[jira] [Resolved] (SAMZA-2516) Migrate BaseKeyValueStorageEngineFactory to be an abstract class instead of trait

["Cameron Lee (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SAMZA-2516?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Cameron Lee resolved SAMZA-2516.
--------------------------------
    Resolution: Fixed

> Migrate BaseKeyValueStorageEngineFactory to be an abstract class instead of trait
> ---------------------------------------------------------------------------------
>
>                 Key: SAMZA-2516
>                 URL: https://issues.apache.org/jira/browse/SAMZA-2516
>             Project: Samza
>          Issue Type: Improvement
>            Reporter: Cameron Lee
>            Assignee: Cameron Lee
>            Priority: Major
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> If using Scala 2.11, there is a compile error when trying to use a Java class extend a Scala trait with implemented methods. BaseKeyValueStorageEngineFactory can be considered part of the Samza API, but it is a Scala trait with an implemented method, so that makes extension a bit restrictive.
> I think the Java extension works in Scala 2.12, but we are still supporting both 2.11 and 2.12.
> Also, it would be good to migrate away from Scala code in general, for consistency with other new Samza code.



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