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-rw-r--r--runtime/optim_engine.py79
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diff --git a/runtime/optim_engine.py b/runtime/optim_engine.py
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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.
+#
+# -------------------------------------------------------------------------
+#
+
+from flask import Response
+
+from osdf.operation.exceptions import BusinessException
+from .model_api import get_model_data
+from .models.api.optim_request import OptimizationAPI
+from .solvers.mzn.mzn_solver import solve as mzn_solve
+from .solvers.py.py_solver import solve as py_solve
+
+
+def is_valid_optim_request(request_json):
+ # Method to check whether the requestinfo/optimizer value is valid.
+ opt_info = request_json['optimInfo']
+ if not opt_info.get('modelId'):
+ if not opt_info.get('modelContent') or not opt_info.get('solver'):
+ raise BusinessException('modelContent and solver needs to be populated if model_id is not set')
+ if not opt_info.get('optData'):
+ raise BusinessException('optimInfo.optData needs to be populated to solve for a problem')
+
+ return True
+
+
+def validate_request(request_json):
+ OptimizationAPI(request_json).validate()
+ if not is_valid_optim_request(request_json):
+ raise BusinessException('Invalid optim request ')
+ return True
+
+
+def process_request(request_json):
+ response_code, response_message = run_optimizer(request_json)
+ response = Response(response_message, content_type='application/json; charset=utf-8')
+ response.headers.add('content-length', len(response_message))
+ response.status_code = response_code
+ return response
+
+
+def run_optimizer(request_json):
+ validate_request(request_json)
+
+ model_content, solver = get_model_content(request_json)
+
+ if solver == 'mzn':
+ return mzn_solve(request_json, model_content)
+ elif solver == 'py':
+ return py_solve(request_json, model_content)
+ raise BusinessException('Unsupported optimization solver requested {} '.format(solver))
+
+
+def get_model_content(request_json):
+ model_id = request_json['optimInfo'].get('modelId')
+ if model_id:
+ status, data = get_model_data(model_id)
+ if status == 200:
+ model_content = data[1]
+ solver = data[3]
+ else:
+ raise BusinessException('model_id [{}] not found in the model database'.format(model_id))
+ else:
+ model_content = request_json['optimInfo']['modelContent']
+ solver = request_json['optimInfo']['solver']
+ return model_content, solver