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# Copyright (C) 2018 Bloomberg LP 

# 

# 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. 

 

 

""" 

Execution Controller 

==================== 

 

An instance of the Execution controller. 

 

All this stuff you need to make the execution service work. 

 

Contains scheduler, execution instance, an interface to the bots 

and an operations instance. 

""" 

 

 

import logging 

 

from .scheduler import Scheduler 

from .bots.instance import BotsInterface 

from .execution.instance import ExecutionInstance 

from .operations.instance import OperationsInstance 

 

 

class ExecutionController: 

 

def __init__(self, data_store, *, storage=None, action_cache=None, action_browser_url=None, 

property_keys=None, bot_session_keepalive_timeout=None): 

self.__logger = logging.getLogger(__name__) 

 

scheduler = Scheduler(data_store, action_cache=action_cache, action_browser_url=action_browser_url) 

 

self._execution_instance = ExecutionInstance(scheduler, storage, property_keys) 

self._bots_interface = BotsInterface(scheduler, bot_session_keepalive_timeout=bot_session_keepalive_timeout) 

self._operations_instance = OperationsInstance(scheduler) 

 

def register_instance_with_server(self, instance_name, server): 

self._execution_instance.register_instance_with_server(instance_name, server) 

self._bots_interface.register_instance_with_server(instance_name, server) 

self._operations_instance.register_instance_with_server(instance_name, server) 

 

def stream_operation_updates(self, message_queue, operation_name): 

operation = message_queue.get() 

while not operation.done: 

yield operation 

operation = message_queue.get() 

yield operation 

 

def cancel_operation(self, name): 

# TODO: Cancel leases 

raise NotImplementedError("Cancelled operations not supported") 

 

@property 

def execution_instance(self): 

return self._execution_instance 

 

@property 

def bots_interface(self): 

return self._bots_interface 

 

@property 

def operations_instance(self): 

return self._operations_instance