org.deegree.commons.utils.nio
Class DirectByteBufferPool

java.lang.Object
  org.deegree.commons.utils.nio.DirectByteBufferPool

public class DirectByteBufferPool
extends java.lang.Object

The DirectByteBufferPool pools a number of direct 'native' bytebuffers so they can be reused.

Version:

$Revision: $, $Date: $

Author:

Markus Schneider, last edited by: $Author: schneider $

Constructor Summary

DirectByteBufferPool(int capacityLimit, java.lang.String name)
Construct a direct byte buffer which may allocate buffers with given capacity

Method Summary

PooledByteBuffer	allocate_(int capacity)
PooledByteBuffer	allocate(int capacity)
boolean	canAllocate(int capacity)
void	deallocate(PooledByteBuffer buffer) Notifies the pool the given buffer is free for use.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DirectByteBufferPool

public DirectByteBufferPool(int capacityLimit,
                            java.lang.String name)

Construct a direct byte buffer which may allocate buffers with given capacity

Parameters:

capacityLimit - total capacity of this pool.

name -

Method Detail

allocate

public PooledByteBuffer allocate(int capacity)
                          throws java.lang.OutOfMemoryError

Parameters:

capacity -

Returns:

the requested byte buffer

Throws:

java.lang.OutOfMemoryError - if no PooledByteBuffer with the given capacity is available and allocating it from the system would exceed the assigned resources

allocate_

public PooledByteBuffer allocate_(int capacity)
                           throws java.lang.OutOfMemoryError

Parameters:

capacity -

Returns:

the requested byte buffer

Throws:

java.lang.OutOfMemoryError - if no PooledByteBuffer with the given capacity is available and allocating it from the system would exceed the assigned resources

deallocate

public void deallocate(PooledByteBuffer buffer)

Notifies the pool the given buffer is free for use.

Parameters:

buffer - to be freed.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

canAllocate

public boolean canAllocate(int capacity)

Parameters:

capacity -

Returns:

true if the pool has more free space.