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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. 

 

 

""" 

OperationsInstance 

================== 

An instance of the LongRunningOperations Service. 

""" 

 

import logging 

 

from buildgrid._exceptions import InvalidArgumentError, NotFoundError 

from buildgrid._protos.google.longrunning import operations_pb2 

 

 

class OperationsInstance: 

 

def __init__(self, scheduler): 

self.__logger = logging.getLogger(__name__) 

 

self._scheduler = scheduler 

self._instance_name = None 

 

# --- Public API --- 

 

@property 

def instance_name(self): 

return self._instance_name 

 

@property 

def scheduler(self): 

return self._scheduler 

 

def register_instance_with_server(self, instance_name, server): 

"""Names and registers the operations instance with a given server.""" 

if self._instance_name is None: 

server.add_operations_instance(self, instance_name) 

 

self._instance_name = instance_name 

 

else: 

raise AssertionError("Instance already registered") 

 

def get_operation(self, job_name): 

try: 

operation = self._scheduler.get_job_operation(job_name) 

 

except NotFoundError: 

raise InvalidArgumentError("Operation name does not exist: [{}]".format(job_name)) 

 

return operation 

 

def list_operations(self, list_filter, page_size, page_token): 

# TODO: Pages 

# Spec says number of pages and length of a page are optional 

response = operations_pb2.ListOperationsResponse() 

 

operation_names = [operation_name for job_name in 

self._scheduler.list_current_jobs() for operation_name in 

self._scheduler.list_job_operations(job_name)] 

 

operations = [] 

for operation_name in operation_names: 

operation = self._scheduler.get_job_operation(operation_name) 

operations.append(operation) 

 

response.operations.extend(operations) 

 

return response 

 

def delete_operation(self, job_name): 

try: 

self._scheduler.delete_job_operation(job_name) 

 

except NotFoundError: 

raise InvalidArgumentError("Operation name does not exist: [{}]".format(job_name)) 

 

def cancel_operation(self, job_name): 

try: 

self._scheduler.cancel_job_operation(job_name) 

 

except NotFoundError: 

raise InvalidArgumentError("Operation name does not exist: [{}]".format(job_name))