org.eclipse.persistence.annotations

Annotation Type Partitioning

@Target(value={TYPE,METHOD,FIELD})
 @Retention(value=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

Since:

EclipseLink 2.2

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
java.lang.String	name The name of the partition policy, names must be unique for the persistence unit.
java.lang.Class<? extends PartitioningPolicy>	partitioningClass (Required) Full package.class name of a subclass of PartitioningPolicy.

Element Detail

name

public abstract java.lang.String name

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

partitioningClass

public abstract java.lang.Class<? extends PartitioningPolicy> partitioningClass

(Required) Full package.class name of a subclass of PartitioningPolicy.