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# -------------------------------------------------------------------------
# Copyright (c) 2020 AT&T Intellectual Property
#
# 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.
#
# -------------------------------------------------------------------------
#
import json
import subprocess
import traceback
from datetime import datetime
from osdf.logging.osdf_logging import error_log, debug_log
from osdf.utils.file_utils import delete_file_folder
def py_solver(py_content, opt_info):
py_file = '/tmp/custom_heuristics_{}.py'.format(datetime.timestamp(datetime.now()))
with open(py_file, "wt") as f:
f.write(py_content)
if opt_info['optData'].get('json'):
data_content = json.dumps(opt_info['optData']['json'])
input_file = '/tmp/optim_engine_{}.json'.format(datetime.timestamp(datetime.now()))
elif opt_info['optData'].get('text'):
data_content = opt_info['optData']['text']
input_file = '/tmp/optim_engine_{}.txt'.format(datetime.timestamp(datetime.now()))
with open(input_file, "wt") as f:
f.write(data_content)
output_file = '/tmp/opteng_output_{}.json'.format(datetime.timestamp(datetime.now()))
command = ['python', py_file, input_file, output_file]
try:
p = subprocess.run(command, stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
debug_log.debug('Process return code {}'.format(p.returncode))
if p.returncode > 0:
error_log.error('Process return code {} {}'.format(p.returncode, p.stdout))
return 'error', {}
with open(output_file) as file:
data = file.read()
return 'success', json.loads(data)
except Exception as e:
error_log.error("Error running optimizer {}".format(traceback.format_exc()))
return 'error', {}
finally:
cleanup((input_file, output_file, py_file))
def cleanup(file_tup):
for f in file_tup:
try:
delete_file_folder(f)
except Exception as e:
error_log.error("Failed deleting the file {} - {}".format(f, traceback.format_exc()))
def solve(request_json, py_content):
req_info = request_json['requestInfo']
opt_info = request_json['optimInfo']
try:
status, solution = py_solver(py_content, opt_info)
response = {
'transactionId': req_info['transactionId'],
'requestID': req_info['requestID'],
'requestStatus': status,
'statusMessage': "completed",
'solutions': solution if solution else {}
}
return 200, json.dumps(response)
except Exception as e:
response = {
'transactionId': req_info['transactionId'],
'requestID': req_info['requestID'],
'requestStatus': 'failed',
'statusMessage': 'Failed due to {}'.format(e)
}
return 400, json.dumps(response)
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