charm-interface-barbican-se.../requires.py

74 lines
2.7 KiB
Python

# Copyright 2018 Canonical Ltd
#
# 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.
# the reactive framework unfortunately does not grok `import as` in conjunction
# with decorators on class instance methods, so we have to revert to `from ...`
# imports
from charms.reactive import Endpoint, clear_flag, set_flag, when_any, when_not
class BarbicanSecretsRequires(Endpoint):
"""This is the Barbican 'end' of the relation."""
@when_any('endpoint.{endpoint_name}.changed.name',
'endpoint.{endpoint_name}.changed.reference',
'endpoint.{endpoint_name}.changed.data')
def new_plugin(self):
set_flag(
self.expand_name('{endpoint_name}.new-plugin'))
clear_flag(
self.expand_name('{endpoint_name}.changed.name'))
clear_flag(
self.expand_name('{endpoint_name}.changed.reference'))
clear_flag(
self.expand_name('{endpoint_name}.changed.data'))
@when_not('endpoint.{endpoint_name}.joined')
def broken(self):
clear_flag(
self.expand_name('{endpoint_name}.new-plugin'))
@property
def plugins(self):
for relation in self.relations:
for unit in relation.units:
name = unit.received['name']
reference = unit.received['reference']
data = unit.received['data']
if not (name and data):
continue
yield {
'name': name,
'reference': reference,
'data': data,
'relation_id': relation.relation_id,
'remote_unit_name': unit.unit_name,
}
@property
def plugins_string(self):
def plugin_name_or_reference():
for relation in self.relations:
for unit in relation.units:
name = unit.received['name']
reference = unit.received['reference']
data = unit.received['data']
if not (name and data):
continue
if reference:
yield reference
else:
yield name + '_plugin'
return ','.join(plugin_name_or_reference())