Class AbstractNioChannel

java.lang.Object

io.netty.util.DefaultAttributeMap

io.netty.channel.AbstractChannel

io.netty.channel.nio.AbstractNioChannel

All Implemented Interfaces:

Channel, ChannelOutboundInvoker, AttributeMap, Comparable<Channel>

Direct Known Subclasses:

AbstractNioByteChannel, AbstractNioMessageChannel

public abstract class AbstractNioChannel
extends AbstractChannel

Abstract base class for Channel implementations which use a Selector based approach.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	AbstractNioChannel.AbstractNioUnsafe
static interface	AbstractNioChannel.NioUnsafe	Special Channel.Unsafe sub-type which allows to access the underlying SelectableChannel

Nested classes/interfaces inherited from class AbstractChannel

AbstractChannel.AbstractUnsafe

Modifier and Type	Class	Description
protected class	AbstractChannel.AbstractUnsafe	Channel.Unsafe implementation which sub-classes must extend and use.

Nested classes/interfaces inherited from interface Channel

Channel.Unsafe

Modifier and Type	Interface	Description
static interface	Channel.Unsafe	Unsafe operations that should never be called from user-code.

Field Summary

Fields

Modifier and Type	Field	Description
protected final int	readInterestOp

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractNioChannel(Channel parent, SelectableChannel ch, int readInterestOp)	Create a new instance

Method Summary

Modifier and Type	Method	Description
protected final void	clearReadPending()	Set read pending to false.
protected void	doBeginRead()	Schedule a read operation.
protected void	doClose()	Close the Channel
protected abstract boolean	doConnect(SocketAddress remoteAddress, SocketAddress localAddress)	Connect to the remote peer
protected void	doDeregister()	Deregister the Channel from its EventLoop.
protected abstract void	doFinishConnect()	Finish the connect
protected void	doRegister()	Is called after the Channel is registered with its EventLoop as part of the register process.
NioEventLoop	eventLoop()	Return the EventLoop this Channel was registered to.
protected boolean	isCompatible(EventLoop loop)	Return true if the given EventLoop is compatible with this instance.
boolean	isOpen()	Returns true if the Channel is open and may get active later
protected boolean	isReadPending()	Deprecated. No longer supported.
protected SelectableChannel	javaChannel()
protected final ByteBuf	newDirectBuffer(ByteBuf buf)	Returns an off-heap copy of the specified ByteBuf, and releases the original one.
protected final ByteBuf	newDirectBuffer(ReferenceCounted holder, ByteBuf buf)	Returns an off-heap copy of the specified ByteBuf, and releases the specified holder.
protected SelectionKey	selectionKey()	Return the current SelectionKey
protected void	setReadPending(boolean readPending)	Deprecated. Use clearReadPending() if appropriate instead.
AbstractNioChannel.NioUnsafe	unsafe()	Returns an internal-use-only object that provides unsafe operations.

Methods inherited from class AbstractChannel

alloc, bind, bind, bytesBeforeUnwritable, bytesBeforeWritable, close, close, closeFuture, compareTo, connect, connect, connect, connect, deregister, deregister, disconnect, disconnect, doBind, doDisconnect, doShutdownOutput, doWrite, equals, filterOutboundMessage, flush, hashCode, id, invalidateLocalAddress, invalidateRemoteAddress, isRegistered, isWritable, localAddress, localAddress0, maxMessagesPerWrite, newChannelPipeline, newFailedFuture, newId, newProgressivePromise, newPromise, newSucceededFuture, newUnsafe, parent, pipeline, read, remoteAddress, remoteAddress0, toString, validateFileRegion, voidPromise, write, write, writeAndFlush, writeAndFlush

