com.thinkaurelius.titan.graphdb.database.idassigner.placement

Class PropertyPlacementStrategy

java.lang.Object

com.thinkaurelius.titan.graphdb.database.idassigner.placement.SimpleBulkPlacementStrategy

com.thinkaurelius.titan.graphdb.database.idassigner.placement.PropertyPlacementStrategy

All Implemented Interfaces:

IDPlacementStrategy

public class PropertyPlacementStrategy
extends SimpleBulkPlacementStrategy

Author:

Matthias Broecheler (me@matthiasb.com)

Field Summary

Fields

Modifier and Type	Field and Description
static ConfigOption<String>	PARTITION_KEY

Fields inherited from class com.thinkaurelius.titan.graphdb.database.idassigner.placement.SimpleBulkPlacementStrategy

CONCURRENT_PARTITIONS, PARTITION_FINDING_ATTEMPTS

Constructor Summary

Constructors

Constructor and Description
PropertyPlacementStrategy(Configuration config)
PropertyPlacementStrategy(String key, int concurrentPartitions)

Method Summary

Modifier and Type	Method and Description
int	getPartition(InternalElement element) Individually assigns an id to the given vertex or relation.
void	getPartitions(Map<InternalVertex,PartitionAssignment> vertices) Bulk assignment of idAuthorities to vertices.
void	injectIDManager(IDManager idManager) After construction, the IDManager used by this graph instance is injected into this IDPlacementStrategy so that the id pattern of vertices can be inspected.
void	setPartitionKey(String key)

Methods inherited from class com.thinkaurelius.titan.graphdb.database.idassigner.placement.SimpleBulkPlacementStrategy

exhaustedPartition, isExhaustedPartition, setLocalPartitionBounds, supportsBulkPlacement

Methods inherited from class java.lang.Object

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

Field Detail

PARTITION_KEY

public static final ConfigOption<String> PARTITION_KEY

Constructor Detail

PropertyPlacementStrategy

public PropertyPlacementStrategy(Configuration config)

PropertyPlacementStrategy

public PropertyPlacementStrategy(String key,
                                 int concurrentPartitions)

Method Detail

setPartitionKey

public void setPartitionKey(String key)

injectIDManager

public void injectIDManager(IDManager idManager)

Description copied from interface: IDPlacementStrategy

After construction, the IDManager used by this graph instance is injected into this IDPlacementStrategy so that the id pattern of vertices can be inspected. This method is guaranteed to be called before any partition assignments are made.

Specified by:

injectIDManager in interface IDPlacementStrategy

Overrides:

injectIDManager in class SimpleBulkPlacementStrategy

getPartition

public int getPartition(InternalElement element)

Description copied from interface: IDPlacementStrategy

Individually assigns an id to the given vertex or relation.

Specified by:

getPartition in interface IDPlacementStrategy

Overrides:

getPartition in class SimpleBulkPlacementStrategy

Parameters:

element - Vertex or relation to assign id to.

Returns:

getPartitions

public void getPartitions(Map<InternalVertex,PartitionAssignment> vertices)

Description copied from interface: IDPlacementStrategy

Bulk assignment of idAuthorities to vertices.

It is expected that the passed in map contains the partition assignment after this method returns. Any initial values in the map are meaningless and to be ignored.

This is an optional operation. Check with IDPlacementStrategy.supportsBulkPlacement() first.

Specified by:

getPartitions in interface IDPlacementStrategy

Overrides:

getPartitions in class SimpleBulkPlacementStrategy

Parameters:

vertices - Map containing all vertices and their partition placement.