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https://issues.apache.org/jira/browse/SAMZA-791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14948612#comment-14948612
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Aleksandar Bircakovic commented on SAMZA-791:
---------------------------------------------
RB: https://reviews.apache.org/r/39130/
> KafkaSystemFactory narrows return types
> ---------------------------------------
>
> Key: SAMZA-791
> URL: https://issues.apache.org/jira/browse/SAMZA-791
> Project: Samza
> Issue Type: Bug
> Components: kafka
> Reporter: Ryanne Dolan
> Assignee: Aleksandar Bircakovic
> Priority: Trivial
>
> I KafkaSystemFactory, the return types of each method are narrowed from the
> SystemFactory interface:
> SystemProducer -> KafkaSystemProducer
> SystemConsumer -> KafkaSystemConsumer
> SystemAdmin -> KafkaSystemAdmin
> This makes it unnecessarily difficult to sub-class KafkaSystemFactory.
> The fix: specify return types when defining these methods, e.g.
> def getProducer(systemName: String, config: Config, registry:
> MetricsRegistry) = ...
> should be:
> def getProducer(systemName: String, config: Config, registry:
> MetricsRegistry): *SystemProducer* = ...
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