[jira] [Commented] (FLINK-1819) Allow access to RuntimeContext from Input and OutputFormats

["Stephan Ewen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-1819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14485163#comment-14485163 ] 

Stephan Ewen commented on FLINK-1819:
-------------------------------------

I agree, that would be a very good addition.

Since Input/Output formats are interfaces, what is the best place to hand over the runtime context?

Ideas:
  - Pass it to the {{open()}} method as an additional argument (API breaking)
  - make formats implement a special interface {{ContextAware}} that defines a {{setRuntimeContext()}} method. 

> Allow access to RuntimeContext from Input and OutputFormats
> -----------------------------------------------------------
>
>                 Key: FLINK-1819
>                 URL: https://issues.apache.org/jira/browse/FLINK-1819
>             Project: Flink
>          Issue Type: Improvement
>          Components: Local Runtime
>    Affects Versions: 0.9, 0.8.1
>            Reporter: Fabian Hueske
>            Priority: Minor
>             Fix For: 0.9
>
>
> User function that extend a RichFunction can access a {{RuntimeContext}} which gives the parallel id of the task and access to Accumulators and BroadcastVariables. 
> Right now, Input and OutputFormats cannot access their {{RuntimeContext}}.



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