io.netty.channel.epoll

Class AbstractEpollStreamChannel

java.lang.Object

io.netty.util.DefaultAttributeMap

io.netty.channel.AbstractChannel

io.netty.channel.epoll.AbstractEpollStreamChannel

All Implemented Interfaces:

Channel, ChannelOutboundInvoker, DuplexChannel, UnixChannel, AttributeMap, Comparable<Channel>

Direct Known Subclasses:

EpollDomainSocketChannel, EpollSocketChannel

public abstract class AbstractEpollStreamChannel
extends AbstractChannel
implements DuplexChannel

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	AbstractEpollStreamChannel.SpliceInTask

Nested classes/interfaces inherited from class io.netty.channel.AbstractChannel

AbstractChannel.AbstractUnsafe

Nested classes/interfaces inherited from interface io.netty.channel.Channel

Channel.Unsafe

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	active
protected int	flags
protected LinuxSocket	socket

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractEpollStreamChannel(Channel parent, int fd)
protected	AbstractEpollStreamChannel(Channel parent, LinuxSocket fd, SocketAddress remote)
protected	AbstractEpollStreamChannel(int fd)
protected	AbstractEpollStreamChannel(LinuxSocket fd, boolean active)

Method Summary

Modifier and Type	Method and Description
protected static void	checkResolvable(InetSocketAddress addr)
abstract EpollChannelConfig	config() Returns the configuration of this channel.
protected void	doBeginRead() Schedule a read operation.
protected void	doBind(SocketAddress local) Bind the Channel to the SocketAddress
protected void	doClose() Close the Channel
protected boolean	doConnect(SocketAddress remoteAddress, SocketAddress localAddress) Connect to the remote peer
protected void	doDeregister() Deregister the Channel from its EventLoop.
protected void	doDisconnect() Disconnect this Channel from its remote peer
protected int	doReadBytes(ByteBuf byteBuf) Read bytes into the given ByteBuf and return the amount.
protected void	doRegister() Is called after the Channel is registered with its EventLoop as part of the register process.
protected void	doShutdownOutput() Called when conditions justify shutting down the output portion of the channel.
protected void	doWrite(ChannelOutboundBuffer in) Flush the content of the given buffer to the remote peer.
protected int	doWriteBytes(ChannelOutboundBuffer in, ByteBuf buf)
protected int	doWriteSingle(ChannelOutboundBuffer in) Attempt to write a single object.
FileDescriptor	fd() Returns the FileDescriptor that is used by this Channel.
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.
boolean	isActive() Return true if the Channel is active and so connected.
protected boolean	isCompatible(EventLoop loop) Return true if the given EventLoop is compatible with this instance.
boolean	isInputShutdown() Returns true if and only if the remote peer shut down its output so that no more data is received from this channel.
boolean	isOpen() Returns true if the Channel is open and may get active later
boolean	isOutputShutdown()
boolean	isShutdown() Determine if both the input and output of this channel have been shutdown.
protected SocketAddress	localAddress0() Returns the SocketAddress which is bound locally.
ChannelMetadata	metadata() Return the ChannelMetadata of the Channel which describe the nature of the Channel.
protected ByteBuf	newDirectBuffer(ByteBuf buf) Returns an off-heap copy of the specified ByteBuf, and releases the original one.
protected ByteBuf	newDirectBuffer(Object holder, ByteBuf buf) Returns an off-heap copy of the specified ByteBuf, and releases the specified holder.
protected io.netty.channel.epoll.AbstractEpollChannel.AbstractEpollUnsafe	newUnsafe() Create a new AbstractChannel.AbstractUnsafe instance which will be used for the life-time of the Channel
protected SocketAddress	remoteAddress0() Return the SocketAddress which the Channel is connected to.
protected void	setFlag(int flag)
ChannelFuture	shutdown() Will shutdown the input and output sides of this channel.
ChannelFuture	shutdown(ChannelPromise promise) Will shutdown the input and output sides of this channel.
ChannelFuture	shutdownInput()
ChannelFuture	shutdownInput(ChannelPromise promise) Will shutdown the input and notify ChannelPromise.
ChannelFuture	shutdownOutput()
ChannelFuture	shutdownOutput(ChannelPromise promise) Will shutdown the output and notify ChannelPromise.
ChannelFuture	spliceTo(AbstractEpollStreamChannel ch, int len) Splice from this AbstractEpollStreamChannel to another AbstractEpollStreamChannel.
ChannelFuture	spliceTo(AbstractEpollStreamChannel ch, int len, ChannelPromise promise) Splice from this AbstractEpollStreamChannel to another AbstractEpollStreamChannel.
ChannelFuture	spliceTo(FileDescriptor ch, int offset, int len) Splice from this AbstractEpollStreamChannel to another FileDescriptor.
ChannelFuture	spliceTo(FileDescriptor ch, int offset, int len, ChannelPromise promise) Splice from this AbstractEpollStreamChannel to another FileDescriptor.

