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Java Persistence API (JPA) Extensions Reference for EclipseLink, Release 2.4
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@ReplicationPartitioning

Use @ReplicationPartitioning to send requests to a set of connection pools. It is for replicating data across a cluster of database machines. Only modification queries are replicated.


Annotation Elements

Table 2-60 describes this annotation's elements.

Table 2-60 @ReplicationPartitioning Annotation Elements

Annotation Element Description Default

name

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


connectionPools

List of connection pool names to replicate across.

All defined pools in the ServerSession



Usage

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.

The persistence unit properties support adding named connection pools in addition to the existing configuration for read/write/sequence. A named connection pool must be defined for each node in the database cluster.

If a transaction modifies data from multiple partitions, you should use JTA ensure proper two-phase commit of the data. You can also configure an exclusive connection in the EntityManager to ensure that only a single node is used for a single transaction.


Examples

See "Using Partitioning" for an example of partitioning with EclipseLink.


See Also

For more information, see:

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