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From "Tushar Gosavi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (APEXCORE-577) Plugin support to inspect DAG before launch.
Date Mon, 24 Apr 2017 18:45:04 GMT

     [ https://issues.apache.org/jira/browse/APEXCORE-577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tushar Gosavi updated APEXCORE-577:
-----------------------------------
    Summary: Plugin support to inspect DAG before launch.  (was: Visitor API for DAG)

> Plugin support to inspect DAG before launch.
> --------------------------------------------
>
>                 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
>             Fix For: 3.6.0
>
>
> 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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