nl.renarj.jasdb.core.storage.datablocks.impl

Class DataBlockFactoryImpl

java.lang.Object

nl.renarj.jasdb.core.storage.datablocks.impl.DataBlockFactoryImpl

All Implemented Interfaces:

MemoryAware, DataBlockFactory

public class DataBlockFactoryImpl
extends Object
implements DataBlockFactory

Author:

Renze de Vries

Constructor Summary

Constructors

Constructor and Description
DataBlockFactoryImpl(File file, FileChannel fileChannel, int blockSize)

Method Summary

Modifier and Type	Method and Description
void	close()
void	flush()
int	getBlockSize()
DataBlock	getBlockWithSpace(boolean allowFragmented)
long	getCachedBlocks()
DataBlock	getHeaderBlock()
long	getTotalMemoryUsage()
DataBlock	loadBlock(long position)
DataBlock	loadBlockForDataPosition(long dataPosition)
void	open()
void	releaseBlock(long position)

Methods inherited from class java.lang.Object

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

Constructor Detail

DataBlockFactoryImpl

public DataBlockFactoryImpl(File file,
                            FileChannel fileChannel,
                            int blockSize)

Method Detail

open

public void open()
          throws JasDBStorageException

Specified by:

open in interface DataBlockFactory

Throws:

JasDBStorageException

getHeaderBlock

public DataBlock getHeaderBlock()
                         throws JasDBStorageException

Specified by:

getHeaderBlock in interface DataBlockFactory

Throws:

JasDBStorageException

getBlockSize

public int getBlockSize()

Specified by:

getBlockSize in interface DataBlockFactory

getTotalMemoryUsage

public long getTotalMemoryUsage()

Specified by:

getTotalMemoryUsage in interface MemoryAware

getCachedBlocks

public long getCachedBlocks()

Specified by:

getCachedBlocks in interface MemoryAware

loadBlock

public DataBlock loadBlock(long position)
                    throws JasDBStorageException

Specified by:

loadBlock in interface DataBlockFactory

Throws:

JasDBStorageException

loadBlockForDataPosition

public DataBlock loadBlockForDataPosition(long dataPosition)
                                   throws JasDBStorageException

Specified by:

loadBlockForDataPosition in interface DataBlockFactory

Throws:

JasDBStorageException

getBlockWithSpace

public DataBlock getBlockWithSpace(boolean allowFragmented)
                            throws JasDBStorageException

Specified by:

getBlockWithSpace in interface DataBlockFactory

Throws:

JasDBStorageException

releaseBlock

public void releaseBlock(long position)
                  throws JasDBStorageException

Specified by:

releaseBlock in interface DataBlockFactory

Throws:

JasDBStorageException

flush

public void flush()
           throws JasDBStorageException

Specified by:

flush in interface DataBlockFactory

Throws:

JasDBStorageException

close

public void close()
           throws JasDBStorageException

Specified by:

close in interface DataBlockFactory

Throws:

JasDBStorageException