org.apache.cassandra.io.util

Class SimpleCachedBufferPool

java.lang.Object

org.apache.cassandra.io.util.SimpleCachedBufferPool

public class SimpleCachedBufferPool
extends java.lang.Object

A very simple Bytebuffer pool with a fixed allocation size and a cached max allocation count. Will allow you to go past the "max", freeing all buffers allocated beyond the max buffer count on release. Has a reusable thread local ByteBuffer that users can make use of.

Constructor Summary

Constructors

Constructor and Description
SimpleCachedBufferPool(int maxBufferPoolSize, int bufferSize, BufferType preferredReusableBufferType)

Method Summary

Modifier and Type	Method and Description
boolean	atLimit() Checks if the number of used buffers has exceeded the maximum number of cached buffers.
java.nio.ByteBuffer	createBuffer()
void	emptyBufferPool() Empties the buffer pool.
java.nio.ByteBuffer	getThreadLocalReusableBuffer(int size)
void	releaseBuffer(java.nio.ByteBuffer buffer)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleCachedBufferPool

public SimpleCachedBufferPool(int maxBufferPoolSize,
                              int bufferSize,
                              BufferType preferredReusableBufferType)

Method Detail

createBuffer

public java.nio.ByteBuffer createBuffer()

getThreadLocalReusableBuffer

public java.nio.ByteBuffer getThreadLocalReusableBuffer(int size)

releaseBuffer

public void releaseBuffer(java.nio.ByteBuffer buffer)

emptyBufferPool

public void emptyBufferPool()

Empties the buffer pool.

atLimit

public boolean atLimit()

Checks if the number of used buffers has exceeded the maximum number of cached buffers.

Returns:

true if the number of used buffers has exceeded the maximum number of cached buffers, false otherwise.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object