com.gc.iotools.stream.store

Class ThresholdStore

java.lang.Object

com.gc.iotools.stream.store.ThresholdStore

All Implemented Interfaces:

SeekableStore, Store

public class ThresholdStore
extends Object
implements SeekableStore

Store that puts data in memory until threshold size is reach. At that point data is written to the disk.

Since:

1.2.0

Version:

$Id: ThresholdStore.java 463 2013-01-21 23:54:17Z G.Contini@gmail.com $

Author:

G.Contini

Constructor Summary

Constructors

Constructor and Description
ThresholdStore(int treshold) Constructor for ThresholdStore.
ThresholdStore(int treshold, File file) Constructor for ThresholdStore.

Method Summary

Modifier and Type	Method and Description
void	cleanup() Cleans up the Store.
protected void	finalize() Clean up the temporary files eventually open.
int	get(byte[] bytes, int offset, int length) gets length bytes from the store.
long	getSize() Getter for the field size.
int	getTreshold() Getter for the field treshold.
void	put(byte[] bytes, int offset, int length) put
void	seek(long position) Reposition this Store on a previously read position.
void	setPosition(long position) Setter for the field position.
String	toString() Provides a String representation of the state of the Store for debugging purposes.

Methods inherited from class java.lang.Object

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

Constructor Detail

ThresholdStore

public ThresholdStore(int treshold)

Constructor for ThresholdStore.

Parameters:

treshold - a int.

ThresholdStore

public ThresholdStore(int treshold,
                      File file)

Constructor for ThresholdStore.

Parameters:

treshold - a int.

file - a File object.

Method Detail

cleanup

public void cleanup()

Cleans up the Store. Forget all the data previously stored.

Specified by:

cleanup in interface Store

finalize

protected void finalize()
                 throws Throwable

Clean up the temporary files eventually open.

Overrides:

finalize in class Object

Throws:

Throwable

get

public int get(byte[] bytes,
               int offset,
               int length)
        throws IOException

gets length bytes from the store.

Specified by:

get in interface Store

Parameters:

bytes - array where to put the data in.

offset - offset in the array to start put the data.

length - length of the bytes got from the store.

Returns:

number of bytes effectively put in the array or -1 if the Store was empty.

Throws:

IOException - when an error occurs in the store, and data can't be retrieved.

getSize

public long getSize()

Getter for the field size.

Returns:

a long.

getTreshold

public int getTreshold()

Getter for the field treshold.

Returns:

a int.

put

public void put(byte[] bytes,
                int offset,
                int length)
         throws IOException

put

Specified by:

put in interface Store

Parameters:

bytes - an array of byte.

offset - a int.

length - a int.

Throws:

IOException - if any.

seek

public void seek(long position)
          throws IOException

Reposition this Store on a previously read position.

Specified by:

seek in interface SeekableStore

Parameters:

position - position to read the data from.

Throws:

IOException - If some error in the internal store happens.

EOFException - If a position is greater than the actual Store size.

setPosition

public void setPosition(long position)

Setter for the field position.

Parameters:

position - a long.

toString

public String toString()

Provides a String representation of the state of the Store for debugging purposes.

Overrides:

toString in class Object