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https://issues.apache.org/jira/browse/FLINK-5152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15692732#comment-15692732
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Vasia Kalavri commented on FLINK-5152:
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Hi [~otherwise777],
this is an example of _weighted_ shortest paths. The edge value is added to the
message in the scatter function, thus it cannot be NullValue. If you need a
shortest paths implementation that ignores edge values, it should be easy to
modify this example to do that.
> accepting NullValue for EV in Gelly examples
> --------------------------------------------
>
> Key: FLINK-5152
> URL: https://issues.apache.org/jira/browse/FLINK-5152
> Project: Flink
> Issue Type: Improvement
> Components: Gelly
> Affects Versions: 1.1.3
> Reporter: wouter ligtenberg
> Fix For: 1.1.3
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> In this gelly example [1] an EdgeValue of Double is required but never used,
> wouldn't it be better to change this into a NullValue? I create a lot of data
> without Edge Values and it seems to me that it's more efficient
> I'd like to hear your thoughts on this
> [1]
> https://github.com/apache/flink/blob/master/flink-libraries/flink-gelly-examples/src/main/java/org/apache/flink/graph/examples/SingleSourceShortestPaths.java
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