ai.grakn.graql.internal.analytics

Class DegreeStatisticsVertexProgram

java.lang.Object

ai.grakn.graql.internal.analytics.CommonOLAP

ai.grakn.graql.internal.analytics.GraknVertexProgram<Long>

ai.grakn.graql.internal.analytics.DegreeVertexProgram

ai.grakn.graql.internal.analytics.DegreeStatisticsVertexProgram

All Implemented Interfaces:

Cloneable, org.apache.tinkerpop.gremlin.process.computer.VertexProgram<Long>

public class DegreeStatisticsVertexProgram
extends DegreeVertexProgram

The vertex program for computing the degree in statistics.

Author:

Jason Liu

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.process.computer.VertexProgram

org.apache.tinkerpop.gremlin.process.computer.VertexProgram.Builder, org.apache.tinkerpop.gremlin.process.computer.VertexProgram.Features

Field Summary

Fields inherited from class ai.grakn.graql.internal.analytics.DegreeVertexProgram

DEGREE

Fields inherited from interface org.apache.tinkerpop.gremlin.process.computer.VertexProgram

VERTEX_PROGRAM

Constructor Summary

Constructors

Constructor and Description
DegreeStatisticsVertexProgram()
DegreeStatisticsVertexProgram(Set<TypeId> types, Set<TypeId> ofTypeIDs, String randomId)

Method Summary

Modifier and Type	Method and Description
Set<String>	getElementComputeKeys()
Set<org.apache.tinkerpop.gremlin.process.computer.MessageScope>	getMessageScopes(org.apache.tinkerpop.gremlin.process.computer.Memory memory)
void	loadState(org.apache.tinkerpop.gremlin.structure.Graph graph, org.apache.commons.configuration.Configuration configuration) Load persistentProperties and any hard coded fields from an apache config object for use by the spark executor.
void	safeExecute(org.apache.tinkerpop.gremlin.structure.Vertex vertex, org.apache.tinkerpop.gremlin.process.computer.Messenger<Long> messenger, org.apache.tinkerpop.gremlin.process.computer.Memory memory) An alternative to the execute method when ghost vertices are an issue.
boolean	terminate(org.apache.tinkerpop.gremlin.process.computer.Memory memory)

Methods inherited from class ai.grakn.graql.internal.analytics.DegreeVertexProgram

storeState

Methods inherited from class ai.grakn.graql.internal.analytics.GraknVertexProgram

clone, execute, getPreferredPersist, getPreferredResultGraph, setup

Methods inherited from class ai.grakn.graql.internal.analytics.CommonOLAP

toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tinkerpop.gremlin.process.computer.VertexProgram

createVertexProgram, getFeatures, getMapReducers, getMemoryComputeKeys, getMessageCombiner, workerIterationEnd, workerIterationStart

Constructor Detail

DegreeStatisticsVertexProgram

public DegreeStatisticsVertexProgram()

DegreeStatisticsVertexProgram

public DegreeStatisticsVertexProgram(Set<TypeId> types,
                                     Set<TypeId> ofTypeIDs,
                                     String randomId)

Method Detail

loadState

public void loadState(org.apache.tinkerpop.gremlin.structure.Graph graph,
                      org.apache.commons.configuration.Configuration configuration)

Description copied from class: CommonOLAP

Load persistentProperties and any hard coded fields from an apache config object for use by the spark executor.

Specified by:

loadState in interface org.apache.tinkerpop.gremlin.process.computer.VertexProgram<Long>

Overrides:

loadState in class DegreeVertexProgram

Parameters:

graph - the tinker graph

configuration - the apache config object containing the values

getElementComputeKeys

public Set<String> getElementComputeKeys()

Specified by:

getElementComputeKeys in interface org.apache.tinkerpop.gremlin.process.computer.VertexProgram<Long>

Overrides:

getElementComputeKeys in class DegreeVertexProgram

safeExecute

public void safeExecute(org.apache.tinkerpop.gremlin.structure.Vertex vertex,
                        org.apache.tinkerpop.gremlin.process.computer.Messenger<Long> messenger,
                        org.apache.tinkerpop.gremlin.process.computer.Memory memory)

Description copied from class: GraknVertexProgram

An alternative to the execute method when ghost vertices are an issue. Our "Ghostbuster".

Overrides:

safeExecute in class DegreeVertexProgram

Parameters:

vertex - a vertex that may be a ghost

messenger - Tinker message passing object

memory - Tinker memory object

getMessageScopes

public Set<org.apache.tinkerpop.gremlin.process.computer.MessageScope> getMessageScopes(org.apache.tinkerpop.gremlin.process.computer.Memory memory)

Specified by:

getMessageScopes in interface org.apache.tinkerpop.gremlin.process.computer.VertexProgram<Long>

Overrides:

getMessageScopes in class DegreeVertexProgram

terminate

public boolean terminate(org.apache.tinkerpop.gremlin.process.computer.Memory memory)

Specified by:

terminate in interface org.apache.tinkerpop.gremlin.process.computer.VertexProgram<Long>

Overrides:

terminate in class DegreeVertexProgram