Add bi-directional GRPC python executor.

Python based bidirectional communication script executor microservice.

Issue-ID: CCSDK-1747
Signed-off-by: Brinda Santh <bs2796@att.com>
Change-Id: If2e8f862ca4cb97d10714df2ab1cccccef2d576a

1 files changed, 73 insertions, 0 deletions

diff --git a/ms/py-executor/server.py b/ms/py-executor/server.py
new file mode 100644
index 000000000..5c149d96b
--- /dev/null
+++ b/ms/py-executor/server.py
@@ -0,0 +1,73 @@
+#!/usr/bin/python
+#
+#  Copyright (C) 2019 Bell Canada.
+#  Modifications Copyright © 2018-2019 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 builtins import KeyboardInterrupt
+from concurrent import futures
+import logging
+import time
+import grpc
+from pathlib import Path, PurePath
+from blueprints_grpc import BluePrintProcessing_pb2_grpc
+from blueprints_grpc.request_header_validator_interceptor import RequestHeaderValidatorInterceptor
+from blueprints_grpc.blueprint_processing_server import BluePrintProcessingServer
+from blueprints_grpc import ScriptExecutorConfiguration
+
+logger = logging.getLogger("Server")
+
+_ONE_DAY_IN_SECONDS = 60 * 60 * 24
+
+
+def serve(configuration: ScriptExecutorConfiguration):
+    port = configuration.script_executor_property('port')
+    basic_auth = configuration.script_executor_property('auth')
+    maxWorkers = configuration.script_executor_property('maxWorkers')
+
+    header_validator = RequestHeaderValidatorInterceptor(
+        'authorization', basic_auth, grpc.StatusCode.UNAUTHENTICATED,
+        'Access denied!')
+
+    server = grpc.server(futures.ThreadPoolExecutor(max_workers=int(maxWorkers)),
+                         interceptors=(header_validator,))
+
+    BluePrintProcessing_pb2_grpc.add_BluePrintProcessingServiceServicer_to_server(
+        BluePrintProcessingServer(configuration), server)
+
+    server.add_insecure_port('[::]:' + port)
+    server.start()
+
+    logger.info("Command Executor Server started on %s" % port)
+
+    try:
+        while True:
+            time.sleep(_ONE_DAY_IN_SECONDS)
+    except KeyboardInterrupt:
+        server.stop(0)
+
+
+if __name__ == '__main__':
+    config_file = str(PurePath(Path().absolute())) + '/configuration.ini'
+    configuration = ScriptExecutorConfiguration(config_file)
+    logging_formater = '%(asctime)s - %(name)s - %(threadName)s - %(levelname)s - %(message)s'
+    logging.basicConfig(filename=configuration.script_executor_property('logFile'),
+                        level=logging.DEBUG,
+                        format=logging_formater)
+    console = logging.StreamHandler()
+    console.setLevel(logging.INFO)
+    formatter = logging.Formatter(logging_formater)
+    console.setFormatter(formatter)
+    logging.getLogger('').addHandler(console)
+    serve(configuration)