[jira] [Created] (FLINK-1523) Vertex-centric iteration extensions

[Shang Yuanchun (Jira)]

Vasia Kalavri created FLINK-1523:
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             Summary: Vertex-centric iteration extensions
                 Key: FLINK-1523
                 URL: https://issues.apache.org/jira/browse/FLINK-1523
             Project: Flink
          Issue Type: Improvement
          Components: Gelly
            Reporter: Vasia Kalavri


We would like to make the following extensions to the vertex-centric iterations of Gelly:

- allow vertices to access their in/out degrees and the total number of vertices of the graph, inside the iteration.

- allow choosing the neighborhood type (in/out/all) over which to run the vertex-centric iteration. Now, the model uses the updates of the in-neighbors to calculate state and send messages to out-neighbors. We could add a parameter with value "in/out/all" to the {{VertexUpdateFunction}} and {{MessagingFunction}}, that would indicate the type of neighborhood.



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