Modifier and Type	Method	Description
ByteBufAllocator	alloc()	Return the assigned ByteBufAllocator which will be used to allocate ByteBufs.
ChannelFuture	bind(SocketAddress localAddress)	Request to bind to the given SocketAddress and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	bind(SocketAddress localAddress, ChannelPromise promise)	Request to bind to the given SocketAddress and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
long	bytesBeforeUnwritable()	Get how many bytes can be written until Channel.isWritable() returns false.
long	bytesBeforeWritable()	Get how many bytes must be drained from underlying buffers until Channel.isWritable() returns true.
ChannelFuture	close()	Request to close the Channel and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	close(ChannelPromise promise)	Request to close the Channel and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	closeFuture()	Returns the ChannelFuture which will be notified when this channel is closed.
final int	compareTo(Channel o)
ChannelFuture	connect(SocketAddress remoteAddress)	Request to connect to the given SocketAddress and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	connect(SocketAddress remoteAddress, ChannelPromise promise)	Request to connect to the given SocketAddress and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	connect(SocketAddress remoteAddress, SocketAddress localAddress)	Request to connect to the given SocketAddress while bind to the localAddress and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	connect(SocketAddress remoteAddress, SocketAddress localAddress, ChannelPromise promise)	Request to connect to the given SocketAddress while bind to the localAddress and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	deregister()	Request to deregister from the previous assigned EventExecutor and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	deregister(ChannelPromise promise)	Request to deregister from the previous assigned EventExecutor and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	disconnect()	Request to disconnect from the remote peer and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
ChannelFuture	disconnect(ChannelPromise promise)	Request to disconnect from the remote peer and notify the ChannelFuture once the operation completes, either because the operation was successful or because of an error.
protected abstract void	doBind(SocketAddress localAddress)	Bind the Channel to the SocketAddress
protected abstract void	doDisconnect()	Disconnect this Channel from its remote peer
protected void	doShutdownOutput()	Called when conditions justify shutting down the output portion of the channel.
protected abstract void	doWrite(ChannelOutboundBuffer in)	Flush the content of the given buffer to the remote peer.
final boolean	equals(Object o)	Returns true if and only if the specified object is identical with this channel (i.e: this == o).
protected Object	filterOutboundMessage(Object msg)	Invoked when a new message is added to a ChannelOutboundBuffer of this AbstractChannel, so that the Channel implementation converts the message to another.
Channel	flush()	Request to flush all pending messages via this ChannelOutboundInvoker.
final int	hashCode()	Returns the ID of this channel.
final ChannelId	id()	Returns the globally unique identifier of this Channel.
protected void	invalidateLocalAddress()	Deprecated. no use-case for this.
protected void	invalidateRemoteAddress()	Deprecated. no use-case for this.
boolean	isRegistered()	Returns true if the Channel is registered with an EventLoop.
boolean	isWritable()	Returns true if and only if the I/O thread will perform the requested write operation immediately.
SocketAddress	localAddress()	Returns the local address where this channel is bound to.
protected abstract SocketAddress	localAddress0()	Returns the SocketAddress which is bound locally.
protected final int	maxMessagesPerWrite()
protected DefaultChannelPipeline	newChannelPipeline()	Returns a new DefaultChannelPipeline instance.
ChannelFuture	newFailedFuture(Throwable cause)	Create a new ChannelFuture which is marked as failed already.
protected ChannelId	newId()	Returns a new DefaultChannelId instance.
ChannelProgressivePromise	newProgressivePromise()	Return an new ChannelProgressivePromise
ChannelPromise	newPromise()	Return a new ChannelPromise.
ChannelFuture	newSucceededFuture()	Create a new ChannelFuture which is marked as succeeded already.
protected abstract AbstractChannel.AbstractUnsafe	newUnsafe()	Create a new AbstractChannel.AbstractUnsafe instance which will be used for the life-time of the Channel
Channel	parent()	Returns the parent of this channel.
ChannelPipeline	pipeline()	Return the assigned ChannelPipeline.
Channel	read()	Request to Read data from the Channel into the first inbound buffer, triggers an ChannelInboundHandler.channelRead(ChannelHandlerContext, Object) event if data was read, and triggers a channelReadComplete event so the handler can decide to continue reading.
SocketAddress	remoteAddress()	Returns the remote address where this channel is connected to.
protected abstract SocketAddress	remoteAddress0()	Return the SocketAddress which the Channel is connected to.
String	toString()	Returns the String representation of this channel.
protected void	validateFileRegion(DefaultFileRegion region, long position)
final ChannelPromise	voidPromise()	Return a special ChannelPromise which can be reused for different operations.
ChannelFuture	write(Object msg)	Request to write a message via this ChannelHandlerContext through the ChannelPipeline.
ChannelFuture	write(Object msg, ChannelPromise promise)	Request to write a message via this ChannelHandlerContext through the ChannelPipeline.
ChannelFuture	writeAndFlush(Object msg)	Shortcut for call ChannelOutboundInvoker.write(Object) and ChannelOutboundInvoker.flush().
ChannelFuture	writeAndFlush(Object msg, ChannelPromise promise)	Shortcut for call ChannelOutboundInvoker.write(Object, ChannelPromise) and ChannelOutboundInvoker.flush().

