[
https://issues.apache.org/jira/browse/APEXCORE-577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15896754#comment-15896754
]
Tushar Gosavi commented on APEXCORE-577:
----------------------------------------
[~PramodSSImmaneni] Thanks for the comments. I am doing changes as suggested by
you. I am thinking on not supporting postValidateDAG as the plugin could change
the DAG attributes and make
the DAG invalid again. let me know your though about it.
> 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
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
