fix: isolate MonitoringReporter

Author: fstagni

src/DIRAC/Core/DISET/private/Service.py

@@ -1,9 +1,9 @@
 """
-  Service class implements the server side part of the DISET protocol
-  There are 2 main parts in this class:
+Service class implements the server side part of the DISET protocol
+There are 2 main parts in this class:
 
-  - All useful functions for initialization
-  - All useful functions to handle the requests
+- All useful functions for initialization
+- All useful functions to handle the requests
 """
 # pylint: skip-file
 # __searchInitFunctions gives RuntimeError: maximum recursion depth exceeded
@@ -102,17 +102,10 @@ def initialize(self):
         }
         self.securityLogging = Operations().getValue("EnableSecurityLogging", False)
 
-        # Initialize Monitoring
-        # The import needs to be here because of the CS must be initialized before importing
-        # this class (see https://github.com/DIRACGrid/DIRAC/issues/4793)
-        from DIRAC.MonitoringSystem.Client.MonitoringReporter import MonitoringReporter
-
-        self.activityMonitoringReporter = MonitoringReporter(monitoringType="ServiceMonitoring")
-
         # Call static initialization function
         try:
             self._handler["class"]._rh__initializeClass(
-                dict(self._serviceInfoDict), self._lockManager, self._msgBroker, self.activityMonitoringReporter
+                dict(self._serviceInfoDict), self._lockManager, self._msgBroker, None
             )
             if self._handler["init"]:
                 for initFunc in self._handler["init"]:
@@ -563,6 +556,9 @@ def _executeAction(self, trid, proposalTuple, handlerObj):
                         retStatus = "OK"
                     else:
                         retStatus = "ERROR"
+                from DIRAC.MonitoringSystem.Client.MonitoringReporter import MonitoringReporter
+
+                self.activityMonitoringReporter = MonitoringReporter(monitoringType="ServiceMonitoring")
                 self.activityMonitoringReporter.addRecord(
                     {
                         "timestamp": int(TimeUtilities.toEpochMilliSeconds()),
@@ -592,6 +588,9 @@ def _mbReceivedMsg(self, trid, msgObj):
         handlerObj = result["Value"]
         response = handlerObj._rh_executeMessageCallback(msgObj)
         if self.activityMonitoring and response["OK"]:
+            from DIRAC.MonitoringSystem.Client.MonitoringReporter import MonitoringReporter
+
+            self.activityMonitoringReporter = MonitoringReporter(monitoringType="ServiceMonitoring")
             self.activityMonitoringReporter.addRecord(
                 {
                     "timestamp": int(TimeUtilities.toEpochMilliSeconds()),