provides.py

# 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.

from charms.reactive import RelationBase
from charms.reactive import hook
from charms.reactive import scopes


class ZookeeperProvides(RelationBase):
    # Every unit connecting will get the same information
    scope = scopes.GLOBAL

    # Use some template magic to declare our relation(s)
    @hook('{provides:zookeeper}-relation-joined')
    def joined(self):
        self.set_state('{relation_name}.joined')

    @hook('{provides:zookeeper}-relation-changed')
    def changed(self):
        self.set_state('{relation_name}.ready')

    @hook('{provides:zookeeper}-relation-departed')
    def departed(self):
        self.remove_state('{relation_name}.ready')
        self.remove_state('{relation_name}.joined')

    def send_port(self, port, rest_port):
        conv = self.conversation()
        conv.set_remote(data={
            'port': port,
            'rest_port': rest_port,
        })