org.apache.openjpa.slice

Interface ReplicationPolicy

All Known Implementing Classes:

ReplicationPolicy.Default

public interface ReplicationPolicy

Policy to select one or more of the physical databases referred as slice in which a given persistent instance will be persisted. This interface is invoked for entity types that are specified as ReplicatedTypes in the configuration.

Author:

Pinaki Poddar

See Also:

DistributionPolicy

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	ReplicationPolicy.Default Implements a default replication policy to replicate the given instance across all available slices.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String[]	replicate(java.lang.Object pc, java.util.List<java.lang.String> slices, java.lang.Object context) Gets the name of the slices where a given instance will be replicated.

Method Detail

replicate

java.lang.String[] replicate(java.lang.Object pc,
                           java.util.List<java.lang.String> slices,
                           java.lang.Object context)

Gets the name of the slices where a given instance will be replicated.

Parameters:

pc - The newly persistent or to-be-merged object.

slices - list of names of the active slices. The ordering of the list is either explicit openjpa.slice.Names property or implicit i.e. alphabetic order of available identifiers if openjpa.slice.Names is unspecified.

context - generic persistence context managing the given instance.

Returns:

identifier of the slices. This names must match one of the given slice names.

See Also:

DistributedConfiguration.getActiveSliceNames()