Vasia Kalavri created FLINK-1758:
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Summary: 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
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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