Methods inherited from class io.netty.channel.AbstractChannel

alloc, bind, bind, bytesBeforeUnwritable, bytesBeforeWritable, close, close, closeFuture, compareTo, connect, connect, connect, connect, deregister, deregister, disconnect, disconnect, equals, eventLoop, flush, hashCode, id, invalidateLocalAddress, invalidateRemoteAddress, isRegistered, isWritable, localAddress, maxMessagesPerWrite, newChannelPipeline, newFailedFuture, newId, newProgressivePromise, newPromise, newSucceededFuture, parent, pipeline, read, remoteAddress, toString, unsafe, validateFileRegion, voidPromise, write, write, writeAndFlush, writeAndFlush

Methods inherited from class io.netty.util.DefaultAttributeMap

attr, hasAttr

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.netty.channel.Channel

alloc, bytesBeforeUnwritable, bytesBeforeWritable, closeFuture, config, eventLoop, flush, id, isActive, isOpen, isRegistered, isWritable, localAddress, parent, pipeline, read, remoteAddress, unsafe

Methods inherited from interface io.netty.util.AttributeMap

attr, hasAttr

Methods inherited from interface io.netty.channel.ChannelOutboundInvoker

bind, bind, close, close, connect, connect, connect, connect, deregister, deregister, disconnect, disconnect, newFailedFuture, newProgressivePromise, newPromise, newSucceededFuture, voidPromise, write, write, writeAndFlush, writeAndFlush

Methods inherited from interface java.lang.Comparable

compareTo

Field Detail

socket

protected final LinuxSocket socket

flags

protected int flags

active

protected volatile boolean active

Constructor Detail

AbstractEpollStreamChannel

protected AbstractEpollStreamChannel(Channel parent,
                                     int fd)

AbstractEpollStreamChannel

protected AbstractEpollStreamChannel(int fd)

AbstractEpollStreamChannel

protected AbstractEpollStreamChannel(Channel parent,
                                     LinuxSocket fd,
                                     SocketAddress remote)

AbstractEpollStreamChannel

protected AbstractEpollStreamChannel(LinuxSocket fd,
                                     boolean active)

Method Detail

newUnsafe

protected io.netty.channel.epoll.AbstractEpollChannel.AbstractEpollUnsafe newUnsafe()

Description copied from class: AbstractChannel

Create a new AbstractChannel.AbstractUnsafe instance which will be used for the life-time of the Channel

metadata

public ChannelMetadata metadata()

Description copied from interface: Channel

Return the ChannelMetadata of the Channel which describe the nature of the Channel.

Specified by:

metadata in interface Channel

spliceTo

public final ChannelFuture spliceTo(AbstractEpollStreamChannel ch,
                                    int len)

Splice from this AbstractEpollStreamChannel to another AbstractEpollStreamChannel. The len is the number of bytes to splice. If using Integer.MAX_VALUE it will splice until the ChannelFuture was canceled or it was failed. Please note:

• both channels need to be registered to the same EventLoop, otherwise an IllegalArgumentException is thrown.
• EpollChannelConfig.getEpollMode() must be EpollMode.LEVEL_TRIGGERED for this and the target AbstractEpollStreamChannel

spliceTo

public final ChannelFuture spliceTo(AbstractEpollStreamChannel ch,
                                    int len,
                                    ChannelPromise promise)

