Module eclipselink

Package org.eclipse.persistence.annotations

Annotation Interface Partitioning

@Target({TYPE,METHOD,FIELD})
@Retention(RUNTIME)
public @interface Partitioning

A Partitioning is used to partition the data for a class across multiple difference databases or across a database cluster such as Oracle RAC. Partitioning can provide improved scalability by allowing multiple database machines to service requests. This annotation configures a custom PartitioningPolicy.

If multiple partitions are used to process a single transaction, JTA should be used for proper XA transaction support.

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.

See Also:

• Partitioned
• PartitioningPolicy

Author:

James Sutherland

Required Element Summary

Required Elements

Modifier and Type	Required Element	Description
String	name	The name of the partition policy, names must be unique for the persistence unit.
Class<?>	partitioningClass	A subclass of PartitioningPolicy.

Element Details

name

String name

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

partitioningClass

Class<?> partitioningClass

A subclass of PartitioningPolicy.