org.codehaus.activemq.message.util
Class FileDataBlock

java.lang.Object
  org.codehaus.activemq.message.util.FileDataBlock

class FileDataBlock

extends Object

Simply writes/reads data from a RandomAccessFile

Version:

$Revision: 1.1 $

Constructor Summary

(package private)

FileDataBlock(File file, long maxSize) Constructor

Method Summary

(package private) void	close() close and deletes the block
(package private) boolean	isEnoughSpace(byte[] data) test to if there is enough room in the block to write the data
(package private) byte[]	read() read next chunk of data
(package private) void	write(byte[] data) Write data to the end of the block

Methods inherited from class java.lang.Object

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

Constructor Detail

FileDataBlock

FileDataBlock(File file,
              long maxSize)
        throws IOException

Constructor

Parameters:

file - File handle

maxSize - maximum size (in bytes) for the block

Throws:

IOException

Method Detail

close

void close()
     throws IOException

close and deletes the block

Throws:

IOException

isEnoughSpace

boolean isEnoughSpace(byte[] data)
                throws IOException

test to if there is enough room in the block to write the data

Parameters:

data - bytes to be written

Returns:

true if there is enough space left in the block to write the data

Throws:

IOException

write

void write(byte[] data)
     throws IOException

Write data to the end of the block

Parameters:

data - the bytes to write

Throws:

IOException

read

byte[] read()
      throws IOException

read next chunk of data

Returns:

next chunk of data or null if no more to read

Throws:

IOException