Fix: More accurate perf metrics for slow-starting streams (#385)

Author: aaronsteers

airbyte/progress.py

@@ -36,7 +36,6 @@
 from airbyte_protocol.models import (
     AirbyteMessage,
     AirbyteStreamStatus,
-    Type,
 )
 
 from airbyte import logs
@@ -275,16 +274,17 @@ def tally_records_read(
                     self.stream_read_counts[message.record.stream] += 1
 
                     if message.record.stream not in self.stream_read_start_times:
-                        self._log_stream_read_start(stream_name=message.record.stream)
+                        self.log_stream_start(stream_name=message.record.stream)
 
-            elif (
-                message.trace
-                and message.trace.stream_status
-                and message.trace.stream_status.status is AirbyteStreamStatus.COMPLETE
-            ):
-                self._log_stream_read_end(
-                    stream_name=message.trace.stream_status.stream_descriptor.name
-                )
+            elif message.trace and message.trace.stream_status:
+                if message.trace.stream_status.status is AirbyteStreamStatus.STARTED:
+                    self.log_stream_start(
+                        stream_name=message.trace.stream_status.stream_descriptor.name
+                    )
+                if message.trace.stream_status.status is AirbyteStreamStatus.COMPLETE:
+                    self._log_stream_read_end(
+                        stream_name=message.trace.stream_status.stream_descriptor.name
+                    )
 
             # Bail if we're not due for a progress update.
             if count % update_period != 0:
@@ -345,12 +345,12 @@ def tally_confirmed_writes(
         """
         self._start_rich_view()  # Start Rich's live view if not already running.
         for message in messages:
-            if message.type is Type.STATE:
+            if message.state:
                 # This is a state message from the destination. Tally the records written.
                 if message.state.stream and message.state.destinationStats:
                     stream_name = message.state.stream.stream_descriptor.name
-                    self.destination_stream_records_confirmed[stream_name] += (
-                        message.state.destinationStats.recordCount
+                    self.destination_stream_records_confirmed[stream_name] += int(
+                        message.state.destinationStats.recordCount or 0
                     )
                 self._update_display()
 
@@ -418,11 +418,14 @@ def _log_sync_start(self) -> None:
             event_type=EventType.SYNC,
         )
 
-    def _log_stream_read_start(self, stream_name: str) -> None:
-        self._print_info_message(
-            f"Read started on stream `{stream_name}` at `{pendulum.now().format('HH:mm:ss')}`..."
-        )
-        self.stream_read_start_times[stream_name] = time.time()
+    def log_stream_start(self, stream_name: str) -> None:
+        """Log that a stream has started reading."""
+        if stream_name not in self.stream_read_start_times:
+            self._print_info_message(
+                f"Read started on stream `{stream_name}` at "
+                f"`{pendulum.now().format('HH:mm:ss')}`..."
+            )
+            self.stream_read_start_times[stream_name] = time.time()
 
     def _log_stream_read_end(self, stream_name: str) -> None:
         self._print_info_message(