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##############################################################################
# Copyright 2018 EuropeanSoftwareMarketingLtd.
# ===================================================================
# Licensed under the ApacheLicense, Version2.0 (the"License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
#
# software distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and limitations under
# the License
##############################################################################
import abc
import six
import vnftest.common.utils as utils
import yaml
@six.add_metaclass(abc.ABCMeta)
class Context(object):
"""Class that represents a context in the logical model"""
list = []
vnf_descriptor = {}
@classmethod
def load_vnf_descriptor(cls, vnf_descriptor_path):
with open(vnf_descriptor_path) as f:
cls.vnf_descriptor = yaml.safe_load(f)
@staticmethod
def split_name(name, sep='.'):
try:
name_iter = iter(name.split(sep))
except AttributeError:
# name is not a string
return None, None
return next(name_iter), next(name_iter, None)
def __init__(self):
Context.list.append(self)
@abc.abstractmethod
def init(self, attrs):
"""Initiate context."""
@staticmethod
def get_cls(context_type):
"""Return class of specified type."""
for context in utils.itersubclasses(Context):
if context_type == context.__context_type__:
return context
raise RuntimeError("No such context_type %s" % context_type)
@staticmethod
def get(context_type):
"""Returns instance of a context for context type.
"""
return Context.get_cls(context_type)()
def _delete_context(self):
Context.list.remove(self)
@abc.abstractmethod
def deploy(self):
"""Deploy context."""
@abc.abstractmethod
def undeploy(self):
"""Undeploy context."""
self._delete_context()
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