Package io.netty.util.internal

Class DirectCleaner

java.lang.Object

io.netty.util.internal.DirectCleaner

All Implemented Interfaces:

Cleaner

final class DirectCleaner
extends java.lang.Object
implements Cleaner

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	DirectCleaner.CleanableDirectBufferImpl

Constructor Summary

Constructors

Constructor	Description
DirectCleaner()

Method Summary

Modifier and Type	Method	Description
CleanableDirectBuffer	allocate(int capacity)	Create a direct ByteBuffer and return it alongside its cleaning mechanism, in a CleanableDirectBuffer.
void	freeDirectBuffer(java.nio.ByteBuffer buffer)	Free a direct ByteBuffer if possible
boolean	hasExpensiveClean()	Check if the clean operation is "relatively expensive".
CleanableDirectBuffer	reallocate(CleanableDirectBuffer old, int newCapacity)	Reallocate a direct buffer with a new capacity.

Methods inherited from class java.lang.Object

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

Constructor Detail

DirectCleaner

DirectCleaner()

Method Detail

allocate

public CleanableDirectBuffer allocate(int capacity)

Description copied from interface: Cleaner

Create a direct ByteBuffer and return it alongside its cleaning mechanism, in a CleanableDirectBuffer.

Specified by:

allocate in interface Cleaner

Parameters:

capacity - The desired capacity of the direct buffer.

Returns:

The new CleanableDirectBuffer instance.

reallocate

public CleanableDirectBuffer reallocate(CleanableDirectBuffer old,
                                        int newCapacity)

Description copied from interface: Cleaner

Reallocate a direct buffer with a new capacity. The old buffer is consumed and must not be used after this call.

The default implementation allocates a new buffer, copies the data, and frees the old one. Implementations may override this to provide more efficient reallocation (e.g. via Unsafe.reallocateMemory).

Specified by:

reallocate in interface Cleaner

freeDirectBuffer

public void freeDirectBuffer(java.nio.ByteBuffer buffer)

Description copied from interface: Cleaner

Free a direct ByteBuffer if possible

Specified by:

freeDirectBuffer in interface Cleaner

hasExpensiveClean

public boolean hasExpensiveClean()

Description copied from interface: Cleaner

Check if the clean operation is "relatively expensive". Expensive clean operations are fine for pooling allocators, but should be avoided for unpooled buffers.

Specified by:

hasExpensiveClean in interface Cleaner

Returns:

true if this Cleaner has an expensive clean (i.e. CleanableDirectBuffer.clean()) operation.