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ASF GitHub Bot commented on FLINK-1758: --------------------------------------- Github user vasia commented on a diff in the pull request: https://github.com/apache/flink/pull/576#discussion_r28595115 --- Diff: flink-staging/flink-gelly/src/main/java/org/apache/flink/graph/EdgeDirection.java --- @@ -20,10 +20,10 @@ /** * The EdgeDirection is used to select a node's neighborhood - * by the {@link Graph#reduceOnEdges(EdgesFunction, EdgeDirection)}, - * {@link Graph#reduceOnEdges(EdgesFunctionWithVertexValue, EdgeDirection)}, - * {@link Graph#reduceOnNeighbors(NeighborsFunction, EdgeDirection)} and - * {@link Graph#reduceOnNeighbors(NeighborsFunctionWithVertexValue, EdgeDirection)} + * by the {@link Graph#groupReduceOnEdges(EdgesFunction, EdgeDirection)}, --- End diff -- isn't it used in both cases? > 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 cases, 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)