async def _get_latest_version_by_key(self, request):
key = request.key
namespace = request.namespace
timeout_seconds = request.timeout_seconds
if 0 == timeout_seconds:
latest_version = self._query_latest_version_by_key(key, namespace)
return notification_service_pb2.GetLatestVersionResponse(
return_code=str(notification_service_pb2.ReturnStatus.SUCCESS),
return_msg='',
version=latest_version)
else:
start = time.time()
latest_version = self._query_latest_version_by_key(key, namespace)
async with self.write_condition:
while time.time(
) - start < timeout_seconds and latest_version == 0:
try:
await asyncio.wait_for(
self.write_condition.wait(),
timeout_seconds - time.time() + start)
latest_version = self._query_latest_version_by_key(
key, namespace)
except asyncio.TimeoutError:
pass
return notification_service_pb2.ListEventsResponse(
return_code=str(notification_service_pb2.ReturnStatus.SUCCESS),
return_msg='',
version=latest_version)
def getLatestVersionByKey(self, request, context):
try:
return self._get_latest_version_by_key(request)
except Exception as e:
return notification_service_pb2.GetLatestVersionResponse(
return_code=str(notification_service_pb2.ReturnStatus.ERROR),
return_msg=str(e))