Apache Flink - Evictor interface clarification

[M Singh]

Hi:

I am looking at the documentation and it states:

'The evictor has the ability to remove elements from a window after the trigger fires and before and/or after the window function is applied. '

I understand that if we use evictor's before method (evictBefore) it can remove items before invocation of the window computation.  But I am not sure what is the use of the evictor's after method (evictAfter) ?  

Please let me know where I can find information about what are the use cases for evictor's after method (evictorAfter).

Thanks

Mans

[vishnuviswanath]

Hi Mans,

Have a look at this: http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-Enhance-Window-Evictor-in-Flink-tp12406p12442.html

Thanks,

Vishnu

On Sat, Nov 18, 2017 at 11:28 AM, M Singh <[hidden email]> wrote:

Hi:

I am looking at the documentation and it states:

'The evictor has the ability to remove elements from a window after the trigger fires and before and/or after the window function is applied. '

I understand that if we use evictor's before method (evictBefore) it can remove items before invocation of the window computation.  But I am not sure what is the use of the evictor's after method (evictAfter) ?  

Please let me know where I can find information about what are the use cases for evictor's after method (evictorAfter).

Thanks

Mans

[M Singh]

Thanks Vishu for the pointer.

On Saturday, November 18, 2017 6:27 PM, Vishnu Viswanath <[hidden email]> wrote:

Hi Mans,

Have a look at this: http://apache-flink- mailing-list-archive.1008284. n3.nabble.com/DISCUSS-Enhance- Window-Evictor-in-Flink- tp12406p12442.html

Thanks,

Vishnu

On Sat, Nov 18, 2017 at 11:28 AM, M Singh <[hidden email]> wrote:

Hi:

I am looking at the documentation and it states:

'The evictor has the ability to remove elements from a window after the trigger fires and before and/or after the window function is applied. '

I understand that if we use evictor's before method (evictBefore) it can remove items before invocation of the window computation.  But I am not sure what is the use of the evictor's after method (evictAfter) ?  

Please let me know where I can find information about what are the use cases for evictor's after method (evictorAfter).

Thanks

Mans