Ping workbench with background task only (#258)

To allow ctrl+c during startup

Author: markwaddle

libraries/python/semantic-workbench-assistant/semantic_workbench_assistant/assistant_service.py

@@ -74,26 +74,14 @@ def __init__(
 
         @asynccontextmanager
         async def lifespan() -> AsyncIterator[None]:
-            # connect to workbench on startup
             logger.info(
-                "connecting to semantic-workbench-service on startup; workbench_service_url: %s, assistant_service_id: %s, callback_url: %s",
+                "connecting to semantic-workbench-service; workbench_service_url: %s, assistant_service_id: %s, callback_url: %s",
                 settings.workbench_service_url,
                 self.service_id,
                 settings.callback_url,
             )
 
             async with self.workbench_client.for_service() as service_client:
-                try:
-                    await self._ping_semantic_workbench(service_client)
-                    logger.info(
-                        "connected to semantic-workbench-service on startup; workbench_service_url: %s, assistant_service_id: %s, callback_url: %s",
-                        settings.workbench_service_url,
-                        self.service_id,
-                        settings.callback_url,
-                    )
-                except httpx.HTTPError:
-                    logger.warning("failed to connect workbench on startup", exc_info=True)
-
                 # start periodic pings to workbench
                 ping_task = asyncio.create_task(
                     self._periodically_ping_semantic_workbench(service_client), name="ping-workbench"
@@ -116,16 +104,16 @@ async def _periodically_ping_semantic_workbench(
     ) -> NoReturn:
         while True:
             try:
-                jitter = random.uniform(0, settings.workbench_service_ping_interval_seconds / 2.0)
-                await asyncio.sleep(settings.workbench_service_ping_interval_seconds + jitter)
-
                 try:
                     await self._ping_semantic_workbench(client)
                 except httpx.HTTPError:
-                    logger.error("ping to workbench failed", exc_info=True)
+                    logger.exception("ping to workbench failed")
+
+                jitter = random.uniform(0, settings.workbench_service_ping_interval_seconds / 2.0)
+                await asyncio.sleep(settings.workbench_service_ping_interval_seconds + jitter)
 
             except Exception:
-                logger.exception("unexpected error in ping loop", exc_info=True)
+                logger.exception("unexpected error in ping loop")
 
     @backoff.on_exception(
         backoff.expo,