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From tushargosavi <...@git.apache.org>
Subject [GitHub] apex-core pull request #361: APEXCORE-496 make operator name available to St...
Date Wed, 10 Aug 2016 11:45:56 GMT
Github user tushargosavi commented on a diff in the pull request:

    --- Diff: api/src/main/java/com/datatorrent/api/StatsListener.java ---
    @@ -115,6 +115,28 @@
         List<OperatorResponse> getOperatorResponse();
    +  /**
    +   * An interface to the DAG. Stats listener can get information about
    +   * operator or other elements in the DAG through this interface. currerntly
    +   * we only provide method to extract the operator name based on the physical
    +   * id of the operator. In future more methods can be added.
    +   *
    +   */
    --- End diff --
    exposing all information may expose internal implementation of the DAG. we can only have
dependency on apex-api. Can you suggest which information can be provided to stat listener
without adding dependency on the apex-engine. I can think of following
    - name
    - number of partitions for self.
    - aggregated stats at logical operator level.
    This list could be expanded in future.
    This jira puts the required infrastructure without breaking backward compatibility.

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