Kafka - Advanced Stream Processing
You want to trigger a punctuator every minute but only if the stream time has advanced. Which scheduling approach should you use?
You want to trigger a punctuator every minute but only if the stream time has advanced. Which scheduling approach should you use?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand requirement to trigger only if stream time advances
This means the punctuator should trigger based on event time, not system clock.Step 2: Choose correct PunctuationType and interval
Use PunctuationType.STREAM_TIME with Duration.ofMinutes(1) to trigger every minute of stream time advancement.Final Answer:
Schedule with Duration.ofMinutes(1) and PunctuationType.STREAM_TIME. -> Option AQuick Check:
Stream time triggers = PunctuationType.STREAM_TIME [OK]
Quick Trick: Use STREAM_TIME for event-time based triggers [OK]
Common Mistakes:
MISTAKES- Using WALL_CLOCK_TIME when stream time is needed
- Mixing seconds and minutes inconsistently
- Assuming WALL_CLOCK_TIME depends on stream time
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