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

["Sergiy Matusevych (JIRA)" <ji...@apache.org>]

Sergiy Matusevych created REEF-1642:
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             Summary: 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


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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