#!/usr/local/sbin/charm-env python3

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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 sys

from charmhelpers.core import hookenv, host
from charms.reactive import is_state


def fail(msg):
    hookenv.action_set({'outcome': 'failure'})
    hookenv.action_fail(msg)
    sys.exit()


if not is_state('spark.started'):
    msg = 'Spark is not started yet'
    fail(msg)

if not host.service_available('spark-history-server'):
    msg = 'Spark history service not available'
    fail(msg)

host.service_stop('spark-history-server')
