org.springframework.data.crossstore

Interface ChangeSetPersister<K>

Type Parameters:

K - entity key

public interface ChangeSetPersister<K>

Interface to be implemented by classes that can synchronize between data stores and ChangeSets.

Author:

Rod Johnson

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	ChangeSetPersister.NotFoundException Exception thrown in alternate control flow if getPersistentState finds no entity data.

Field Summary

Fields

Modifier and Type	Field and Description
static String	CLASS_KEY
static String	ID_KEY

Method Summary

Modifier and Type	Method and Description
K	getPersistentId(ChangeSetBacked entity, ChangeSet cs) Return id
void	getPersistentState(Class<? extends ChangeSetBacked> entityClass, K key, ChangeSet changeSet) TODO how to tell when not found?
K	persistState(ChangeSetBacked entity, ChangeSet cs) Return key

Field Detail

ID_KEY

static final String ID_KEY

See Also:

Constant Field Values

CLASS_KEY

static final String CLASS_KEY

See Also:

Constant Field Values

Method Detail

getPersistentState

void getPersistentState(Class<? extends ChangeSetBacked> entityClass,
                        K key,
                        ChangeSet changeSet)
                 throws org.springframework.dao.DataAccessException,
                        ChangeSetPersister.NotFoundException

TODO how to tell when not found? throw exception?

Throws:

org.springframework.dao.DataAccessException

ChangeSetPersister.NotFoundException

getPersistentId

K getPersistentId(ChangeSetBacked entity,
                  ChangeSet cs)
           throws org.springframework.dao.DataAccessException

Return id

Parameters:

entity -

cs -

Returns:

Throws:

org.springframework.dao.DataAccessException

persistState

K persistState(ChangeSetBacked entity,
               ChangeSet cs)
        throws org.springframework.dao.DataAccessException

Return key

Parameters:

entity -

cs - Key may be null if not persistent

Returns:

Throws:

org.springframework.dao.DataAccessException