TransactionalFlow and TransactionalSink support #86
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IgorFedchenko
commented
Oct 30, 2019
| /* scala code: | ||
| producer.sendOffsetsToTransaction(offsetMap.asJava, group) | ||
| producer.commitTransaction() | ||
| */ |
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Here is an example of missing lines, that should be replaced to close #85 . Few more places like this in methods below.
IgorFedchenko
commented
Oct 30, 2019
| /// emits a <see cref="TransactionalMessage{K,V}"/>. The flow requires a unique `transactional.id` across all app | ||
| /// instances. The flow will override producer properties to enable Kafka exactly-once transactional support. | ||
| /// </summary> | ||
| [InternalApi] |
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Marked this as InternalApi to avoid public usage, because it is not working due to #85. And same for TransactionalSink method below.
|
@IgorFedchenko more conflicts here |
|
Oh yea, lots of them... Resolved now. |
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As a part of issue #36, transactional producer methods are implemented.
They should work in pair with
KafkaConsumer.TransactionalSourcefor exactly once delivery guarantee.Unfortunately, due to Confluent's driver issue there are missing few important lines in implementation (they are marked with
TODOlabels). Without them, implementation does not work correctly and tests fail.With that said, the implementation by itself is finished, and once the transactional support in Confluent driver will be finished we can quickly adopt it. I created issue for that: #85
For now, I am skipping failing test to let CI checks pass.
P.S. This PR is based on #83 and #84 PRs, so better to merge them first.