com.sun.grizzly.memory
Class ByteBufferManager

java.lang.Object
  com.sun.grizzly.memory.ByteBufferManager

All Implemented Interfaces:

MemoryManager<ByteBufferWrapper>, WrapperAware<ByteBufferWrapper>

Direct Known Subclasses:

ByteBufferViewManager, SlabMemoryManagerBase

public class ByteBufferManager
extends Object
implements MemoryManager<ByteBufferWrapper>, WrapperAware<ByteBufferWrapper>

The simple Buffer manager implementation, which works as wrapper above ByteBuffers. It's possible to work either with direct or heap ByteBuffers.

Author:

Jean-Francois Arcand, Alexey Stashok

See Also:

MemoryManager, ByteBuffer

Field Summary

protected boolean

isDirect Is direct ByteBuffer should be used?

Constructor Summary

ByteBufferManager()

ByteBufferManager(boolean isDirect)

Method Summary

ByteBufferWrapper	allocate(int size) Allocated Buffer of the required size.
protected ByteBuffer	allocate0(int size) Allocates ByteBuffer of required size.
boolean	isDirect() Returns true, if ByteBufferManager works with direct ByteBuffers, or false otherwise.
ByteBufferWrapper	reallocate(ByteBufferWrapper oldBuffer, int newSize) Reallocate Buffer to a required size.
void	release(ByteBufferWrapper buffer) Lets JVM Garbage collector to release buffer.
void	setDirect(boolean isDirect) Set true, if ByteBufferManager works with direct ByteBuffers, or false otherwise.
ByteBufferWrapper	wrap(byte[] data) Returns Buffer, which wraps the byte array.
ByteBufferWrapper	wrap(byte[] data, int offset, int length) Returns Buffer, which wraps the part of byte array with specific offset and length.
ByteBufferWrapper	wrap(ByteBuffer byteBuffer) Returns Buffer, which wraps the ByteBuffer.
ByteBufferWrapper	wrap(String s) Returns Buffer, which wraps the String.
ByteBufferWrapper	wrap(String s, Charset charset) Returns Buffer, which wraps the String with the specific Charset.

Methods inherited from class java.lang.Object

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

Field Detail

isDirect

protected boolean isDirect

Is direct ByteBuffer should be used?

Constructor Detail

ByteBufferManager

public ByteBufferManager()

ByteBufferManager

public ByteBufferManager(boolean isDirect)

Method Detail

allocate0

protected ByteBuffer allocate0(int size)

Allocates ByteBuffer of required size.

Parameters:

size - ByteBuffer size.

Returns:

allocated ByteBuffer.

allocate

public ByteBufferWrapper allocate(int size)

Allocated Buffer of the required size.

Specified by:

allocate in interface MemoryManager<ByteBufferWrapper>

Parameters:

size - Buffer size to be allocated.

Returns:

allocated Buffer.

reallocate

public ByteBufferWrapper reallocate(ByteBufferWrapper oldBuffer,
                                    int newSize)

Reallocate Buffer to a required size. Implementation may choose the way, how reallocation could be done, either by allocating new Buffer of required size and copying old Buffer content there, or perform more complex logic related to memory pooling etc.

Specified by:

reallocate in interface MemoryManager<ByteBufferWrapper>

Parameters:

oldBuffer - old Buffer to be reallocated.

newSize - new Buffer required size.

Returns:

reallocated Buffer.

release

public void release(ByteBufferWrapper buffer)

Lets JVM Garbage collector to release buffer.

Specified by:

release in interface MemoryManager<ByteBufferWrapper>

Parameters:

buffer - Buffer to be released.

isDirect

public boolean isDirect()

Returns true, if ByteBufferManager works with direct ByteBuffers, or false otherwise.

Returns:

true, if ByteBufferManager works with direct ByteBuffers, or false otherwise.

setDirect

public void setDirect(boolean isDirect)

Set true, if ByteBufferManager works with direct ByteBuffers, or false otherwise.

Parameters:

isDirect - true, if ByteBufferManager works with direct ByteBuffers, or false otherwise.

wrap

public ByteBufferWrapper wrap(byte[] data)

Returns Buffer, which wraps the byte array.

Specified by:

wrap in interface WrapperAware<ByteBufferWrapper>

Parameters:

data - byte array to wrap

Returns:

Buffer wrapper on top of passed byte array.

wrap

public ByteBufferWrapper wrap(byte[] data,
                              int offset,
                              int length)

Returns Buffer, which wraps the part of byte array with specific offset and length.

Specified by:

wrap in interface WrapperAware<ByteBufferWrapper>

Parameters:

data - byte array to wrap

offset - byte buffer offset

length - byte buffer length

Returns:

Buffer wrapper on top of passed byte array.

wrap

public ByteBufferWrapper wrap(String s)

Returns Buffer, which wraps the String.

Specified by:

wrap in interface WrapperAware<ByteBufferWrapper>

Parameters:

s - String

Returns:

Buffer wrapper on top of passed String.

wrap

public ByteBufferWrapper wrap(String s,
                              Charset charset)

Returns Buffer, which wraps the String with the specific Charset.

Specified by:

wrap in interface WrapperAware<ByteBufferWrapper>

Parameters:

s - String

charset - Charset, which will be used, when converting String to byte array.

Returns:

Buffer wrapper on top of passed String.

wrap

public ByteBufferWrapper wrap(ByteBuffer byteBuffer)

Returns Buffer, which wraps the ByteBuffer.

Specified by:

wrap in interface WrapperAware<ByteBufferWrapper>

Parameters:

byteBuffer - ByteBuffer to wrap

Returns:

Buffer wrapper on top of passed ByteBuffer.