com.tibbo.aggregate.common.dao

Interface DataDao

All Superinterfaces:

Dao

public interface DataDao
extends Dao

Method Summary

Modifier and Type	Method and Description
void	deleteData(Data data) Delete a persistent data block.
void	deleteData(long dataId) Delete a persistent data block.
Data	getData(long id) Load a persistently stored data block.
DataTable	getStatistics() Returns usage statistics table.
void	saveOrUpdateData(Data data) Persistently save a data block.

Methods inherited from interface com.tibbo.aggregate.common.dao.Dao

isManaged, shutdown

Method Detail

getData

Data getData(long id)
      throws DaoException

Load a persistently stored data block.

Parameters:

id - A unique identified of a previously stored data block.

Returns:

A loaded data block

Throws:

DaoException - If loading has failed

saveOrUpdateData

void saveOrUpdateData(Data data)
               throws DaoException

Persistently save a data block. Block's unique ID is available in the the data block itself. If a block with the same ID already exists, its persistent content should be updated.

Parameters:

data - A binary block to save or update

Throws:

DaoException - If save/update operation has failed

deleteData

void deleteData(Data data)
         throws DaoException

Delete a persistent data block. Normally, block's ID contained in the block itself if required to find and remove it.

Parameters:

data - A data block to delete, including its unique ID

Throws:

DaoException - If removal has failed

deleteData

void deleteData(long dataId)
         throws DaoException

Delete a persistent data block.

Parameters:

dataId - An ID of data block to delete

Throws:

DaoException - If removal has failed

getStatistics

DataTable getStatistics()

Returns usage statistics table.