[jira] [Comment Edited] (FLINK-3758) Add possibility to register accumulators in custom triggers

["Konstantin Knauf (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-3758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15250106#comment-15250106 ] 

Konstantin Knauf edited comment on FLINK-3758 at 4/20/16 3:42 PM:
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{quote}
In the Trigger we would not know when to call addAccumulator()
{quote}
That's what I thought, yes. {{getAccumulator(String name, Accumulator defaultAccumulator)}} sounds gut. I will have a look at it. 




was (Author: knaufk):
{quote}
In the Trigger we would not know when to call addAccumulator()
{quote}
That's what I thought, yes. {getAccumulator(String name, Accumulator defaultAccumulator)} sounds gut. I will have a look at it. 



> Add possibility to register accumulators in custom triggers
> -----------------------------------------------------------
>
>                 Key: FLINK-3758
>                 URL: https://issues.apache.org/jira/browse/FLINK-3758
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: Konstantin Knauf
>            Priority: Minor
>
> For monitoring purposes it would be nice to be able to to use accumulators in custom trigger functions. 
> Basically, the trigger context could just expose {{getAccumulator}} of {{RuntimeContext}} or does this create problems I am not aware of?
> Adding accumulators in a trigger function is more difficult, I think, but that's not really neccessary as the accummulator could just be added in some other upstream operator.



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