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Posted to commits@samza.apache.org by "Cameron Lee (JIRA)" <ji...@apache.org> on 2018/05/09 20:24:00 UTC

[jira] [Created] (SAMZA-1709) Use lazy creation for SystemAdmins in ApplicationRunners

Cameron Lee created SAMZA-1709:
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             Summary: Use lazy creation for SystemAdmins in ApplicationRunners
                 Key: SAMZA-1709
                 URL: https://issues.apache.org/jira/browse/SAMZA-1709
             Project: Samza
          Issue Type: Improvement
            Reporter: Cameron Lee
            Assignee: Cameron Lee


An instance of SystemAdmins is created when instantiating any AbstractApplicationRunner, but the SystemAdmins is only actually needed for some of the methods for some of the runners. For example, LocalApplicationRunner.kill does not need SystemAdmins, and LocalContainerRunner does not need SystemAdmins for anything.

Doing lazy instantiation allows us to more easily manage the SystemAdmins lifecycle, since it removes the need to add lifecycle hooks for the ApplicationRunner.



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