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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXCORE-577) Visitor API for DAG
Date Fri, 27 Jan 2017 06:11:25 GMT

    [ https://issues.apache.org/jira/browse/APEXCORE-577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15842309#comment-15842309

ASF GitHub Bot commented on APEXCORE-577:

GitHub user tushargosavi opened a pull request:


    APEXCORE-577 Add visitor API to examine the DAG.


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/tushargosavi/apex-core APEXCORE-577

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #456
commit 0da3a472c0bea14b49239e8e267042fdc513056e
Author: Tushar R. Gosavi <tushar@apache.org>
Date:   2016-12-22T09:06:06Z

    APEXCORE-577 Add visitor API to examine the DAG.


> Visitor API for DAG
> -------------------
>                 Key: APEXCORE-577
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-577
>             Project: Apache Apex Core
>          Issue Type: Sub-task
>            Reporter: Tushar Gosavi
>            Assignee: Tushar Gosavi
> Support an Visitor like api for DAG, which could be used to write plugins for Apex.
> change DAG interface to add a visitor
> {code}
> registerVisitor(DagVisitor visitor)
> {code}
> The DagVisitor interface
> {code}
> interface DagVisitor {
>   boolean startDAG(DAG* dag);
>   boolean visitOperator(OperatorMeta *ometa)
>   boolean visitStream(StreamMeta *smeta);
>   boolean endDAG()
> }
> {code}
> dev thread discussions
> https://lists.apache.org/thread.html/1c37e0954cee029c9de537cc35ecb35beebdf49aba17de89bd2ce9ed@%3Cdev.apex.apache.org%3E

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