Druid Streaming Continuous Query

[Raghuram]

I'm trying to see if there's any streaming client query which for instance is similar to Apache Ignite - Continuous Queries, https://ignite.apache.org/docs/latest/key-value-api/continuous-queries. I have gone through the Druid SQL and native query via JSON but for establishing continuous updates, believe client need to have their own strategy either via WebSockets or long polling, etc.,. and no such functionalities exist within Druid ?