unipg.gila.layout

Class Seeder

java.lang.Object

org.apache.giraph.conf.DefaultImmutableClassesGiraphConfigurable<I,V,E>

org.apache.giraph.worker.WorkerAggregatorDelegator<I,V,E>

org.apache.giraph.graph.AbstractComputation<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable,LayoutMessage,LayoutMessage>

unipg.gila.layout.Seeder

All Implemented Interfaces:

org.apache.giraph.aggregators.AggregatorUsage, org.apache.giraph.conf.GiraphConfigurationSettable<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable>, org.apache.giraph.conf.ImmutableClassesGiraphConfigurable<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable>, org.apache.giraph.conf.TypesHolder<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable,LayoutMessage,LayoutMessage>, org.apache.giraph.graph.Computation<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable,LayoutMessage,LayoutMessage>, org.apache.giraph.worker.WorkerAggregatorUsage, org.apache.giraph.worker.WorkerBroadcastUsage, org.apache.giraph.worker.WorkerGlobalCommUsage, org.apache.giraph.worker.WorkerReduceUsage

public class Seeder
extends org.apache.giraph.graph.AbstractComputation<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable,LayoutMessage,LayoutMessage>

The seeding class works as follows. = At the first superstep each vertex just broadcasts its coordinates to its neigbors. = At every other superstep each vertex moderates the force vector acting on it and notifies if it moves less than the defined threshold set using "layout.accuracy" and then broadcasts its updated coordinates.

Author:

Alessio Arleo

Constructor Summary

Constructors

Constructor and Description
Seeder()

Method Summary

Methods

Modifier and Type	Method and Description
void	compute(org.apache.giraph.graph.Vertex<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable> vertex, java.lang.Iterable<LayoutMessage> msgs)
void	initialize(org.apache.giraph.graph.GraphState graphState, org.apache.giraph.comm.WorkerClientRequestProcessor<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable> workerClientRequestProcessor, org.apache.giraph.graph.GraphTaskManager<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable> graphTaskManager, org.apache.giraph.worker.WorkerGlobalCommUsage workerGlobalCommUsage, org.apache.giraph.worker.WorkerContext workerContext)

Methods inherited from class org.apache.giraph.graph.AbstractComputation

addEdgeRequest, addVertexRequest, addVertexRequest, getContext, getSuperstep, getTotalNumEdges, getTotalNumVertices, getWorkerContext, postSuperstep, preSuperstep, removeEdgesRequest, removeVertexRequest, sendMessage, sendMessageToAllEdges, sendMessageToMultipleEdges

Methods inherited from class org.apache.giraph.worker.WorkerAggregatorDelegator

aggregate, getAggregatedValue, getBroadcast, reduce, setWorkerGlobalCommUsage

Methods inherited from class org.apache.giraph.conf.DefaultImmutableClassesGiraphConfigurable

getConf, setConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.giraph.conf.ImmutableClassesGiraphConfigurable

getConf

Methods inherited from interface org.apache.giraph.conf.GiraphConfigurationSettable

setConf

Methods inherited from interface org.apache.giraph.worker.WorkerBroadcastUsage

getBroadcast

Methods inherited from interface org.apache.giraph.worker.WorkerReduceUsage

reduce

Methods inherited from interface org.apache.giraph.worker.WorkerAggregatorUsage

aggregate

Methods inherited from interface org.apache.giraph.aggregators.AggregatorUsage

getAggregatedValue

Constructor Detail

Seeder

public Seeder()

Method Detail

compute

public void compute(org.apache.giraph.graph.Vertex<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable> vertex,
           java.lang.Iterable<LayoutMessage> msgs)
             throws java.io.IOException

Specified by:

compute in interface org.apache.giraph.graph.Computation<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable,LayoutMessage,LayoutMessage>

Specified by:

compute in class org.apache.giraph.graph.AbstractComputation<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable,LayoutMessage,LayoutMessage>

Throws:

java.io.IOException

initialize

public void initialize(org.apache.giraph.graph.GraphState graphState,
              org.apache.giraph.comm.WorkerClientRequestProcessor<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable> workerClientRequestProcessor,
              org.apache.giraph.graph.GraphTaskManager<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable> graphTaskManager,
              org.apache.giraph.worker.WorkerGlobalCommUsage workerGlobalCommUsage,
              org.apache.giraph.worker.WorkerContext workerContext)

Specified by:

initialize in interface org.apache.giraph.graph.Computation<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable,LayoutMessage,LayoutMessage>

Overrides:

initialize in class org.apache.giraph.graph.AbstractComputation<PartitionedLongWritable,CoordinateWritable,org.apache.hadoop.io.NullWritable,LayoutMessage,LayoutMessage>