Matthias J. Sax created KAFKA-4436:
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Summary: Provide builder pattern for StreamsConfig
Key: KAFKA-4436
URL: https://issues.apache.org/jira/browse/KAFKA-4436
Project: Kafka
Issue Type: Improvement
Components: streams
Reporter: Matthias J. Sax
Priority: Minor
Currently, {{StreamsConfig}} parameters must be set "manually" as key value
pairs. This has multiple disadvantages from a user point of view:
- mandatory arguments could be missing
- data types might be wrong
- producer/consumer config parameters could conflict as they might have the
same name (user needs to know to prefix them to avoid conflict)
Those problems have different impact: either a runtime exception is thrown if
the problem is detected (e.g. missing parameter or wrong type) or the
application is just not configured correctly (producer/consumer has wrong
config).
A builder pattern would avoid those problems by forcing the user in the first
place to specify thing correctly (otherwise, it won't compile). For example
something like this:
{noformat}
StreamsConfig config = StreamsConfig.builder()
.setApplicationId(String appId)
.addBootstrapServer(String host, int port)
.addBootstrapServer(String host, int port)
.addZookeeper(String host, int port)
.addZookeeper(String host, int port)
.setStateDirectory(File path)
.setConsumerConfig(
ConsumerConfig.builder()
.setAutoOffsetReset(...)
.build()
)
.build();
{noformat}
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