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#
# -------------------------------------------------------------------------
# Copyright (c) 2019 AT&T Intellectual Property
#
# 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.
#
# -------------------------------------------------------------------------
#
class ExclusivityFilter(object):
def __init__(self):
self.name = "exclusivity"
self.exclusivity_id = None
self.status = None
def init_condition(self):
self.exclusivity_id = None
self.status = None
def check_pre_condition(self, _level, _v, _avail_hosts, _avail_groups):
exclusivities = _v.get_exclusivities(_level)
if len(exclusivities) > 1:
self.status = "multiple exclusivities for node = " + _v.vid
return False
if len(exclusivities) == 1:
ex_group = exclusivities[list(exclusivities)[0]]
if ex_group.level == _level:
self.exclusivity_id = ex_group.vid
if self.exclusivity_id is not None:
return True
else:
return False
def filter_candidates(self, _level, _v, _candidate_list):
candidate_list = self._get_candidates(_level, _candidate_list)
return candidate_list
def _get_candidates(self, _level, _candidate_list):
candidate_list = []
for c in _candidate_list:
if self._check_exclusive_candidate(_level, c) is True or \
self._check_empty(_level, c) is True:
candidate_list.append(c)
return candidate_list
def _check_exclusive_candidate(self, _level, _candidate):
memberships = _candidate.get_memberships(_level)
for gk, gr in memberships.items():
if gr.group_type == "exclusivity" and gk == self.exclusivity_id:
return True
return False
def _check_empty(self, _level, _candidate):
num_of_placed_servers = _candidate.get_num_of_placed_servers(_level)
if num_of_placed_servers == 0:
return True
return False
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