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https://issues.apache.org/jira/browse/FLINK-2716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14950446#comment-14950446
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Greg Hogan commented on FLINK-2716:
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{{TaskConfig}} has {{getInputSerializer(int, ClassLoader)}} and
{{getInputComparator(int, ClassLoader)}}. What API could be added to
{{RuntimeContext}} other than {{getInputSerializer(int)}} and
{{getInputComparator(int)}}? Modifying the {{RichFunction}} API with no-arg
functions both informs and restricts the user.
I have thought that serializers and comparators were paired, though in
{{TaskConfig}} there is a single {{OutputSerializer}} and multiple
{{OutputCompators}}.
> Checksum method for DataSet and Graph
> -------------------------------------
>
> Key: FLINK-2716
> URL: https://issues.apache.org/jira/browse/FLINK-2716
> Project: Flink
> Issue Type: Improvement
> Components: Gelly, Java API, Scala API
> Affects Versions: 0.10
> Reporter: Greg Hogan
> Assignee: Greg Hogan
> Priority: Minor
>
> {{DataSet.count()}}, {{Graph.numberOfVertices()}}, and
> {{Graph.numberOfEdges()}} provide measures of the number of distributed data
> elements. New {{DataSet.checksum()}} and {{Graph.checksum()}} methods will
> summarize the content of data elements and support algorithm validation,
> integration testing, and benchmarking.
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