UnionPartitioningPolicy (Oracle Fusion Middleware Java API Reference for Oracle TopLink)

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.

Since:: EclipseLink 2.2
Author:: James Sutherland
See Also:: Serialized Form

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, partitionPersist, 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.