net.sf.jasperreports.engine.util
Class JRConcurrentSwapFile

java.lang.Object
  net.sf.jasperreports.engine.util.JRSwapFile
      net.sf.jasperreports.engine.util.JRConcurrentSwapFile

public class JRConcurrentSwapFile
extends JRSwapFile

JRSwapFile derived class that uses a FileChannel to perform concurrent I/O on the swap file.

Version:

$Id: JRConcurrentSwapFile.java 5180 2012-03-29 13:23:12Z teodord $

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Nested Class Summary

Nested classes/interfaces inherited from class net.sf.jasperreports.engine.util.JRSwapFile

JRSwapFile.LongQueue, JRSwapFile.SwapHandle

Field Summary

Fields inherited from class net.sf.jasperreports.engine.util.JRSwapFile

file, PROPERTY_DELETE_ON_EXIT

Constructor Summary

JRConcurrentSwapFile(java.lang.String directory, int blockSize, int minGrowCount)
Creates a swap file.

Method Summary

protected void	read(byte[] data, int dataOffset, int dataLength, long fileOffset)
protected void	write(byte[] data, int dataSize, int dataOffset, long fileOffset)

Methods inherited from class net.sf.jasperreports.engine.util.JRSwapFile

dispose, finalize, free, freeBlocks, read, reserveFreeBlocks, write

Methods inherited from class java.lang.Object

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

Constructor Detail

JRConcurrentSwapFile

public JRConcurrentSwapFile(java.lang.String directory,
                            int blockSize,
                            int minGrowCount)

Creates a swap file. The file name is generated automatically.

Parameters:

directory - the directory where the file should be created.

blockSize - the size of the blocks allocated by the swap file

minGrowCount - the minimum number of blocks by which the swap file grows when full

Method Detail

write

protected void write(byte[] data,
                     int dataSize,
                     int dataOffset,
                     long fileOffset)
              throws java.io.IOException

Overrides:

write in class JRSwapFile

Throws:

java.io.IOException

read

protected void read(byte[] data,
                    int dataOffset,
                    int dataLength,
                    long fileOffset)
             throws java.io.IOException

Overrides:

read in class JRSwapFile

Throws:

java.io.IOException