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https://issues.apache.org/jira/browse/SPARK-4960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14268886#comment-14268886
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Saisai Shao commented on SPARK-4960:
------------------------------------

Hi all,

I just update the doc according to TD's comment, would you mind taking a look 
at this, thanks a lot.

Here is the link:
https://docs.google.com/document/d/1-JfFkFlc5APstIcvCeqqv2t5np30ft5qaTIiNCGZfdI/edit?usp=sharing

> Interceptor pattern in receivers
> --------------------------------
>
>                 Key: SPARK-4960
>                 URL: https://issues.apache.org/jira/browse/SPARK-4960
>             Project: Spark
>          Issue Type: New Feature
>          Components: Streaming
>            Reporter: Tathagata Das
>
> Sometimes it is good to intercept a message received through a receiver and 
> modify / do something with the message before it is stored into Spark. This 
> is often referred to as the interceptor pattern. There should be general way 
> to specify an interceptor function that gets applied to all receivers. 



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