org.eclipse.scada.hds

Class DataFilePool

java.lang.Object

org.eclipse.scada.hds.DataFilePool

public class DataFilePool
extends Object

Constructor Summary

Constructors

Constructor and Description
DataFilePool(int instanceCountTarget)
DataFilePool(long timeout) Create a new data file pool

Method Summary

Modifier and Type	Method and Description
void	dispose()
DataFileAccessor	getAccessor(File file)
Pair<DataFileAccessor,Boolean>	getAccessor(File file, Date start, Date end, boolean create) get access to a file
void	giveBack(org.eclipse.scada.hds.DataFilePool.AccessorWrapper accessor)
protected org.eclipse.scada.hds.DataFilePool.AccessorWrapper	wrap(File file, DataFileAccessor accessor)

Methods inherited from class java.lang.Object

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

Constructor Detail

DataFilePool

public DataFilePool(int instanceCountTarget)

DataFilePool

public DataFilePool(long timeout)

Create a new data file pool

Parameters:

timeout - in milliseconds

Method Detail

getAccessor

public DataFileAccessor getAccessor(File file)
                             throws Exception

Throws:

Exception

getAccessor

public Pair<DataFileAccessor,Boolean> getAccessor(File file,
                                                  Date start,
                                                  Date end,
                                                  boolean create)
                                           throws Exception

get access to a file

If the parameter create is true then start and end must not be null

Parameters:

file - the file to get access to

start - the start date required for creating the file, can be null if create is false

end - the end date required for creating the file, can be null if create is false

create - true will create a new file it if the file does not currently exists

Returns:

the accessor information

Throws:

Exception - if anything goes wrong

wrap

protected org.eclipse.scada.hds.DataFilePool.AccessorWrapper wrap(File file,
                                                                  DataFileAccessor accessor)

giveBack

public void giveBack(org.eclipse.scada.hds.DataFilePool.AccessorWrapper accessor)

dispose

public void dispose()