Luke Chen created KAFKA-14752:
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Summary: improve kafka examples under examples package
Key: KAFKA-14752
URL: https://issues.apache.org/jira/browse/KAFKA-14752
Project: Kafka
Issue Type: Improvement
Reporter: Luke Chen
Kafka provided some examples under "examples" package. Currently we provided
* java-producer-consumer-demo, which is to produce 10000 records and then
consume all of them
* exactly-once-demo, which is to produce records -> consume -> process ->
consume.
Among them, the base component is producer and consumer. However, I found the
producer and consumer example is not in a good form. For example:
# Both consumer and producer doesn't gracefully close the resource after
completed
# The example doesn't provide a good example to handle different kind of
exceptions. It's just a happy path example
# No clear comment to instruct users why we should do this, and what it is
doing for each operation.
Furthermore, while running both the examples, I saw flood of logs output
because we print one line for message sent, and one line for message received.
In java-producer-consumer-demo, there will be 10000 records sent/received, so >
20000 lines of logs output. Same for exactly-once-demo. Maybe we should
consider to reduce the record number.
One more thing, in exactly-once-demo.java, there are clear class java doc in
the demo file, but there's nothing in java-producer-consumer-demo.java. We
should also improve that.
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