fix: use try/except to create session if get_session raises in ADK 1.x

agents/core-logic/app.py

@@ -52,6 +52,28 @@ class RunResponse(BaseModel):
     response: str
 
 
+def _ensure_session(user_id: str, session_id: str):
+    """Get existing session or create a new one. Handles both ADK 1.x and 2.x."""
+    try:
+        session = session_service.get_session(
+            app_name=APP_NAME,
+            user_id=user_id,
+            session_id=session_id,
+        )
+        if session is not None:
+            return session
+    except Exception:
+        pass  # session doesn't exist — fall through to create
+
+    session = session_service.create_session(
+        app_name=APP_NAME,
+        user_id=user_id,
+        session_id=session_id,
+    )
+    logger.info(f"Created new session: {session_id} for user: {user_id}")
+    return session
+
+
 @app.get("/health")
 async def health():
     return JSONResponse({"status": "ok", "service": APP_NAME})
@@ -60,19 +82,7 @@ async def health():
 @app.post("/run", response_model=RunResponse)
 async def run(req: RunRequest):
     try:
-        # Always ensure session exists — create if missing
+        _ensure_session(req.user_id, req.session_id)
-        session = session_service.get_session(
-            app_name=APP_NAME,
-            user_id=req.user_id,
-            session_id=req.session_id,
-        )
-        if session is None:
-            session = session_service.create_session(
-                app_name=APP_NAME,
-                user_id=req.user_id,
-                session_id=req.session_id,
-            )
-            logger.info(f"Created new session: {req.session_id}")
 
         runner = Runner(
             agent=root_agent,
@@ -96,9 +106,7 @@ async def run(req: RunRequest):
                     if part.text:
                         final_response += part.text
 
-        logger.info(
+        logger.info(f"[{req.user_id}/{req.session_id}] Response length: {len(final_response)}")
-            f"[{req.user_id}/{req.session_id}] Response length: {len(final_response)}"
-        )
         return RunResponse(
             user_id=req.user_id,
             session_id=req.session_id,