org.eclipse.persistence.descriptors.partitioning

Class FieldPartitioningPolicy

java.lang.Object

org.eclipse.persistence.descriptors.partitioning.PartitioningPolicy

org.eclipse.persistence.descriptors.partitioning.FieldPartitioningPolicy

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

HashPartitioningPolicy, RangePartitioningPolicy, ValuePartitioningPolicy

public abstract class FieldPartitioningPolicy
extends PartitioningPolicy

PUBLIC: FieldPartitioningPolicy partitions access to a database cluster by a field value from the object, such as the object's id, location, or tenant. 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

Constructor Summary

Constructors

Constructor and Description
FieldPartitioningPolicy()
FieldPartitioningPolicy(java.lang.String partitionField)
FieldPartitioningPolicy(java.lang.String partitionField, boolean unionUnpartitionableQueries)

Method Summary

Modifier and Type	Method and Description
org.eclipse.persistence.internal.helper.DatabaseField	getPartitionField() PUBLIC: Return the database column or query parameter to partition queries by.
java.lang.String	getPartitionFieldName() PUBLIC: Return the database column or query parameter to partition queries by.
boolean	getUnionUnpartitionableQueries() PUBLIC: Return if queries that do not contain the partition field should be sent to every database and have the result unioned.
void	setPartitionField(org.eclipse.persistence.internal.helper.DatabaseField partitionField) PUBLIC: Set the database column or query parameter to partition queries by.
void	setPartitionField(java.lang.String partitionField) PUBLIC: Set the database column or query parameter to partition queries by.
void	setUnionUnpartitionableQueries(boolean unionUnpartitionableQueries) PUBLIC: Set if queries that do not contain the partition field should be sent to every database and have the result unioned.

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

acquireAccessor, convertClassNamesToClasses, getAccessor, getConnectionsForQuery, getName, initialize, partitionPersist, setName

Methods inherited from class java.lang.Object

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

Constructor Detail

FieldPartitioningPolicy

public FieldPartitioningPolicy()

FieldPartitioningPolicy

public FieldPartitioningPolicy(java.lang.String partitionField)

FieldPartitioningPolicy

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

Method Detail

getPartitionField

public org.eclipse.persistence.internal.helper.DatabaseField getPartitionField()

PUBLIC: Return the database column or query parameter to partition queries by. This is the table column name, not the class attribute name. The column value must be included in the query and should normally be part of the object's Id. This can also be the name of a query parameter. If a query does not contain the field the query will not be partitioned.

setPartitionField

public void setPartitionField(org.eclipse.persistence.internal.helper.DatabaseField partitionField)

PUBLIC: Set the database column or query parameter to partition queries by. This is the table column name, not the class attribute name. The column value must be included in the query and should normally be part of the object's Id. This can also be the name of a query parameter. If a query does not contain the field the query will not be partitioned.

getPartitionFieldName

public java.lang.String getPartitionFieldName()

PUBLIC: Return the database column or query parameter to partition queries by. This is the table column name, not the class attribute name. The column value must be included in the query and should normally be part of the object's Id. This can also be the name of a query parameter. If a query does not contain the field the query will not be partitioned.

setPartitionField

public void setPartitionField(java.lang.String partitionField)

PUBLIC: Set the database column or query parameter to partition queries by. This is the table column name, not the class attribute name. The column value must be included in the query and should normally be part of the object's Id. This can also be the name of a query parameter. If a query does not contain the field the query will not be partitioned.

getUnionUnpartitionableQueries

public boolean getUnionUnpartitionableQueries()

PUBLIC: Return if queries that do not contain the partition field should be sent to every database and have the result unioned.

setUnionUnpartitionableQueries

public void setUnionUnpartitionableQueries(boolean unionUnpartitionableQueries)

PUBLIC: Set if queries that do not contain the partition field should be sent to every database and have the result unioned.