org.apache.tinkerpop.gremlin.process.computer.util

Class ComputerGraph

java.lang.Object

org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph

All Implemented Interfaces:

AutoCloseable, Graph, Host

public final class ComputerGraph
extends Object
implements Graph

Author:

Marko A. Rodriguez (http://markorodriguez.com)

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.structure.Graph

Graph.Exceptions, Graph.Features, Graph.Hidden, Graph.OptIn, Graph.OptIns, Graph.OptOut, Graph.OptOuts, Graph.Variables

Field Summary

Fields inherited from interface org.apache.tinkerpop.gremlin.structure.Graph

GRAPH

Method Summary

Modifier and Type	Method and Description
Vertex	addVertex(Object... keyValues) Add a Vertex to the graph given an optional series of key/value pairs.
void	close() Closing a Graph is equivalent to "shutdown" and implies that no futher operations can be executed on the instance.
GraphComputer	compute()
<C extends GraphComputer> C	compute(Class<C> graphComputerClass) Declare the GraphComputer to use for OLAP operations on the graph.
Configuration	configuration() Get the org.apache.commons.configuration.Configuration associated with the construction of this graph.
Iterator<Edge>	edges(Object... edgeIds) Get the Edge objects in this graph with the provided edge ids.
org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph.ComputerVertex	getStarVertex()
static org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph.ComputerVertex	mapReduce(Vertex starVertex)
Transaction	tx() Configure and control the transactions for those graphs that support this feature.
Graph.Variables	variables() A collection of global Graph.Variables associated with the graph.
static org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph.ComputerVertex	vertexProgram(Vertex starVertex, VertexProgram vertexProgram)
Iterator<Vertex>	vertices(Object... vertexIds) Get the Vertex objects in this graph with the provided vertex ids.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tinkerpop.gremlin.structure.Graph

addVertex, features, io, traversal, traversal

Method Detail

vertexProgram

public static org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph.ComputerVertex vertexProgram(Vertex starVertex,
                                                                                                            VertexProgram vertexProgram)

mapReduce

public static org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph.ComputerVertex mapReduce(Vertex starVertex)

getStarVertex

public org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph.ComputerVertex getStarVertex()

addVertex

public Vertex addVertex(Object... keyValues)

Description copied from interface: Graph

Add a Vertex to the graph given an optional series of key/value pairs. These key/values must be provided in an even number where the odd numbered arguments are String property keys and the even numbered arguments are the related property values.

Specified by:

addVertex in interface Graph

Parameters:

keyValues - The key/value pairs to turn into vertex properties

Returns:

The newly created vertex

compute

public <C extends GraphComputer> C compute(Class<C> graphComputerClass)
                                    throws IllegalArgumentException

Description copied from interface: Graph

Declare the GraphComputer to use for OLAP operations on the graph. If the graph does not support graph computer then an UnsupportedOperationException is thrown.

Specified by:

compute in interface Graph

Parameters:

graphComputerClass - The graph computer class to use.

Returns:

A graph computer for processing this graph

Throws:

IllegalArgumentException - if the provided GraphComputer class is not supported.

compute

public GraphComputer compute()
                      throws IllegalArgumentException

Specified by:

compute in interface Graph

Throws:

IllegalArgumentException

vertices

public Iterator<Vertex> vertices(Object... vertexIds)

Description copied from interface: Graph

Get the Vertex objects in this graph with the provided vertex ids. If no ids are provided, get all vertices. Note that a vertex identifier does not need to correspond to the actual id used in the graph. It needs to be a bit more flexible than that in that given the Graph.Features around id support, multiple arguments might be applicable here.

If the graph return true for Graph.Features.ElementFeatures.supportsNumericIds() then it should support filters as with:

• g.vertices(v.id())
• g.vertices(1)
• g.vertices(1L)
• g.vertices(1.0d)
• g.vertices(1.0f)
• g.vertices("1")

If the graph return true for Graph.Features.ElementFeatures.supportsCustomIds() ()} then it should support filters as with:

• g.vertices(v.id())
• g.vertices(v.id().toString())

If the graph return true for Graph.Features.ElementFeatures.supportsAnyIds() ()} then it should support filters as with:

• g.vertices(v.id())

If the graph return true for Graph.Features.ElementFeatures.supportsStringIds() ()} then it should support filters as with:

• g.vertices(v)
• g.vertices(v.id().toString())
• g.vertices("id")

If the graph return true for Graph.Features.ElementFeatures.supportsStringIds() ()} then it should support filters as with:

• g.vertices(v.id().toString())
• g.vertices("id")

Specified by:

vertices in interface Graph

Parameters:

vertexIds - the ids of the vertices to get

Returns:

an Iterator of vertices that match the provided vertex ids

edges

public Iterator<Edge> edges(Object... edgeIds)

Description copied from interface: Graph

Get the Edge objects in this graph with the provided edge ids. If no ids are provided, get all edges. Note that an edge identifier does not need to correspond to the actual id used in the graph. It needs to be a bit more flexible than that in that given the Graph.Features around id support, multiple arguments might be applicable here.

If the graph return true for Graph.Features.ElementFeatures.supportsNumericIds() then it should support filters as with:

• g.edges(e.id())
• g.edges(1)
• g.edges(1L)
• g.edges(1.0d)
• g.edges(1.0f)
• g.edges("1")

If the graph return true for Graph.Features.ElementFeatures.supportsCustomIds() ()} then it should support filters as with:

\
• g.edges(e.id())
• g.edges(e.id().toString())

If the graph return true for Graph.Features.ElementFeatures.supportsAnyIds() ()} then it should support filters as with:

• g.edges(e.id())

If the graph return true for Graph.Features.ElementFeatures.supportsStringIds() ()} then it should support filters as with:

• g.edges(e.id().toString())
• g.edges("id")

Specified by:

edges in interface Graph

Parameters:

edgeIds - the ids of the edges to get

Returns:

an Iterator of edges that match the provided edge ids

tx

public Transaction tx()

Description copied from interface: Graph

Configure and control the transactions for those graphs that support this feature. Note that this method does not indicate the creation of a "transaction" object. A Transaction in the TinkerPop context is a transaction "factory" or "controller" that helps manage transactions owned by the underlying graph database.

Specified by:

tx in interface Graph

variables

public Graph.Variables variables()

Description copied from interface: Graph

A collection of global Graph.Variables associated with the graph. Variables are used for storing metadata about the graph.

Specified by:

variables in interface Graph

Returns:

The variables associated with this graph

configuration

public Configuration configuration()

Description copied from interface: Graph

Get the org.apache.commons.configuration.Configuration associated with the construction of this graph. Whatever configuration was passed to org.apache.tinkerpop.gremlin.structure.util.GraphFactory#open(org.apache.commons.configuration.Configuration) is what should be returned by this method.

Specified by:

configuration in interface Graph

Returns:

the configuration used during graph construction.

close

public void close()
           throws Exception

Description copied from interface: Graph

Closing a Graph is equivalent to "shutdown" and implies that no futher operations can be executed on the instance. Users should consult the documentation of the underlying graph database implementation for what this "shutdown" will mean as it pertains to open transactions. It will typically be the end user's responsibility to synchronize the thread that calls close() with other threads that are accessing open transactions. In other words, be sure that all work performed on the Graph instance is complete prior to calling this method.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Graph

Throws:

Exception