mysql_client.py

from charmhelpers.relations import hook, RelationBase


class MysqlClient(RelationBase):
    cache_keys = ['host', 'port', 'user', 'password']

    @hook('relation-changed')
    def db_connectable(self):
        data = self.data_available(self.dsn_keys)
        if data:
            self.record("dsn",
                        "mysql:%(user)s@%(password)s/%(host)s:%(port)s" % data)
            self.set_state("%s.connectable" % self.current_relation_name)
        else:
            self.remove_state("%s.connectable" % self.current_relation_name)

    def create_table_space(self, name):
        """Can be called after the connectable event has been addressed."""
        self.relation_set('db_name', name)