public functions defined at interface level

Signed-off-by: Sai Shree Pradhan <saishree.pradhan@databricks.com>

Author: saishreeeee

src/databricks/sql/telemetry/telemetry_client.py

@@ -102,6 +102,14 @@ class BaseTelemetryClient(ABC):
     It is used to define the interface for telemetry clients.
     """
 
+    @abstractmethod
+    def export_event(self, event):
+        pass
+
+    @abstractmethod
+    def flush(self):
+        pass
+
     @abstractmethod
     def export_initial_telemetry_log(self, driver_connection_params, user_agent):
         pass
@@ -128,6 +136,12 @@ def __new__(cls):
             cls._instance = super(NoopTelemetryClient, cls).__new__(cls)
         return cls._instance
 
+    def export_event(self, event):
+        pass
+
+    def flush(self):
+        pass
+
     def export_initial_telemetry_log(self, driver_connection_params, user_agent):
         pass
 
@@ -354,9 +368,8 @@ def _handle_unhandled_exception(cls, exc_type, exc_value, exc_traceback):
         logger.debug(
             "Flushing pending telemetry and waiting for thread pool completion..."
         )
-        for uuid, client in cls._clients.items():
-            if hasattr(client, "flush"):
-                client.flush()  # Submit any pending events
+        for client in cls._clients.items():
+            client.flush()  # Submit any pending events
 
         if cls._executor:
             try: