Kafka - Advanced Stream Processing
Which of the following is the correct way to add a persistent key-value state store named
myStore to a StreamsBuilder in Kafka Streams?Which of the following is the correct way to add a persistent key-value state store named myStore to a StreamsBuilder in Kafka Streams?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall correct syntax for adding state store and check options
The correct method usesaddStateStorewith a store builder fromStores.keyValueStoreBuilderandStores.persistentKeyValueStore. Only builder.addStateStore(Stores.keyValueStoreBuilder(Stores.persistentKeyValueStore("myStore"), Serdes.String(), Serdes.String())) matches the correct method signature and usage.Final Answer:
builder.addStateStore(Stores.keyValueStoreBuilder(Stores.persistentKeyValueStore("myStore"), Serdes.String(), Serdes.String())) -> Option AQuick Check:
Use addStateStore with keyValueStoreBuilder [OK]
Quick Trick: Use addStateStore with keyValueStoreBuilder [OK]
Common Mistakes:
- Using incorrect method names like addStore or createStateStore
- Missing Serdes parameters for key and value
- Confusing persistent and in-memory store creation
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