Package org.neo4j.graphalgo.beta.pregel.context

Class MasterComputeContext<CONFIG extends PregelConfig>

java.lang.Object

org.neo4j.graphalgo.beta.pregel.context.PregelContext<CONFIG>

org.neo4j.graphalgo.beta.pregel.context.MasterComputeContext<CONFIG>

public class MasterComputeContext<CONFIG extends PregelConfig>
extends PregelContext<CONFIG>

Field Summary

Fields inherited from class org.neo4j.graphalgo.beta.pregel.context.PregelContext

config

Constructor Summary

Constructors

Constructor	Description
MasterComputeContext(CONFIG config, Graph graph, int iteration, NodeValue nodeValue)

Method Summary

Modifier and Type	Method	Description
double[]	doubleArrayNodeValue(long nodeId, java.lang.String key)	Returns the node value for the given node schema key.
double	doubleNodeValue(long nodeId, java.lang.String key)	Returns the node value for the given node schema key.
void	forEachNode(java.util.function.LongPredicate consumer)	Accepts a consumer function that is called for every node in the graph.
boolean	isInitialSuperstep()	Indicates if the current superstep is the first superstep.
boolean	isMultiGraph()	Indicates whether the input graph is a multi-graph.
long[]	longArrayNodeValue(long nodeId, java.lang.String key)	Returns the node value for the given node schema key.
long	longNodeValue(long nodeId, java.lang.String key)	Returns the node value for the given node schema key.
long	nodeCount()	Number of nodes in the input graph.
long	relationshipCount()	Number of relationships in the input graph.
void	setNodeValue(long nodeId, java.lang.String key, double value)	Sets a node double value for given the node schema key.
void	setNodeValue(long nodeId, java.lang.String key, double[] value)	Sets a node long value for given the node schema key.
void	setNodeValue(long nodeId, java.lang.String key, long value)	Sets a node long value for given the node schema key.
void	setNodeValue(long nodeId, java.lang.String key, long[] value)	Sets a node long value for given the node schema key.
int	superstep()	Returns the current superstep (0-based).

Methods inherited from class org.neo4j.graphalgo.beta.pregel.context.PregelContext

config

Methods inherited from class java.lang.Object

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

Constructor Detail

MasterComputeContext

public MasterComputeContext(CONFIG config,
                            Graph graph,
                            int iteration,
                            NodeValue nodeValue)

Method Detail

isMultiGraph

public boolean isMultiGraph()

Description copied from class: PregelContext

Indicates whether the input graph is a multi-graph.

Specified by:

isMultiGraph in class PregelContext<CONFIG extends PregelConfig>

nodeCount

public long nodeCount()

Description copied from class: PregelContext

Number of nodes in the input graph.

Specified by:

nodeCount in class PregelContext<CONFIG extends PregelConfig>

relationshipCount

public long relationshipCount()

Description copied from class: PregelContext

Number of relationships in the input graph.

Specified by:

relationshipCount in class PregelContext<CONFIG extends PregelConfig>

superstep

public int superstep()

Returns the current superstep (0-based).

isInitialSuperstep

public boolean isInitialSuperstep()

Indicates if the current superstep is the first superstep.

forEachNode

public void forEachNode(java.util.function.LongPredicate consumer)

Accepts a consumer function that is called for every node in the graph. The consumer receives one node id at the time. If the consumer returns true, the next node is passed in. Otherwise the iteration stops.

Parameters:

consumer -

doubleNodeValue

public double doubleNodeValue(long nodeId,
                              java.lang.String key)

Returns the node value for the given node schema key.

Throws:

java.lang.IllegalArgumentException - if the key does not exist or the value is not a double

longNodeValue

public long longNodeValue(long nodeId,
                          java.lang.String key)

Returns the node value for the given node schema key.

Throws:

java.lang.IllegalArgumentException - if the key does not exist or the value is not a long

longArrayNodeValue

public long[] longArrayNodeValue(long nodeId,
                                 java.lang.String key)

Returns the node value for the given node schema key.

Throws:

java.lang.IllegalArgumentException - if the key does not exist or the value is not a long array

doubleArrayNodeValue

public double[] doubleArrayNodeValue(long nodeId,
                                     java.lang.String key)

Returns the node value for the given node schema key.

Throws:

java.lang.IllegalArgumentException - if the key does not exist or the value is not a double array

setNodeValue

public void setNodeValue(long nodeId,
                         java.lang.String key,
                         double value)

Sets a node double value for given the node schema key.

Parameters:

key - node schema key

value - property value

setNodeValue

public void setNodeValue(long nodeId,
                         java.lang.String key,
                         long value)

Sets a node long value for given the node schema key.

Parameters:

key - node schema key

value - property value

setNodeValue

public void setNodeValue(long nodeId,
                         java.lang.String key,
                         long[] value)

Sets a node long value for given the node schema key.

Parameters:

key - node schema key

value - property value

setNodeValue

public void setNodeValue(long nodeId,
                         java.lang.String key,
                         double[] value)

Sets a node long value for given the node schema key.

Parameters:

key - node schema key

value - property value