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org.eclipse.persistence.descriptors.partitioning
Class RangePartitioningPolicy

java.lang.Object
org.eclipse.persistence.descriptors.partitioning.PartitioningPolicy
org.eclipse.persistence.descriptors.partitioning.FieldPartitioningPolicy
org.eclipse.persistence.descriptors.partitioning.RangePartitioningPolicy

All Implemented Interfaces:

java.io.Serializable

public class RangePartitioningPolicy

extends FieldPartitioningPolicy

PUBLIC: RangePartitioningPolicy partitions access to a database cluster by a field value from the object, such as the object's id, location, or tenant. Each server is assigned a range of values. All write or read request for object's with that value are sent to the server. If a query does not include the field as a parameter, then it can either be sent to all server's and unioned, or left to the sesion's default behavior.

Since:

EclipseLink 2.2

Author:

James Sutherland

See Also:

Serialized Form

Field Summary

protected java.util.List<RangePartition>

partitions

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

partitionField, unionUnpartitionableQueries

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

name

Constructor Summary

RangePartitioningPolicy()

RangePartitioningPolicy(java.lang.String partitionField)

RangePartitioningPolicy(java.lang.String partitionField, boolean unionUnpartitionableQueries)

RangePartitioningPolicy(java.lang.String partitionField, RangePartition... partitions)

Method Summary

void	addPartition(RangePartition partition) PUBLIC: Add the range partition.
void	addPartition(java.lang.String connectionPool, java.lang.Comparable startValue, java.lang.Comparable endValue) PUBLIC: Add the range partition.
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.
java.util.List<RangePartition>	getPartitions() PUBLIC: Return the range partitions.
void	partitionPersist(org.eclipse.persistence.internal.sessions.AbstractSession session, java.lang.Object object, ClassDescriptor descriptor) INTERNAL: Allow for the persist call to assign the partition.
void	setPartitions(java.util.List<RangePartition> partitions) PUBLIC: Set the range partitions.

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

extractPartitionValueForPersist, getPartitionField, getPartitionFieldName, getUnionUnpartitionableQueries, setPartitionField, setPartitionField, setUnionUnpartitionableQueries

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

acquireAccessor, convertClassNamesToClasses, getAccessor, getName, initialize, setName

Methods inherited from class java.lang.Object

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

Field Detail

partitions

protected java.util.List<RangePartition> partitions

Constructor Detail

RangePartitioningPolicy

public RangePartitioningPolicy()

RangePartitioningPolicy

public RangePartitioningPolicy(java.lang.String partitionField)

RangePartitioningPolicy

public RangePartitioningPolicy(java.lang.String partitionField,
                               boolean unionUnpartitionableQueries)

RangePartitioningPolicy

public RangePartitioningPolicy(java.lang.String partitionField,
                               RangePartition... partitions)

Method Detail

getPartitions

public java.util.List<RangePartition> getPartitions()

PUBLIC: Return the range partitions. Each partition represents a range of value to route to a connection pool. Range values should not overlap.

setPartitions

public void setPartitions(java.util.List<RangePartition> partitions)

PUBLIC: Set the range partitions. Each partition represents a range of value to route to a connection pool. Range values should not overlap.

addPartition

public void addPartition(java.lang.String connectionPool,
                         java.lang.Comparable startValue,
                         java.lang.Comparable endValue)

PUBLIC: Add the range partition.

addPartition

public void addPartition(RangePartition partition)

PUBLIC: Add the range partition.

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.

Specified by:

getConnectionsForQuery in class PartitioningPolicy

partitionPersist

public void partitionPersist(org.eclipse.persistence.internal.sessions.AbstractSession session,
                             java.lang.Object object,
                             ClassDescriptor descriptor)

INTERNAL: Allow for the persist call to assign the partition.

Overrides:

partitionPersist in class PartitioningPolicy

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