[jira] [Assigned] (FLINK-1758) Extend Gelly's neighborhood methods

["Andra Lungu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-1758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andra Lungu reassigned FLINK-1758:
----------------------------------

    Assignee: Andra Lungu

> Extend Gelly's neighborhood methods
> -----------------------------------
>
>                 Key: FLINK-1758
>                 URL: https://issues.apache.org/jira/browse/FLINK-1758
>             Project: Flink
>          Issue Type: Improvement
>          Components: Gelly
>    Affects Versions: 0.9
>            Reporter: Vasia Kalavri
>            Assignee: Andra Lungu
>
> Currently, the neighborhood methods only allow returning a single value per vertex. In many case, it is desirable to return several or no value per vertex. This is the case in clustering coefficient computation, vertex-centric jaccard, algorithms where a vertex computes a value per edge or when a vertex computes a value only for some of its neighbors.
> This issue proposes to 
> - change the current reduceOnEdges/reduceOnNeighbors methods to use combinable reduce operations where possible
> - provide groupReduce-versions, which will use a Collector and allow returning none or more values per vertex.



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