Class PartitioningPolicy
- java.lang.Object
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- org.eclipse.persistence.descriptors.partitioning.PartitioningPolicy
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- All Implemented Interfaces:
java.io.Serializable
- Direct Known Subclasses:
CustomPartitioningPolicy,FieldPartitioningPolicy,PinnedPartitioningPolicy,ReplicationPartitioningPolicy
public abstract class PartitioningPolicy extends java.lang.Object implements java.io.SerializablePUBLIC: A PartitioningPolicy is used to partition the data for a class across multiple difference databases or across a database cluster such as Oracle RAC. Partitioning can provide improved scalability by allowing multiple database machines to service requests.If multiple partitions are used to process a single transaction, JTA should be used for proper XA transaction support.
- See Also:
- Serialized Form
- Author:
- James Sutherland
- Since:
- EclipseLink 2.2
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Field Summary
Fields Modifier and Type Field Description protected java.lang.StringnameThe persistent unit unique name for the policy.
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Constructor Summary
Constructors Constructor Description PartitioningPolicy()
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description org.eclipse.persistence.internal.databaseaccess.AccessoracquireAccessor(java.lang.String poolName, ServerSession session, DatabaseQuery query, boolean returnNullIfDead)INTERNAL: Return an accessor from the pool.voidconvertClassNamesToClasses(java.lang.ClassLoader classLoader)INTERNAL: Convert all the class-name-based settings to actual class-based settings.org.eclipse.persistence.internal.databaseaccess.AccessorgetAccessor(java.lang.String poolName, org.eclipse.persistence.internal.sessions.AbstractSession session, DatabaseQuery query, boolean returnNullIfDead)INTERNAL: Return an accessor from the pool for the session.abstract 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)java.lang.StringgetName()PUBLIC: Return the name of the policy.voidinitialize(org.eclipse.persistence.internal.sessions.AbstractSession session)INTERNAL: Initialize the policy.voidpartitionPersist(org.eclipse.persistence.internal.sessions.AbstractSession session, java.lang.Object object, ClassDescriptor descriptor)INTERNAL: Allow for the persist call to assign the partition.voidsetName(java.lang.String name)PUBLIC: Set the name of the policy.
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Method Detail
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getConnectionsForQuery
public abstract 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)
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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.
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initialize
public void initialize(org.eclipse.persistence.internal.sessions.AbstractSession session)
INTERNAL: Initialize the policy.
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convertClassNamesToClasses
public void convertClassNamesToClasses(java.lang.ClassLoader classLoader)
INTERNAL: Convert all the class-name-based settings to actual class-based settings. This method is used when converting a project that has been built with class names to a project with classes.
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acquireAccessor
public org.eclipse.persistence.internal.databaseaccess.Accessor acquireAccessor(java.lang.String poolName, ServerSession session, DatabaseQuery query, boolean returnNullIfDead)INTERNAL: Return an accessor from the pool.
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getAccessor
public org.eclipse.persistence.internal.databaseaccess.Accessor getAccessor(java.lang.String poolName, org.eclipse.persistence.internal.sessions.AbstractSession session, DatabaseQuery query, boolean returnNullIfDead)INTERNAL: Return an accessor from the pool for the session. For a client session the accessor is stored for the duration of the transaction.
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getName
public java.lang.String getName()
PUBLIC: Return the name of the policy. The name must be unique for the persistence unit. The name allows the policy to be shared among multiple descriptors, queries.
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setName
public void setName(java.lang.String name)
PUBLIC: Set the name of the policy. The name must be unique for the persistence unit. The name allows the policy to be shared among multiple descriptors, queries.
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