ibis.constellation.util

Class ByteBufferCache

java.lang.Object

ibis.constellation.util.ByteBufferCache

public class ByteBufferCache
extends java.lang.Object

A cache of direct ByteBuffers of specific sizes. This class is not specifically part of constellation, but it may be useful for applications. This class is thread-safe.

Constructor Summary

Constructors

Constructor and Description
ByteBufferCache()

Method Summary

Modifier and Type	Method and Description
static java.nio.ByteBuffer	getByteBuffer(int sz, boolean needsClearing) Obtains a byte buffer of the specified size.
static void	initializeByteBuffers(int sz, int count) Initializes the byte buffer cache with the specified number of buffers of the specified size.
static void	makeAvailableByteBuffer(java.nio.ByteBuffer b) Make the specified byte buffer available for use, that is, append it to the list of available byte buffers.

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteBufferCache

public ByteBufferCache()

Method Detail

makeAvailableByteBuffer

public static void makeAvailableByteBuffer(java.nio.ByteBuffer b)

Make the specified byte buffer available for use, that is, append it to the list of available byte buffers.

Parameters:

b - the byte buffer to be made available.

getByteBuffer

public static java.nio.ByteBuffer getByteBuffer(int sz,
                                                boolean needsClearing)

Obtains a byte buffer of the specified size. If one cannot be found in the cache, a new one is allocated. If it needs to be clear(ed), the needsClearing flag should be set to true.

Parameters:

sz - size of the byte buffer to be obtained.

needsClearing - whether the buffer must be cleared.

Returns:

the obtained byte buffer.

initializeByteBuffers

public static void initializeByteBuffers(int sz,
                                         int count)

Initializes the byte buffer cache with the specified number of buffers of the specified size.

Parameters:

sz - the size of the byte buffers

count - the number of byte buffers