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

static class

ChangeSetPersister.NotFoundException Exception thrown in alternate control flow if getPersistentState finds no entity data.

Field Summary

static String	CLASS_KEY
static String	ID_KEY

Method Summary

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 DataAccessException,
                               ChangeSetPersister.NotFoundException

TODO how to tell when not found? throw exception?

Throws:

DataAccessException

ChangeSetPersister.NotFoundException

getPersistentId

K getPersistentId(ChangeSetBacked entity,
                  ChangeSet cs)
                  throws DataAccessException

Return id

Parameters:

entity -

cs -

Returns:

Throws:

DataAccessException

persistState

K persistState(ChangeSetBacked entity,
               ChangeSet cs)
               throws DataAccessException

Return key

Parameters:

entity -

cs - Key may be null if not persistent

Returns:

Throws:

DataAccessException