Code Improvements

Updates to the Dockerfile to correctly start the component
Improvements in the way of starting new connectors
Correction in the setup.py script

Change-Id: I69f6e4a45a3e0e044a0fb0b741d9776262949500

.hadolint.yaml

@@ -2,3 +2,4 @@ ignored:
   - DL3008
   - SC1091
   - DL3015
+  - DL3015

monitoring-data-persistor/Dockerfile

@@ -47,4 +47,5 @@ RUN pip install --no-cache-dir monitoring-data-persistor-$VERSION.tar.gz && \
     rm monitoring-data-persistor-$VERSION.tar.gz
 
 # Define the entry point command
-CMD ["/bin/bash", "-c", "source /home/monitoring-data-env/bin/activate && python3 -u /home/main/runtime/DataPersistor.py /home/resources/config.properties > $LOG_FILE 2>&1"]
+# CMD ["/bin/bash", "-c", "source /home/monitoring-data-env/bin/activate && python3 -u /home/main/runtime/DataPersistor.py /home/resources/config.properties > $LOG_FILE 2>&1"]
+CMD ["/usr/local/bin/start_dp","/home/resources/config.properties","> $LOG_FILE 2>&1"]

monitoring-data-persistor/src/main/runtime/Constants.py

@@ -1,4 +1,5 @@
 class Constants:
+    data_persistor_name = "data_persistor"
     application_name_prefix = "nebulous_"
     start_forecasting_prefix = "topic://eu.nebulouscloud.forecasting.start_forecasting."
     forecasting_method_name = "exponentialsmoothing"

monitoring-data-persistor/src/main/runtime/DataPersistor.py

@@ -6,8 +6,8 @@ from jproperties import Properties
 from influxdb_client import Point, WritePrecision
 
 import exn
-from Constants import Constants
-from InfluxDBConnector import InfluxDBConnector
+from main.runtime.Constants import Constants
+from main.runtime.InfluxDBConnector import InfluxDBConnector
 from exn import connector, core
 from exn.core.handler import Handler
 from exn.handler.connector_handler import ConnectorHandler
@@ -34,7 +34,13 @@ class ConsumerHandler(Handler):
             self.influx_connector.write_data(point,self.application_name)
 
 class GenericConsumerHandler(Handler):
+    connector_thread = None
+    initialized_connector = None
     application_consumer_handler_connectors = {} #dictionary in which keys are applications and values are the consumer handlers.
+
+    def GenericConsumerHandler(self):
+        if self.connector_thread is not None:
+            self.initialized_connector.stop()
     def on_message(self, key, address, body, context, **kwargs):
 
         if (str(address)).startswith(Constants.monitoring_prefix+Constants.metric_list_topic):
@@ -42,22 +48,24 @@ class GenericConsumerHandler(Handler):
             logging.info("New metrics list message for application "+application_name + " - registering new connector")
             if (application_name in self.application_consumer_handler_connectors.keys()  is not None):
                 self.application_consumer_handler_connectors[application_name].stop()
-            connector = exn.connector.EXN('data_persistor-'+application_name, handler=Bootstrap(),
-                                      consumers=[
+            self.initialized_connector = exn.connector.EXN(Constants.data_persistor_name + "-" + application_name, handler=Bootstrap(),
+                                                           consumers=[
                                           core.consumer.Consumer('monitoring', Constants.monitoring_broker_topic + '.realtime.>', application=application_name,topic=True, fqdn=True, handler=ConsumerHandler(application_name=application_name)),
                                       ],
-                                      url=Constants.broker_ip,
-                                      port=Constants.broker_port,
-                                      username=Constants.broker_username,
-                                      password=Constants.broker_password
-                                      )
+                                                           url=Constants.broker_ip,
+                                                           port=Constants.broker_port,
+                                                           username=Constants.broker_username,
+                                                           password=Constants.broker_password
+                                                           )
             #connector.start()
-            self.application_consumer_handler_connectors[application_name] = connector
+            self.application_consumer_handler_connectors[application_name] = self.initialized_connector
             logging.info(f"Application specific connector registered for application {application_name}")
-            thread = threading.Thread(target=connector.start,args=())
-            thread.start()
-            from time import sleep
-            sleep(10000)
+            self.initialized_connector.start()
+            logging.info(f"Application specific connector started for application {application_name}")
+        #If threading support is explicitly required, uncomment these lines
+            #connector_thread = threading.Thread(target=self.initialized_connector.start,args=())
+            #connector_thread.start()
+            #connector_thread.join()
 
 def update_properties(configuration_file_location):
     p = Properties()
@@ -72,22 +80,25 @@ def update_properties(configuration_file_location):
         Constants.organization_name,metadata = p["organization_name"]
         Constants.bucket_name,metadata = p["bucket_name"]
 
-if __name__ == "__main__":
+def main():
     Constants.configuration_file_location = sys.argv[1]
     update_properties(Constants.configuration_file_location)
     component_handler = Bootstrap()
 
-    connector = connector.EXN('slovid', handler=component_handler,
-                              consumers=[
-                                  core.consumer.Consumer('data_persistor_application', Constants.monitoring_broker_topic + '.>', topic=True, fqdn=True, handler=GenericConsumerHandler()),
+    connector_instance = connector.EXN(Constants.data_persistor_name, handler=component_handler,
+                                       consumers=[
+                                  core.consumer.Consumer('monitoring_data', Constants.monitoring_broker_topic + '.>', topic=True, fqdn=True, handler=GenericConsumerHandler()),
                               ],
-                              url=Constants.broker_ip,
-                              port=Constants.broker_port,
-                              username=Constants.broker_username,
-                              password=Constants.broker_password
-                              )
+                                       url=Constants.broker_ip,
+                                       port=Constants.broker_port,
+                                       username=Constants.broker_username,
+                                       password=Constants.broker_password
+                                       )
     #connector.start()
-    thread = threading.Thread(target=connector.start,args=())
+    thread = threading.Thread(target=connector_instance.start,args=())
     thread.start()
 
-    print("Waiting for messages at the metric list topic, in order to start receiving applications")
+    print("Waiting for messages at the metric list topic, in order to start receiving applications")
+
+if __name__ == "__main__":
+    main()

monitoring-data-persistor/src/main/runtime/InfluxDBConnector.py

@@ -2,7 +2,7 @@ import json,logging
 
 import requests
 from influxdb_client import InfluxDBClient, Point, WritePrecision
-from Constants import Constants
+from main.runtime.Constants import Constants
 from influxdb_client.client.write_api import SYNCHRONOUS
 
 def create_influxdb_bucket(application_name):

monitoring-data-persistor/src/setup.py

@@ -9,7 +9,7 @@ setup(
 package_dir={'': '.'},
     entry_points={
         'console_scripts': [
-            'start_dp = main.runtime:DataPersistor',
+            'start_dp = main.runtime.DataPersistor:main',
         ],
     }
     # other setup configurations