ru.goodidea.df.dictionary.datasource
Class DistributedTableClientCache

java.lang.Object
  ru.goodidea.df.dictionary.datasource.DistributedTableClientCache

public class DistributedTableClientCache
extends java.lang.Object

Constructor Summary

DistributedTableClientCache(int chunkSize, int maximumCacheSize, IDistributedTableDataSource tableDataSource)
Creates new DistributedTableClientCache

Method Summary

int	addEntity(Entity entity)
void	dump()
int	indexOf(Key key)
int	maxIndex()
void	remove(int pos)
void	reread(java.lang.String cmd)
Entity	retrieveRowFromCache(int rowIndex) Retrieves a row from the data cache.
int	scanRecord(Key key)
void	sortOccurred() Called after a sort has been carried out to nullify the data in the cache so that the newly sorted data must be fetched from the server.
boolean	updateEntity(int row)

Methods inherited from class java.lang.Object

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

Constructor Detail

DistributedTableClientCache

public DistributedTableClientCache(int chunkSize,
                                   int maximumCacheSize,
                                   IDistributedTableDataSource tableDataSource)
                            throws java.lang.Exception

Creates new DistributedTableClientCache

Parameters:

chunkSize - The number of rows of data that are to be retrieved from the remote store at a time.

maximumCacheSize - The maximum number of rows that will be cached. When this number is exceeded by new data that has been fetched, the oldest data is overwritten. tableDataSource A source of table data, (via the method retrieveRows).

Throws:

java.lang.Exception

Method Detail

remove

public void remove(int pos)

reread

public void reread(java.lang.String cmd)

retrieveRowFromCache

public Entity retrieveRowFromCache(int rowIndex)

Retrieves a row from the data cache. If the row is not currently in the cache it will be retrieved from the DistributedTableDataSource object.

Parameters:

rowIndex - The row index in the table that is to be retrieved.

indexOf

public int indexOf(Key key)

maxIndex

public int maxIndex()

sortOccurred

public void sortOccurred()

Called after a sort has been carried out to nullify the data in the cache so that the newly sorted data must be fetched from the server.

updateEntity

public boolean updateEntity(int row)

addEntity

public int addEntity(Entity entity)

scanRecord

public int scanRecord(Key key)

dump

public void dump()