io.kgraph.library.maxbmatching

Class MaxBMatching

java.lang.Object

io.kgraph.library.maxbmatching.MaxBMatching

All Implemented Interfaces:

ComputeFunction<Long,Integer,MBMEdgeValue,MBMMessage>

public class MaxBMatching
extends Object
implements ComputeFunction<Long,Integer,MBMEdgeValue,MBMMessage>

Greedy algorithm for the Maximum B-Matching problem as described in G. De Francisci Morales, A. Gionis, M. Sozio "Social Content Matching in MapReduce" in * PVLDB: Proceedings of the VLDB Endowment, 4(7):460-469, 2011. Given a weighted undirected graph, with integer capacities assigned to each vertex, the maximum b-matching problem is to select a subgraph of maximum weight * such that the number of edges incident to each vertex in the subgraph does not exceed its capacity. This is a greedy algorithm that provides a 1/2-approximation guarantee.

Nested Class Summary

Nested classes/interfaces inherited from interface io.kgraph.pregel.ComputeFunction

ComputeFunction.Aggregators, ComputeFunction.Callback<K,VV,EV,Message>, ComputeFunction.InitCallback, ComputeFunction.MasterCallback, ComputeFunction.ReadAggregators, ComputeFunction.ReadWriteAggregators

Constructor Summary

Constructors

Constructor and Description
MaxBMatching()

Method Summary

Modifier and Type	Method and Description
void	compute(int superstep, VertexWithValue<Long,Integer> vertex, Iterable<MBMMessage> messages, Iterable<EdgeWithValue<Long,MBMEdgeValue>> edges, ComputeFunction.Callback<Long,Integer,MBMEdgeValue,MBMMessage> cb) The function for computing a new vertex value or sending messages to the next superstep.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.kgraph.pregel.ComputeFunction

init, masterCompute, postSuperstep, preSuperstep

Constructor Detail

MaxBMatching

public MaxBMatching()

Method Detail

compute

public void compute(int superstep,
                    VertexWithValue<Long,Integer> vertex,
                    Iterable<MBMMessage> messages,
                    Iterable<EdgeWithValue<Long,MBMEdgeValue>> edges,
                    ComputeFunction.Callback<Long,Integer,MBMEdgeValue,MBMMessage> cb)

Description copied from interface: ComputeFunction

The function for computing a new vertex value or sending messages to the next superstep.

Specified by:

compute in interface ComputeFunction<Long,Integer,MBMEdgeValue,MBMMessage>

Parameters:

superstep - the count of the current superstep

vertex - the current vertex with its value

messages - a Map of the source vertex and the message sent from the previous superstep

edges - the adjacent edges with their values

cb - a callback for setting a new vertex value or sending messages to the next superstep