org.treetank.io.combined

Class CombinedStorage

java.lang.Object

org.treetank.io.combined.CombinedStorage

All Implemented Interfaces:

IBackend

public class CombinedStorage
extends Object
implements IBackend

Combined Storage with a BDB in the front and a JClouds in the back.

Author:

Sebastian Graf, University of Konstanz

Nested Class Summary

Nested classes/interfaces inherited from interface org.treetank.io.IBackend

IBackend.IBackendFactory

Constructor Summary

Constructors

Constructor and Description
CombinedStorage(Properties pProperties, IDataFactory pDataFac, IMetaEntryFactory pMetaFac, IByteHandler.IByteHandlerPipeline pByteHandler) Simple constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closing this storage.
IByteHandler.IByteHandlerPipeline	getByteHandler() Getting the ByteHandlers associated with this Storage.
IBackendReader	getReader() Getting a reader.
IBackendWriter	getWriter() Getting a writer.
void	initialize() Initializing the storage.
boolean	truncate() Truncating a storage.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CombinedStorage

@Inject
public CombinedStorage(Properties pProperties,
                      IDataFactory pDataFac,
                      IMetaEntryFactory pMetaFac,
                      IByteHandler.IByteHandlerPipeline pByteHandler)
                throws TTIOException

Simple constructor.

Parameters:

pProperties - not only the file associated with the database

pDataFac - factory for the datas

pMetaFac - factory for meta bucket

pByteHandler - handling any bytes

Throws:

TTIOException - of something odd happens while database-connection

Method Detail

getWriter

public IBackendWriter getWriter()
                         throws TTException

Getting a writer.

Specified by:

getWriter in interface IBackend

Returns:

an IBackendWriter instance

Throws:

TTIOException - if the initalisation fails

TTException

getReader

public IBackendReader getReader()
                         throws TTException

Getting a reader.

Specified by:

getReader in interface IBackend

Returns:

an IBackendReader instance

Throws:

TTIOException - if the initalisation fails

TTException

close

public void close()
           throws TTException

Closing this storage.

Specified by:

close in interface IBackend

Throws:

TTIOException - exception to be throwns

TTException

getByteHandler

public IByteHandler.IByteHandlerPipeline getByteHandler()

Getting the ByteHandlers associated with this Storage.

Specified by:

getByteHandler in interface IBackend

Returns:

the IByteHandler.IByteHandlerPipeline transforming bytes before storage

truncate

public boolean truncate()
                 throws TTException

Truncating a storage.

Specified by:

truncate in interface IBackend

Returns:

true if successful, false otherwise

Throws:

TTException - if anything weird happens

initialize

public void initialize()
                throws TTIOException

Initializing the storage.

Specified by:

initialize in interface IBackend

Throws:

TTIOException