Kafka - Advanced Stream Processing
You need to create a live dashboard displaying the total number of transactions per account using Kafka Streams interactive queries. Which design approach is most suitable?
You need to create a live dashboard displaying the total number of transactions per account using Kafka Streams interactive queries. Which design approach is most suitable?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Maintain counts in a state store
Kafka Streams can keep real-time counts per account in a local state store.Step 2: Expose counts via interactive queries
The dashboard can query this state store through REST endpoints backed by Kafka Streams interactive queries.Step 3: Avoid indirect or delayed methods
Writing counts to a topic or external DB adds latency and complexity.Final Answer:
Maintain a state store with counts per account and query it via REST endpoints -> Option BQuick Check:
Interactive queries enable direct state store access [OK]
Quick Trick: Use state stores with REST for real-time dashboards [OK]
Common Mistakes:
MISTAKES- Relying solely on topics for querying counts
- Using external DBs causing stale data
- Not maintaining state stores for aggregation
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