org.jacorb.orb

Class BufferManager

java.lang.Object

org.jacorb.orb.AbstractBufferManager

org.jacorb.orb.BufferManager

All Implemented Interfaces:

IBufferManager

Direct Known Subclasses:

JDK15NonSyncBufferManager

public class BufferManager
extends AbstractBufferManager

A BufferManager is used to share a pool of buffers and to implement a buffer allocation policy. This reduces the number of memory allocations and deallocations and the overall memory footprint. Buffers are generally created on demand.

Author:

Gerald Brose

Field Summary

Fields

Modifier and Type	Field and Description
protected Collection[]	bufferPool The buffer pool

Constructor Summary

Constructors

Constructor and Description
BufferManager(Configuration configuration) used to create the singleton ORB buffermanager

Method Summary

Methods

Modifier and Type	Method and Description
protected byte[]	doFetchBuffer(Collection list)
protected void	doReturnBuffer(Collection list, byte[] buffer, int threshold)
byte[]	getBuffer(int size) getBuffer returns a new buffer.
byte[]	getExpandedBuffer(int size) getExpandedBuffer returns a new buffer which size will be calculated according to BufferManager expansion policy.
protected Collection[]	initBufferPool(Configuration configuration, int maxSize)
void	release() release all resources that are held by this buffer
void	returnBuffer(byte[] current, boolean cdrStr) Describe returnBuffer method here.
protected void	storeBuffer(int position, byte[] buffer)

Methods inherited from class org.jacorb.orb.AbstractBufferManager

getPreferredMemoryBuffer, returnBuffer

Methods inherited from class java.lang.Object

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

Field Detail

bufferPool

protected final Collection[] bufferPool

The buffer pool

Constructor Detail

BufferManager

public BufferManager(Configuration configuration)

used to create the singleton ORB buffermanager

Parameters:

configuration -

Method Detail

storeBuffer

protected void storeBuffer(int position,
               byte[] buffer)

initBufferPool

protected Collection[] initBufferPool(Configuration configuration,
                          int maxSize)

getExpandedBuffer

public byte[] getExpandedBuffer(int size)

Description copied from interface: IBufferManager

getExpandedBuffer returns a new buffer which size will be calculated according to BufferManager expansion policy.

Specified by:

getExpandedBuffer in interface IBufferManager

Overrides:

getExpandedBuffer in class AbstractBufferManager

Parameters:

size - an int value

Returns:

a byte[] value

getBuffer

public byte[] getBuffer(int size)

getBuffer returns a new buffer.

Parameters:

size - an int value

Returns:

a byte[] value

doFetchBuffer

protected byte[] doFetchBuffer(Collection list)

returnBuffer

public void returnBuffer(byte[] current,
                boolean cdrStr)

Describe returnBuffer method here.

Specified by:

returnBuffer in interface IBufferManager

Overrides:

returnBuffer in class AbstractBufferManager

Parameters:

current - a byte[] value

cdrStr - a boolean value value to denote if CDROuputStream is caller (may use cache in this situation)

doReturnBuffer

protected void doReturnBuffer(Collection list,
                  byte[] buffer,
                  int threshold)

release

public void release()

Description copied from interface: IBufferManager

release all resources that are held by this buffer

Specified by:

release in interface IBufferManager

Overrides:

release in class AbstractBufferManager