Splice from this AbstractEpollStreamChannel to another AbstractEpollStreamChannel. The len is the number of bytes to splice. If using Integer.MAX_VALUE it will splice until the ChannelFuture was canceled or it was failed. Please note:

• both channels need to be registered to the same EventLoop, otherwise an IllegalArgumentException is thrown.
• EpollChannelConfig.getEpollMode() must be EpollMode.LEVEL_TRIGGERED for this and the target AbstractEpollStreamChannel

spliceTo

public final ChannelFuture spliceTo(FileDescriptor ch,
                                    int offset,
                                    int len)

Splice from this AbstractEpollStreamChannel to another FileDescriptor. The offset is the offset for the FileDescriptor and len is the number of bytes to splice. If using Integer.MAX_VALUE it will splice until the ChannelFuture was canceled or it was failed. Please note:

• EpollChannelConfig.getEpollMode() must be EpollMode.LEVEL_TRIGGERED for this AbstractEpollStreamChannel
• the FileDescriptor will not be closed after the ChannelFuture is notified
• this channel must be registered to an event loop or IllegalStateException will be thrown.

spliceTo

public final ChannelFuture spliceTo(FileDescriptor ch,
                                    int offset,
                                    int len,
                                    ChannelPromise promise)

Splice from this AbstractEpollStreamChannel to another FileDescriptor. The offset is the offset for the FileDescriptor and len is the number of bytes to splice. If using Integer.MAX_VALUE it will splice until the ChannelFuture was canceled or it was failed. Please note:

• EpollChannelConfig.getEpollMode() must be EpollMode.LEVEL_TRIGGERED for this AbstractEpollStreamChannel
• the FileDescriptor will not be closed after the ChannelPromise is notified
• this channel must be registered to an event loop or IllegalStateException will be thrown.

doWrite

protected void doWrite(ChannelOutboundBuffer in)
                throws Exception

Description copied from class: AbstractChannel

Flush the content of the given buffer to the remote peer.

Specified by:

doWrite in class AbstractChannel

Throws:

Exception

doWriteSingle

protected int doWriteSingle(ChannelOutboundBuffer in)
                     throws Exception

Attempt to write a single object.

Parameters:

in - the collection which contains objects to write.

Returns:

The value that should be decremented from the write quantum which starts at ChannelConfig.getWriteSpinCount(). The typical use cases are as follows:

• 0 - if no write was attempted. This is appropriate if an empty ByteBuf (or other empty content) is encountered
• 1 - if a single call to write data was made to the OS
• ChannelUtils.WRITE_STATUS_SNDBUF_FULL - if an attempt to write data was made to the OS, but no data was accepted

Throws:

Exception - If an I/O error occurs.

filterOutboundMessage

protected Object filterOutboundMessage(Object msg)

Description copied from class: AbstractChannel

Invoked when a new message is added to a ChannelOutboundBuffer of this AbstractChannel, so that the Channel implementation converts the message to another. (e.g. heap buffer -> direct buffer)

Overrides:

filterOutboundMessage in class AbstractChannel

doShutdownOutput

protected final void doShutdownOutput()
                               throws Exception

Description copied from class: AbstractChannel

Called when conditions justify shutting down the output portion of the channel. This may happen if a write operation throws an exception.

Overrides:

doShutdownOutput in class AbstractChannel

Throws:

Exception

isOutputShutdown

public boolean isOutputShutdown()

Specified by:

isOutputShutdown in interface DuplexChannel

See Also:

Socket.isOutputShutdown()

isInputShutdown

public boolean isInputShutdown()

Description copied from interface: DuplexChannel

Returns true if and only if the remote peer shut down its output so that no more data is received from this channel. Note that the semantic of this method is different from that of Socket.shutdownInput() and Socket.isInputShutdown().

Specified by:

isInputShutdown in interface DuplexChannel

isShutdown

public boolean isShutdown()

Description copied from interface: DuplexChannel

Determine if both the input and output of this channel have been shutdown.

