive(cls, primitive, context=None):
"""Object field-by-field hydration."""
if primitive['nova_object.namespace'] != 'nova':
# NOTE(danms): We don't do anything with this now, but it's
# there for "the future"
raise exception.UnsupportedObjectError(
objtype='%s.%s' % (primitive['nova_object.namespace'],
primitive['nova_object.name']))
objname = primitive['nova_object.name']
objver = primitive['nova_object.version']
objclass = cls.obj_class_from_name(objname, objver)
return objclass._obj_from_primitive(context, objver, primitive)
def obj_class_from_name(cls, objname, objver):
"""Returns a class from the registry based on a name and version."""
if objname not in cls._obj_classes:
LOG.error(_('Unable to instantiate unregistered object type '
'%(objtype)s') % dict(objtype=objname))
raise exception.UnsupportedObjectError(objtype=objname)
compatible_match = None
for objclass in cls._obj_classes[objname]:
if objclass.VERSION == objver:
return objclass
if versionutils.is_compatible(objver, objclass.VERSION):
compatible_match = objclass
if compatible_match:
return compatible_match
raise exception.IncompatibleObjectVersion(objname=objname,
objver=objver)
def obj_from_primitive(cls, primitive, context=None):
"""Object field-by-field hydration."""
if primitive['nova_object.namespace'] != 'nova':
# NOTE(danms): We don't do anything with this now, but it's
# there for "the future"
raise exception.UnsupportedObjectError(
objtype='%s.%s' % (primitive['nova_object.namespace'],
primitive['nova_object.name']))
objname = primitive['nova_object.name']
objver = primitive['nova_object.version']
objdata = primitive['nova_object.data']
objclass = cls.obj_class_from_name(objname, objver)
self = objclass()
self._context = context
for name, field in self.fields.items():
if name in objdata:
setattr(self, name,
field.from_primitive(self, name, objdata[name]))
changes = primitive.get('nova_object.changes', [])
self._changed_fields = set([x for x in changes if x in self.fields])
return self
def obj_from_primitive(cls, primitive):
"""Simple base-case hydration.
This calls self._attr_from_primitive() for each item in fields.
"""
if primitive['nova_object.namespace'] != 'nova':
# NOTE(danms): We don't do anything with this now, but it's
# there for "the future"
raise exception.UnsupportedObjectError(
objtype='%s.%s' % (primitive['nova_object.namespace'],
primitive['nova_object.name']))
objname = primitive['nova_object.name']
objver = primitive['nova_object.version']
objdata = primitive['nova_object.data']
objclass = cls.obj_class_from_name(objname, objver)
self = objclass()
for name in self.fields:
if name in objdata:
setattr(self, name,
self._attr_from_primitive(name, objdata[name]))
changes = primitive.get('nova_object.changes', [])
self._changed_fields = set([x for x in changes if x in self.fields])
return self
