[jira] [Resolved] (REEF-1642) Check for singletons per REEFEnvironment, not per entire JVM process

["Markus Weimer (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/REEF-1642?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Markus Weimer resolved REEF-1642.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 0.16

Resolved via [#1157|https://github.com/apache/reef/pull/1157]

> Check for singletons per REEFEnvironment, not per entire JVM process
> --------------------------------------------------------------------
>
>                 Key: REEF-1642
>                 URL: https://issues.apache.org/jira/browse/REEF-1642
>             Project: REEF
>          Issue Type: Sub-task
>          Components: REEF
>            Reporter: Sergiy Matusevych
>            Assignee: Sergiy Matusevych
>              Labels: assertion, singleton
>             Fix For: 0.16
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> Currently some classes, like {{Evaluators}}, assert that there is only one instance of such class per application. This is no longer true with the {{REEFEnvironment}} setting, where a class is a singleton per environment, not per entire JVM process. We need to extend our assertion functionality for such case, and use it in classes like {{Evaluators}}



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