deb-heat/heat/common/grouputils.py
Tetiana Lashchova 584e91fc51 Support path attributes in OS::Heat::AutoScalingGroup
Change-Id: I5cd6a711ae778dec1a205c6954efe57837a2db5c
Closes-Bug: #1400684
2015-02-06 13:06:43 +02:00

96 lines
3.0 KiB
Python

#
# Licensed under the Apache License, Version 2.0 (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
#
# Unless required by applicable law or agreed to in writing, 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 six
from heat.common import exception
def get_size(group, include_failed=False):
"""Get number of member resources managed by the specified group.
The size exclude failed members default, set include_failed=True
to get total size.
"""
if group.nested():
resources = [r for r in six.itervalues(group.nested())
if include_failed or r.status != r.FAILED]
return len(resources)
else:
return 0
def get_members(group):
"""Get a list of member resources managed by the specified group.
Sort the list of instances first by created_time then by name.
"""
resources = []
if group.nested():
resources = [r for r in six.itervalues(group.nested())
if r.status != r.FAILED]
return sorted(resources, key=lambda r: (r.created_time, r.name))
def get_member_refids(group, exclude=None):
"""Get a list of member resources managed by the specified group.
The list of resources is sorted first by created_time then by name.
"""
members = get_members(group)
if len(members) == 0:
return []
if exclude is None:
exclude = []
return [r.FnGetRefId() for r in members
if r.FnGetRefId() not in exclude]
def get_member_names(group):
"""Get a list of resource names of the resources in the specified group.
Failed resources will be ignored.
"""
return [r.name for r in get_members(group)]
def get_resource(stack, resource_name, use_indices, key):
nested_stack = stack.nested()
try:
if use_indices:
return get_members(stack)[int(resource_name)]
else:
return nested_stack[resource_name]
except (IndexError, KeyError):
raise exception.InvalidTemplateAttribute(resource=stack.name,
key=key)
def get_rsrc_attr(stack, key, use_indices, resource_name, *attr_path):
resource = get_resource(stack, resource_name, use_indices, key)
return resource.FnGetAtt(*attr_path)
def get_rsrc_id(stack, key, use_indices, resource_name):
resource = get_resource(stack, resource_name, use_indices, key)
return resource.FnGetRefId()
def get_nested_attrs(stack, key, use_indices, *path):
path = key.split(".", 2)[1:] + list(path)
if len(path) > 1:
return get_rsrc_attr(stack, key, use_indices, *path)
else:
return get_rsrc_id(stack, key, use_indices, *path)