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 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 Description

protected boolean active

protected int flags

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`AbstractEpollStreamChannel(int fd)`
`protected`	`AbstractEpollStreamChannel(Channel parent, int fd)`
`protected`	`AbstractEpollStreamChannel(LinuxSocket fd, boolean active)`

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	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.
`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.util.AttributeMap
attr, hasAttr

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.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
  - 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(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
```
@UnstableApi
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
  - 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

Class AbstractEpollStreamChannel

Nested Class Summary

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

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

Field Summary

Constructor Summary

Method Summary

Methods inherited from class io.netty.channel.AbstractChannel

Methods inherited from class io.netty.util.DefaultAttributeMap

Methods inherited from class java.lang.Object

Methods inherited from interface io.netty.util.AttributeMap

Methods inherited from interface io.netty.channel.Channel

Methods inherited from interface io.netty.channel.ChannelOutboundInvoker

Methods inherited from interface java.lang.Comparable

Field Detail

flags

active

Constructor Detail

AbstractEpollStreamChannel

AbstractEpollStreamChannel

AbstractEpollStreamChannel

Method Detail

newUnsafe

metadata

spliceTo

spliceTo

spliceTo

spliceTo

doWrite

doWriteSingle

filterOutboundMessage

doShutdownOutput

isOutputShutdown

isInputShutdown

isShutdown

shutdownOutput

shutdownOutput

shutdownInput

shutdownInput

shutdown

shutdown

doClose

fd

config

isActive

doDisconnect

isCompatible

isOpen

doDeregister

doBeginRead

doRegister

newDirectBuffer

newDirectBuffer

checkResolvable

doReadBytes

doWriteBytes

doBind

doConnect

localAddress0

remoteAddress0