# 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 json
class TaskSpec(object):
"""
The base class for a task specification.
MAX_DURATION_MS The longest duration we should use for a task specification.
"""
MAX_DURATION_MS=10000000
def __init__(self, start_ms, duration_ms):
"""
Create a new task specification.
:param start_ms: The target start time in milliseconds since the epoch.
:param duration_ms: The duration in milliseconds.
"""
self.message = {
'startMs': start_ms,
'durationMs': duration_ms
}
@staticmethod
def to_node_names(nodes):
"""
Convert an array of nodes or node names to an array of node names.
"""
node_names = []
for obj in nodes:
if isinstance(obj, str):
node_names.append(obj)
else:
node_names.append(obj.name)
return node_names
def __str__(self):
return json.dumps(self.message)