From 292df45380d0b9a6baeb2166e5464ee32f0f2037 Mon Sep 17 00:00:00 2001
From: Waleed Akbar <wakbar@cttc.es>
Date: Wed, 24 Apr 2024 16:22:46 +0000
Subject: [PATCH] Initial "Telemetry Frontend" client code
---
.../client/TelemetryFrontendClient.py | 70 +++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 src/telemetry_frontend/client/TelemetryFrontendClient.py
diff --git a/src/telemetry_frontend/client/TelemetryFrontendClient.py b/src/telemetry_frontend/client/TelemetryFrontendClient.py
new file mode 100644
index 000000000..9ca19bb8c
--- /dev/null
+++ b/src/telemetry_frontend/client/TelemetryFrontendClient.py
@@ -0,0 +1,70 @@
+# Copyright 2022-2023 ETSI TeraFlowSDN - TFS OSG (https://tfs.etsi.org/)
+#
+# 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 grpc, logging
+from common.Constants import ServiceNameEnum
+from common.Settings import get_service_host, get_service_port_grpc
+
+from common.proto.context_pb2 import Empty
+from common.tools.grpc.Tools import grpc_message_to_json_string
+from common.tools.client.RetryDecorator import retry, delay_exponential
+from common.proto.telemetry_frontend_pb2_grpc import TelemetryFrontendServiceStub
+from comment.proto.telemetry_frontend_pb2 import Collector, CollectorId, CollectorFilter, CollectorList
+
+LOGGER = logging.getLogger(__name__)
+MAX_RETRIES = 10
+DELAY_FUNCTION = delay_exponential(initial=0.01, increment=2.0, maximum=5.0)
+RETRY_DECORATOR = retry(max_retries=MAX_RETRIES, delay_function=DELAY_FUNCTION, prepare_method_name='connect')
+
+class TelemetryFrontendClient:
+ def __init__(self, host=None, port=None):
+ if not host: host = get_service_host(ServiceNameEnum.TELEMETRYFRONTEND)
+ if not port: port = get_service_port_grpc(ServiceNameEnum.TELEMETRYFRONTEND)
+ self.endpoint = '{:s}:{:s}'.format(str(host), str(port))
+ LOGGER.debug('Creating channel to {:s}...'.format(str(self.endpoint)))
+ self.channel = None
+ self.stub = None
+ self.connect()
+ LOGGER.debug('Channel created')
+
+ def connect(self):
+ self.channel = grpc.insecure_channel(self.endpoint)
+ self.stub = TelemetryFrontendServiceStub(self.channel)
+
+ def close(self):
+ if self.channel is not None: self.channel.close()
+ self.channel = None
+ self.stub = None
+
+ @RETRY_DECORATOR
+ def StartCollector(self, request : Collector) --> CollectorId:
+ LOGGER.debug('StartCollector: {:s}'.format(grpc_message_to_json_string(request)))
+ response = self.stub.StartCollector(request)
+ LOGGER.debug('StartCollector result: {:s}'.format(grpc_message_to_json_string(response)))
+ return response
+
+ @RETRY_DECORATOR
+ def StopCollector(self, request : CollectorId) --> Empty:
+ LOGGER.debug('StopCollector: {:s}'.format(grpc_message_to_json_string(request)))
+ response = self.stub.StopCollector(request)
+ LOGGER.debug('StopCollector result: {:s}'.format(grpc_message_to_json_string(response)))
+ return response
+
+ @RETRY_DECORATOR
+ def SelectCollectors(self, request : CollectorFilter) --> CollectorList:
+ LOGGER.debug('SelectCollectors: {:s}'.format(grpc_message_to_json_string(request)))
+ response = self.stub.SelectCollectors(request)
+ LOGGER.debug('SelectCollectors result: {:s}'.format(grpc_message_to_json_string(response)))
+ return response
+
--
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