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https://issues.apache.org/jira/browse/APEXCORE-580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Yan updated APEXCORE-580:
-------------------------------
    Summary: Interface for processing and emitting control tuples  (was: Add 
methods for processing and emitting control tuples)

> Interface for processing and emitting control tuples
> ----------------------------------------------------
>
>                 Key: APEXCORE-580
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-580
>             Project: Apache Apex Core
>          Issue Type: Sub-task
>            Reporter: David Yan
>
> DefaultOutputPort needs to have a emitControl method so that operator code 
> can call to emit a control tuple.
> DefaultInputPort needs to have a processControl method so that operator would 
> be able to act on the arrival of a control tuple.
> We need to design this so that the default behavior is to propagate control 
> tuples to all output ports, and it should allow the user tp easily change 
> that behavior. The user can selectively propagate control tuples to certain 
> output ports, or block the propagation altogether.



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