[FLINK-3618] Rename abstract UDF classes in Scatter-Gather implementation

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Implemented
• Affects Version/s: 1.0.1, 1.1.0
• Fix Version/s: 1.1.0
• Component/s: Library / Graph Processing
• Assignee: Greg Hogan
• Reporter: Martin Junghanns
• Created: 16/Mar/16 09:27
• Updated: 30/Jun/16 19:01
• Resolved: 30/Jun/16 19:01

Description

We now offer three Vertex-centric computing abstractions:

• Pregel
• Gather-Sum-Apply
• Scatter-Gather

Each of these abstractions provides abstract classes that need to be implemented by the user:

• Pregel: ComputeFunction
• GSA: GatherFunction, SumFunction, ApplyFunction
• Scatter-Gather: MessagingFunction, VertexUpdateFunction

In Pregel and GSA, the names of those functions follow the name of the abstraction or the name suggested in the corresponding papers. For consistency of the API, I propose to rename MessageFunction to ScatterFunction and VertexUpdateFunction to GatherFunction.

Also for consistency, I would like to change the parameter order in Graph.runScatterGatherIteration(VertexUpdateFunction f1, MessagingFunction f2 to Graph.runScatterGatherIteration(ScatterFunction f1, GatherFunction f2 (like in Graph.runGatherSumApplyFunction(...))

Issue Links

• links to: GitHub Pull Request #2184