org.deegree.metadata.persistence
Interface MetadataStoreTransaction

All Known Implementing Classes:

EbrimEOMDStoreTransaction, ISOMetadataStoreTransaction

public interface MetadataStoreTransaction

Provides transactional access to a MetadataStore.

Please note that a transaction must always be ended by calling either commit() or rollback().

Version:

$Revision: 30650 $, $Date: 2011-05-05 11:34:25 +0200 (Do, 05. Mai 2011) $

Author:

Markus Schneider, last edited by: $Author: mschneider $

See Also:

MetadataStore.acquireTransaction()

Method Summary

void	commit() Makes the changes persistent that have been performed in this transaction and releases the transaction instance so other clients may acquire a transaction on the MetadataStore.
int	performDelete(DeleteOperation delete) Performs the given DeleteOperation.
List<String>	performInsert(InsertOperation insert) Performs the given InsertOperation.
int	performUpdate(UpdateOperation update) Performs the given UpdateOperation.
void	rollback() Aborts the changes that have been performed in this transaction and releases the transaction instance so other clients may acquire a transaction on the MetadataStore.

Method Detail

commit

void commit()
            throws MetadataStoreException

Makes the changes persistent that have been performed in this transaction and releases the transaction instance so other clients may acquire a transaction on the MetadataStore.

Throws:

MetadataStoreException - if the committing fails

rollback

void rollback()
              throws MetadataStoreException

Aborts the changes that have been performed in this transaction and releases the transaction instance so other clients may acquire a transaction on the MetadataStore.

Throws:

MetadataStoreException - if the rollback fails

performInsert

List<String> performInsert(InsertOperation insert)
                           throws MetadataStoreException,
                                  MetadataInspectorException

Performs the given InsertOperation. TODO for scalabilitiy reasons and simplicitly, consider changing this to #performInsert (MetadataRecord)

Parameters:

insert - operation to be performed, must not be null

Returns:

identifier of the inserted records, can be empty, but never null

Throws:

MetadataStoreException - if the insertion failed

MetadataInspectorException

performDelete

int performDelete(DeleteOperation delete)
                  throws MetadataStoreException

Performs the given DeleteOperation.

Parameters:

delete - operation to be performed, must not be null

Returns:

number of deleted records

Throws:

MetadataStoreException - if the deletion failed

performUpdate

int performUpdate(UpdateOperation update)
                  throws MetadataStoreException,
                         MetadataInspectorException

Performs the given UpdateOperation.

Parameters:

update - operation to be performed, must not be null

Returns:

number of updated records

Throws:

MetadataStoreException - if the update failed

MetadataInspectorException