org.janusgraph.graphdb.tinkerpop.optimize.step

Class JanusGraphEdgeVertexStep

java.lang.Object

org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep<S,E>

org.apache.tinkerpop.gremlin.process.traversal.step.map.FlatMapStep<org.apache.tinkerpop.gremlin.structure.Edge,org.apache.tinkerpop.gremlin.structure.Vertex>

org.apache.tinkerpop.gremlin.process.traversal.step.map.EdgeVertexStep

org.janusgraph.graphdb.tinkerpop.optimize.step.JanusGraphEdgeVertexStep

All Implemented Interfaces:

Serializable, AutoCloseable, Cloneable, Iterator<org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<org.apache.tinkerpop.gremlin.structure.Vertex>>, org.apache.tinkerpop.gremlin.process.traversal.Step<org.apache.tinkerpop.gremlin.structure.Edge,org.apache.tinkerpop.gremlin.structure.Vertex>, org.apache.tinkerpop.gremlin.process.traversal.step.Configuring, org.apache.tinkerpop.gremlin.process.traversal.step.Parameterizing, org.apache.tinkerpop.gremlin.process.traversal.step.Profiling

public class JanusGraphEdgeVertexStep
extends org.apache.tinkerpop.gremlin.process.traversal.step.map.EdgeVertexStep
implements org.apache.tinkerpop.gremlin.process.traversal.step.Profiling

A JanusGraphEdgeVertexStep is identical to a EdgeVertexStep. The only difference being that it can use multiQuery to pre-fetch the vertex properties prior to the execution of any subsequent has steps and so eliminate the need for a network trip for each vertex. It implements the optimisation enabled via the query.batch-property-prefetch config option.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.map.EdgeVertexStep

direction, parameters

Fields inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep

id, labels, nextEnd, nextStep, previousStep, starts, traversal, traverserStepIdAndLabelsSetByChild

Constructor Summary

Constructors

Constructor and Description
JanusGraphEdgeVertexStep(org.apache.tinkerpop.gremlin.process.traversal.step.map.EdgeVertexStep originalStep, int txVertexCacheSize)

Method Summary

Modifier and Type	Method and Description
JanusGraphEdgeVertexStep	clone()
protected org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<org.apache.tinkerpop.gremlin.structure.Vertex>	processNextStart()
void	reset()
void	setMetrics(org.apache.tinkerpop.gremlin.process.traversal.util.MutableMetrics metrics)

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.map.EdgeVertexStep

close, configure, flatMap, getDirection, getParameters, getRequirements, hashCode, reverseDirection, toString

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.map.FlatMapStep

closeIterator

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep

addLabel, addStart, addStarts, equals, getId, getLabels, getNextStep, getPreviousStep, getStarts, getTraversal, hasNext, hasStarts, isTraverserStepIdAndLabelsSetByChild, next, prepareTraversalForNextStep, removeLabel, setId, setNextStep, setPreviousStep, setTraversal

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.Step

equals

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

JanusGraphEdgeVertexStep

public JanusGraphEdgeVertexStep(org.apache.tinkerpop.gremlin.process.traversal.step.map.EdgeVertexStep originalStep,
                                int txVertexCacheSize)

Method Detail

processNextStart

protected org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<org.apache.tinkerpop.gremlin.structure.Vertex> processNextStart()

Overrides:

processNextStart in class org.apache.tinkerpop.gremlin.process.traversal.step.map.FlatMapStep<org.apache.tinkerpop.gremlin.structure.Edge,org.apache.tinkerpop.gremlin.structure.Vertex>

reset

public void reset()

Specified by:

reset in interface org.apache.tinkerpop.gremlin.process.traversal.Step<org.apache.tinkerpop.gremlin.structure.Edge,org.apache.tinkerpop.gremlin.structure.Vertex>

Overrides:

reset in class org.apache.tinkerpop.gremlin.process.traversal.step.map.FlatMapStep<org.apache.tinkerpop.gremlin.structure.Edge,org.apache.tinkerpop.gremlin.structure.Vertex>

clone

public JanusGraphEdgeVertexStep clone()

Specified by:

clone in interface org.apache.tinkerpop.gremlin.process.traversal.Step<org.apache.tinkerpop.gremlin.structure.Edge,org.apache.tinkerpop.gremlin.structure.Vertex>

Overrides:

clone in class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep<org.apache.tinkerpop.gremlin.structure.Edge,org.apache.tinkerpop.gremlin.structure.Vertex>

setMetrics

public void setMetrics(org.apache.tinkerpop.gremlin.process.traversal.util.MutableMetrics metrics)

Specified by:

setMetrics in interface org.apache.tinkerpop.gremlin.process.traversal.step.Profiling