Thanks Fabian. Your suggestion helped. But, I am stuck at 3rd step 1. I didn't completely understand the step 3. What the process function should look like ? Why does it needs to be stateful. Can you please provide more details on this. 2. In the stateful, function, we need to have a value state ? what details we need to store would be helpful to implement the use case. 3. Moreover, I see that RichProcessFunction is deprecated. What else can we use in place of RichProcessFunction ?
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