Stateful Windowing Processor¶
Group unbounded events by event time while handling late data and recoverable state.
flowchart LR J[Junior: why windows] --> M[Middle: watermarks] --> S[Senior: late-state failures] --> P[Professional: scale and recovery]flowchart LR Events --> Keyed[Keyed state] --> Window --> Output Watermark --> Window| Level | Guide | You are done when | |---|---|---| | Junior | Definition and why | You can distinguish event time from processing time. | | Middle | How it works | You can assign windows and watermarks. | | Senior | Failures and mistakes | You can bound lateness and state. | | Professional | Best practices and scale | You can operate checkpointed keyed state. | Practice rule: Define how late is too late before choosing a watermark.