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##############################################################################
# Copyright (c) 2015 Huawei Technologies Co.,Ltd and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
from __future__ import absolute_import
import abc
import six
import yardstick.common.utils as utils
@six.add_metaclass(abc.ABCMeta)
class Context(object):
"""Class that represents a context in the logical model"""
list = []
@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)()
@abc.abstractmethod
def deploy(self):
"""Deploy context."""
@abc.abstractmethod
def undeploy(self):
"""Undeploy context."""
self._delete_context()
def _delete_context(self):
Context.list.remove(self)
@abc.abstractmethod
def _get_server(self, attr_name):
"""get server info by name from context
"""
@abc.abstractmethod
def _get_network(self, attr_name):
"""get network info by name from context
"""
@staticmethod
def get_server(attr_name):
"""lookup server info by name from context
attr_name: either a name for a server created by yardstick or a dict
with attribute name mapping when using external heat templates
"""
servers = (context._get_server(attr_name) for context in Context.list)
try:
return next(s for s in servers if s)
except StopIteration:
raise ValueError("context not found for server %r" %
attr_name)
@staticmethod
def get_context_from_server(attr_name):
"""lookup context info by name from node config
attr_name: either a name of the node created by yardstick or a dict
with attribute name mapping when using external templates
:returns Context instance
"""
servers = ((context._get_server(attr_name), context)
for context in Context.list)
try:
return next(con for s, con in servers if s)
except StopIteration:
raise ValueError("context not found for name %r" %
attr_name)
@staticmethod
def get_network(attr_name):
"""lookup server info by name from context
attr_name: either a name for a server created by yardstick or a dict
with attribute name mapping when using external heat templates
"""
networks = (context._get_network(attr_name) for context in Context.list)
try:
return next(n for n in networks if n)
except StopIteration:
raise ValueError("context not found for server %r" %
attr_name)
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