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"""
* 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.
"""
from __future__ import absolute_import
import copy
class ClientState(object):
COST_ACTIVE = 0.1
COST_STANDBY = 0.2
COST_LOAD = 0.5
def __init__(self, active_tasks=None, assigned_tasks=None,
prev_active_tasks=None, prev_assigned_tasks=None,
capacity=0.0):
self.active_tasks = active_tasks if active_tasks else set([])
self.assigned_tasks = assigned_tasks if assigned_tasks else set([])
self.prev_active_tasks = prev_active_tasks if prev_active_tasks else set([])
self.prev_assigned_tasks = prev_assigned_tasks if prev_assigned_tasks else set([])
self.capacity = capacity
self.cost = 0.0
def copy(self):
return ClientState(copy.deepcopy(self.active_tasks),
copy.deepcopy(self.assigned_tasks),
copy.deepcopy(self.prev_active_tasks),
copy.deepcopy(self.prev_assigned_tasks),
self.capacity)
def assign(self, task_id, active):
if active:
self.active_tasks.add(task_id)
self.assigned_tasks.add(task_id)
cost = self.COST_LOAD
try:
self.prev_assigned_tasks.remove(task_id)
cost = self.COST_STANDBY
except KeyError:
pass
try:
self.prev_active_tasks.remove(task_id)
cost = self.COST_ACTIVE
except KeyError:
pass
self.cost += cost
def __str__(self):
return "[active_tasks: (%s) assigned_tasks: (%s) prev_active_tasks: (%s) prev_assigned_tasks: (%s) capacity: (%s) cost: (%s)]" % (
self.active_tasks, self.assigned_tasks, self.prev_active_tasks, self.prev_assigned_tasks, self.capacity, self.cost)
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