Methods inherited from class DefaultAttributeMap

attr, hasAttr

Modifier and Type	Method	Description
<T> Attribute<T>	attr(AttributeKey<T> key)	Get the Attribute for the given AttributeKey.
<T> boolean	hasAttr(AttributeKey<T> key)	Returns true if and only if the given Attribute exists in this AttributeMap.

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface Channel

config, isActive, metadata

Modifier and Type	Method	Description
ChannelConfig	config()	Returns the configuration of this channel.
boolean	isActive()	Return true if the Channel is active and so connected.
ChannelMetadata	metadata()	Return the ChannelMetadata of the Channel which describe the nature of the Channel.

Field Details

readInterestOp

protected final int readInterestOp

Constructor Details

AbstractNioChannel

protected AbstractNioChannel(Channel parent,
 SelectableChannel ch,
 int readInterestOp)

Create a new instance

Parameters:

parent - the parent Channel by which this instance was created. May be null

ch - the underlying SelectableChannel on which it operates

readInterestOp - the ops to set to receive data from the SelectableChannel

Method Details

isOpen

public boolean isOpen()

Description copied from interface: Channel

Returns true if the Channel is open and may get active later

unsafe

public AbstractNioChannel.NioUnsafe unsafe()

Description copied from interface: Channel

Returns an internal-use-only object that provides unsafe operations.

Specified by:

unsafe in interface Channel

Overrides:

unsafe in class AbstractChannel

javaChannel

protected SelectableChannel javaChannel()

eventLoop

public NioEventLoop eventLoop()

Description copied from interface: Channel

Return the EventLoop this Channel was registered to.

Specified by:

eventLoop in interface Channel

Overrides:

eventLoop in class AbstractChannel

selectionKey

protected SelectionKey selectionKey()

Return the current SelectionKey

isReadPending

@Deprecated
protected boolean isReadPending()

Deprecated.

No longer supported. No longer supported.

setReadPending

@Deprecated
protected void setReadPending(boolean readPending)

Deprecated.

Use clearReadPending() if appropriate instead. No longer supported.

clearReadPending

protected final void clearReadPending()

Set read pending to false.

isCompatible

protected boolean isCompatible(EventLoop loop)

Description copied from class: AbstractChannel

Return true if the given EventLoop is compatible with this instance.

Specified by:

isCompatible in class AbstractChannel

doRegister

protected void doRegister()
                   throws Exception

Description copied from class: AbstractChannel

Is called after the Channel is registered with its EventLoop as part of the register process. Sub-classes may override this method

Overrides:

doRegister in class AbstractChannel

Throws:

Exception

doDeregister

protected void doDeregister()
                     throws Exception

Description copied from class: AbstractChannel

Deregister the Channel from its EventLoop. Sub-classes may override this method

Overrides:

doDeregister in class AbstractChannel

Throws:

Exception

doBeginRead

protected void doBeginRead()
                    throws Exception

Description copied from class: AbstractChannel

Schedule a read operation.

Specified by:

doBeginRead in class AbstractChannel

Throws:

Exception

doConnect

protected abstract boolean doConnect(SocketAddress remoteAddress,
 SocketAddress localAddress)
                              throws Exception

Connect to the remote peer

Throws:

Exception

doFinishConnect

protected abstract void doFinishConnect()
                                 throws Exception

Finish the connect

Throws:

Exception

newDirectBuffer

protected final ByteBuf newDirectBuffer(ByteBuf buf)

Returns an off-heap copy of the specified ByteBuf, and releases the original one. Note that this method does not create an off-heap copy if the allocation / deallocation cost is too high, but just returns the original ByteBuf..

newDirectBuffer

protected final ByteBuf newDirectBuffer(ReferenceCounted holder,
 ByteBuf buf)

Returns an off-heap copy of the specified ByteBuf, and releases the specified holder. The caller must ensure that the holder releases the original ByteBuf when the holder is released by this method. Note that this method does not create an off-heap copy if the allocation / deallocation cost is too high, but just returns the original ByteBuf..

doClose

protected void doClose()
                throws Exception

Description copied from class: AbstractChannel

Close the Channel

Specified by:

doClose in class AbstractChannel

Throws:

Exception