Top Description Methods
org.eclipse.persistence.annotations

public @Interface UnionPartitioning

extends Annotation
Annotations
@Target:TYPE, METHOD, FIELD
@Retention:RUNTIME
Imports
java.lang.annotation.Retention, .Target
UnionPartitioning sends queries to all connection pools and unions the results. This is for queries or relationships that span partitions when partitioning is used, such as on a ManyToMany cross partition relationship.

Partitioning can be enabled on an Entity, relationship, query, or session/persistence unit. Partition policies are globally named to allow reuse, the partitioning policy must also be set using the @Partitioned annotation to be used.

Author
James Sutherland
Since
EclipseLink 2.2
See Also
Partitioned, org.eclipse.persistence.descriptors.partitioning.UnionPartitioningPolicy

Method Summary

Modifier and TypeMethod and Description
public String[]
connectionPools()

List of connection pool names to load balance across.

public String
name()

The name of the partition policy, names must be unique for the persistence unit.

public boolean
replicateWrites()

Defines if write queries should be replicated.

Inherited from java.lang.annotation.Annotation:
annotationTypeequalshashCodetoString

Method Detail

connectionPoolsback to summary
public String[] connectionPools()

List of connection pool names to load balance across. Defaults to all defined pools in the ServerSession.

nameback to summary
public String name()

The name of the partition policy, names must be unique for the persistence unit.

replicateWritesback to summary
public boolean replicateWrites()

Defines if write queries should be replicated. Writes are normally not replicated when unioning, but can be for ManyToMany relationships, when the join table needs to be replicated.