org.jboss.netty.channel

类 SimpleChannelDownstreamHandler

java.lang.Object

org.jboss.netty.channel.SimpleChannelDownstreamHandler

所有已实现的接口:

ChannelDownstreamHandler, ChannelHandler

直接已知子类:

WriteTimeoutHandler

public class SimpleChannelDownstreamHandler
extends java.lang.Object
implements ChannelDownstreamHandler

A ChannelDownstreamHandler which provides an individual handler method for each event type. This handler down-casts the received downstream event into more meaningful sub-type event and calls an appropriate handler method with the down-cast event. The names of the methods starts with the name of the operation and ends with "Requested" (e.g. writeRequested.)

Please use SimpleChannelHandler if you need to implement both ChannelUpstreamHandler and ChannelDownstreamHandler.

Overriding the handleDownstream method

You can override the handleDownstream method just like overriding an ordinary Java method. Please make sure to call super.handleDownstream() so that other handler methods are invoked properly:

public class MyChannelHandler extends SimpleChannelDownstreamHandler {

     @Override
     public void handleDownstream(ChannelHandlerContext ctx, ChannelEvent e) throws Exception {

         // Log all channel state changes.
         if (e instanceof MessageEvent) {
             logger.info("Writing:: " + e);
         }

         super.handleDownstream(ctx, e);
     }
 }

Caution:

Use the *Later(..) methods of the Channels class if you want to send an upstream event from a ChannelDownstreamHandler otherwise you may run into threading issues.

嵌套类概要

从接口继承的嵌套类/接口 org.jboss.netty.channel.ChannelHandler

ChannelHandler.Sharable

构造器概要

构造器

构造器和说明
SimpleChannelDownstreamHandler()

方法概要

方法

限定符和类型	方法和说明
void	bindRequested(ChannelHandlerContext ctx, ChannelStateEvent e) Invoked when Channel.bind(SocketAddress) was called.
void	closeRequested(ChannelHandlerContext ctx, ChannelStateEvent e) Invoked when Channel.close() was called.
void	connectRequested(ChannelHandlerContext ctx, ChannelStateEvent e) Invoked when Channel.connect(SocketAddress) was called.
void	disconnectRequested(ChannelHandlerContext ctx, ChannelStateEvent e) Invoked when Channel.disconnect() was called.
void	handleDownstream(ChannelHandlerContext ctx, ChannelEvent e) Handles the specified downstream event.
void	setInterestOpsRequested(ChannelHandlerContext ctx, ChannelStateEvent e) Invoked when Channel.setInterestOps(int) was called.
void	unbindRequested(ChannelHandlerContext ctx, ChannelStateEvent e) Invoked when Channel.unbind() was called.
void	writeRequested(ChannelHandlerContext ctx, MessageEvent e) Invoked when Channel.write(Object) is called.

从类继承的方法 java.lang.Object

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

构造器详细资料

SimpleChannelDownstreamHandler

public SimpleChannelDownstreamHandler()

方法详细资料

handleDownstream

public void handleDownstream(ChannelHandlerContext ctx,
                    ChannelEvent e)
                      throws java.lang.Exception

Handles the specified downstream event. Down-casts the received downstream event into more meaningful sub-type event and calls an appropriate handler method with the down-casted event.

指定者:

handleDownstream 在接口中 ChannelDownstreamHandler

参数:

ctx - the context object for this handler

e - the downstream event to process or intercept

抛出:

java.lang.Exception

writeRequested

public void writeRequested(ChannelHandlerContext ctx,
                  MessageEvent e)
                    throws java.lang.Exception

Invoked when Channel.write(Object) is called.

抛出:

java.lang.Exception

bindRequested

public void bindRequested(ChannelHandlerContext ctx,
                 ChannelStateEvent e)
                   throws java.lang.Exception

Invoked when Channel.bind(SocketAddress) was called.

抛出:

java.lang.Exception

connectRequested

public void connectRequested(ChannelHandlerContext ctx,
                    ChannelStateEvent e)
                      throws java.lang.Exception

Invoked when Channel.connect(SocketAddress) was called.

抛出:

java.lang.Exception

setInterestOpsRequested

public void setInterestOpsRequested(ChannelHandlerContext ctx,
                           ChannelStateEvent e)
                             throws java.lang.Exception

Invoked when Channel.setInterestOps(int) was called.

抛出:

java.lang.Exception

disconnectRequested

public void disconnectRequested(ChannelHandlerContext ctx,
                       ChannelStateEvent e)
                         throws java.lang.Exception

Invoked when Channel.disconnect() was called.

抛出:

java.lang.Exception

unbindRequested

public void unbindRequested(ChannelHandlerContext ctx,
                   ChannelStateEvent e)
                     throws java.lang.Exception

Invoked when Channel.unbind() was called.

抛出:

java.lang.Exception

closeRequested

public void closeRequested(ChannelHandlerContext ctx,
                  ChannelStateEvent e)
                    throws java.lang.Exception

Invoked when Channel.close() was called.

抛出:

java.lang.Exception