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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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Tushar Gosavi closed APEXCORE-580.
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Closing after 3.6.0 release
> 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
> Assignee: Bhupesh Chawda
> Fix For: 3.6.0
>
>
> 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.
> Similar to a regular data tuple, we also need to provide a way for the user
> to provide custom serialization for the 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 to easily change
> that behavior. The user can selectively propagate control tuples to certain
> output ports, or block the propagation altogether.
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