Merge "Adding the generic solver code"

1 files changed, 92 insertions, 0 deletions

diff --git a/runtime/solvers/py/py_solver.py b/runtime/solvers/py/py_solver.py
new file mode 100644
index 0000000..6b200ab
--- /dev/null
+++ b/runtime/solvers/py/py_solver.py
@@ -0,0 +1,92 @@
+# -------------------------------------------------------------------------
+#   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)