chore: Do not send api request when session does not have events

PiperOrigin-RevId: 775423356

Author: DeanChensj

src/google/adk/memory/vertex_ai_memory_bank_service.py

@@ -78,12 +78,15 @@ async def add_session_to_memory(self, session: Session):
  },
  }
 
- api_response = await api_client.async_request(
- http_method='POST',
- path=f'reasoningEngines/{self._agent_engine_id}/memories:generate',
- request_dict=request_dict,
- )
- logger.info(f'Generate memory response: {api_response}')
+ if events:
+ api_response = await api_client.async_request(
+ http_method='POST',
+ path=f'reasoningEngines/{self._agent_engine_id}/memories:generate',
+ request_dict=request_dict,
+ )
+ logger.info(f'Generate memory response: {api_response}')
+ else:
+ logger.info('No events to add to memory.')
 
  @override
  async def search_memory(self, *, app_name: str, user_id: str, query: str):

tests/unittests/memory/test_vertex_ai_memory_bank_service.py

@@ -48,6 +48,13 @@
  ],
 )
 
+MOCK_SESSION_WITH_EMPTY_EVENTS = Session(
+ app_name=MOCK_APP_NAME,
+ user_id=MOCK_USER_ID,
+ id='444',
+ last_update_time=22333,
+)
+
 
 RETRIEVE_MEMORIES_REGEX = r'^reasoningEngines/([^/]+)/memories:retrieve$'
 GENERATE_MEMORIES_REGEX = r'^reasoningEngines/([^/]+)/memories:generate$'
@@ -136,6 +143,15 @@ async def test_add_session_to_memory(mock_get_api_client):
  )
 
 
+@pytest.mark.asyncio
+@pytest.mark.usefixtures('mock_get_api_client')
+async def test_add_empty_session_to_memory(mock_get_api_client):
+ memory_service = mock_vertex_ai_memory_bank_service()
+ await memory_service.add_session_to_memory(MOCK_SESSION_WITH_EMPTY_EVENTS)
+
+ mock_get_api_client.async_request.assert_not_called()
+
+
 @pytest.mark.asyncio
 @pytest.mark.usefixtures('mock_get_api_client')
 async def test_search_memory(mock_get_api_client):