org.eclipse.persistence.descriptors.partitioning
Class UnionPartitioningPolicy

java.lang.Object
  org.eclipse.persistence.descriptors.partitioning.PartitioningPolicy
      org.eclipse.persistence.descriptors.partitioning.ReplicationPartitioningPolicy
          org.eclipse.persistence.descriptors.partitioning.UnionPartitioningPolicy

All Implemented Interfaces:

java.io.Serializable

public class UnionPartitioningPolicy
extends ReplicationPartitioningPolicy

PUBLIC: UnionPartitionPolicy 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.

See Also:

Serialized Form

Author:

James Sutherland

Since:

EclipseLink 2.2

Field Summary

protected boolean

replicateWrites

Fields inherited from class org.eclipse.persistence.descriptors.partitioning.ReplicationPartitioningPolicy

connectionPools

Fields inherited from class org.eclipse.persistence.descriptors.partitioning.PartitioningPolicy

name

Constructor Summary

UnionPartitioningPolicy()

UnionPartitioningPolicy(boolean replicateWrites)

UnionPartitioningPolicy(java.util.List<java.lang.String> pools)

UnionPartitioningPolicy(java.lang.String... pools)

Method Summary

java.util.List<org.eclipse.persistence.internal.databaseaccess.Accessor>	getConnectionsForQuery(org.eclipse.persistence.internal.sessions.AbstractSession session, DatabaseQuery query, org.eclipse.persistence.internal.sessions.AbstractRecord arguments) INTERNAL: Get a connection from one of the pools in a round robin rotation fashion.
boolean	getReplicateWrites() PUBLIC: Return if write queries should be replicated.
void	setReplicateWrites(boolean replicateWrites) PUBLIC: Set if write queries should be replicated.

Methods inherited from class org.eclipse.persistence.descriptors.partitioning.ReplicationPartitioningPolicy

addConnectionPool, getConnectionPools, initialize, setConnectionPools

Methods inherited from class org.eclipse.persistence.descriptors.partitioning.PartitioningPolicy

acquireAccessor, convertClassNamesToClasses, getAccessor, getName, setName

Methods inherited from class java.lang.Object

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

Field Detail

replicateWrites

protected boolean replicateWrites

Constructor Detail

UnionPartitioningPolicy

public UnionPartitioningPolicy()

UnionPartitioningPolicy

public UnionPartitioningPolicy(boolean replicateWrites)

UnionPartitioningPolicy

public UnionPartitioningPolicy(java.lang.String... pools)

UnionPartitioningPolicy

public UnionPartitioningPolicy(java.util.List<java.lang.String> pools)

Method Detail

getReplicateWrites

public boolean getReplicateWrites()

PUBLIC: Return 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.

setReplicateWrites

public void setReplicateWrites(boolean replicateWrites)

PUBLIC: Set 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.

getConnectionsForQuery

public java.util.List<org.eclipse.persistence.internal.databaseaccess.Accessor> getConnectionsForQuery(org.eclipse.persistence.internal.sessions.AbstractSession session,
                                                                                                       DatabaseQuery query,
                                                                                                       org.eclipse.persistence.internal.sessions.AbstractRecord arguments)

INTERNAL: Get a connection from one of the pools in a round robin rotation fashion.

Overrides:

getConnectionsForQuery in class ReplicationPartitioningPolicy