Specified by:

isShutdown in interface DuplexChannel

shutdownOutput

public ChannelFuture shutdownOutput()

Specified by:

shutdownOutput in interface DuplexChannel

See Also:

Socket.shutdownOutput()

shutdownOutput

public ChannelFuture shutdownOutput(ChannelPromise promise)

Description copied from interface: DuplexChannel

Will shutdown the output and notify ChannelPromise.

Specified by:

shutdownOutput in interface DuplexChannel

See Also:

Socket.shutdownOutput()

shutdownInput

public ChannelFuture shutdownInput()

Specified by:

shutdownInput in interface DuplexChannel

See Also:

Socket.shutdownInput()

shutdownInput

public ChannelFuture shutdownInput(ChannelPromise promise)

Description copied from interface: DuplexChannel

Will shutdown the input and notify ChannelPromise.

Specified by:

shutdownInput in interface DuplexChannel

See Also:

Socket.shutdownInput()

shutdown

public ChannelFuture shutdown()

Description copied from interface: DuplexChannel

Will shutdown the input and output sides of this channel.

Specified by:

shutdown in interface DuplexChannel

Returns:

will be completed when both shutdown operations complete.

shutdown

public ChannelFuture shutdown(ChannelPromise promise)

Description copied from interface: DuplexChannel

Will shutdown the input and output sides of this channel.

Specified by:

shutdown in interface DuplexChannel

Parameters:

promise - will be completed when both shutdown operations complete.

Returns:

will be completed when both shutdown operations complete.

doClose

protected void doClose()
                throws Exception

Description copied from class: AbstractChannel

Close the Channel

Throws:

Exception

setFlag

protected void setFlag(int flag)
                throws IOException

Throws:

IOException

fd

public final FileDescriptor fd()

Description copied from interface: UnixChannel

Returns the FileDescriptor that is used by this Channel.

Specified by:

fd in interface UnixChannel

config

public abstract EpollChannelConfig config()

Description copied from interface: Channel

Returns the configuration of this channel.

Specified by:

config in interface Channel

isActive

public boolean isActive()

Description copied from interface: Channel

Return true if the Channel is active and so connected.

Specified by:

isActive in interface Channel

doDisconnect

protected void doDisconnect()
                     throws Exception

Description copied from class: AbstractChannel

Disconnect this Channel from its remote peer

Specified by:

doDisconnect in class AbstractChannel

Throws:

Exception

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

isOpen

public boolean isOpen()

Description copied from interface: Channel

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

Specified by:

isOpen in interface Channel

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 final void doBeginRead()
                          throws Exception

Description copied from class: AbstractChannel

Schedule a read operation.

Specified by:

doBeginRead in class AbstractChannel

Throws:

Exception

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

newDirectBuffer

protected final ByteBuf newDirectBuffer(ByteBuf buf)

Returns an off-heap copy of the specified ByteBuf, and releases the original one.

newDirectBuffer

protected final ByteBuf newDirectBuffer(Object 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.

checkResolvable

protected static void checkResolvable(InetSocketAddress addr)

doReadBytes

protected final int doReadBytes(ByteBuf byteBuf)
                         throws Exception

Read bytes into the given ByteBuf and return the amount.

Throws:

Exception

doWriteBytes

protected final int doWriteBytes(ChannelOutboundBuffer in,
                                 ByteBuf buf)
                          throws Exception

Throws:

Exception

doBind

protected void doBind(SocketAddress local)
               throws Exception

Description copied from class: AbstractChannel

Bind the Channel to the SocketAddress

Specified by:

doBind in class AbstractChannel

Throws:

Exception

doConnect

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

Connect to the remote peer

Throws:

Exception

localAddress0

protected SocketAddress localAddress0()

Description copied from class: AbstractChannel

Returns the SocketAddress which is bound locally.

Specified by:

localAddress0 in class AbstractChannel

remoteAddress0

protected SocketAddress remoteAddress0()

Description copied from class: AbstractChannel

Return the SocketAddress which the Channel is connected to.

Specified by:

remoteAddress0 in class AbstractChannel