Examples of ChannelHandlerContext

• com.facebook.presto.jdbc.internal.netty.channel.ChannelHandlerContext
  handler will receive a sequence of increasing integers starting // from 1. {@code @Override}public void messageReceived( {@link ChannelHandlerContext} ctx, {@link MessageEvent} evt) {Integer a = (Integer) ctx.getAttachment(); Integer b = (Integer) evt.getMessage(); if (a == null) { a = 1; } ctx.setAttachment(Integer.valueOf(a * b)); } } // Different context objects are given to "f1", "f2", "f3", and "f4" even if // they refer to the same handler instance. Because the FactorialHandler // stores its state in a context object (as an attachment), the factorial is // calculated correctly 4 times once the two pipelines (p1 and p2) are active. FactorialHandler fh = new FactorialHandler(); {@link ChannelPipeline} p1 = {@link Channels}.pipeline(); p1.addLast("f1", fh); p1.addLast("f2", fh); {@link ChannelPipeline} p2 = {@link Channels}.pipeline(); p2.addLast("f3", fh); p2.addLast("f4", fh);

  Additional resources worth reading

  Please refer to the {@link ChannelHandler}, {@link ChannelEvent}, and {@link ChannelPipeline} to find out what a upstream event and a downstreamevent are, what fundamental differences they have, how they flow in a pipeline, and how to handle the event in your application. @apiviz.owns com.facebook.presto.jdbc.internal.netty.channel.ChannelHandler

• io.netty.channel.ChannelHandlerContext
  handler will receive a sequence of increasing integers starting // from 1. {@code @Override}public void messageReceived( {@link ChannelHandlerContext} ctx, {@link Integer} integer) {{@link Attribute}< {@link Integer}> attr = ctx.getAttr(counter); Integer a = ctx.getAttr(counter).get(); if (a == null) { a = 1; } attr.set(a * integer)); } } // Different context objects are given to "f1", "f2", "f3", and "f4" even if // they refer to the same handler instance. Because the FactorialHandler // stores its state in a context object (as an attachment), the factorial is // calculated correctly 4 times once the two pipelines (p1 and p2) are active. FactorialHandler fh = new FactorialHandler(); {@link ChannelPipeline} p1 = {@link Channels}.pipeline(); p1.addLast("f1", fh); p1.addLast("f2", fh); {@link ChannelPipeline} p2 = {@link Channels}.pipeline(); p2.addLast("f3", fh); p2.addLast("f4", fh);

  Additional resources worth reading

  Please refer to the {@link ChannelHandler}, and {@link ChannelPipeline} to find out more about inbound and outbound operations,what fundamental differences they have, how they flow in a pipeline, and how to handle the operation in your application.

• net.gleamynode.netty.channel.ChannelHandlerContext
  @author The Netty Project (netty@googlegroups.com) @author Trustin Lee (trustin@gmail.com) @version $Rev: 479 $, $Date: 2008-07-04 16:04:47 +0900 (Fri, 04 Jul 2008) $ @apiviz.hidden @apiviz.owns net.gleamynode.netty.channel.ChannelHandler
• org.jboss.netty.channel.ChannelHandlerContext
  Provides the properties and operations which are specific to the {@link ChannelHandler} and the {@link ChannelPipeline} it belongs to.Via a {@link ChannelHandlerContext}, a {@link ChannelHandler} can sendan upstream or downstream {@link ChannelEvent} to the next or previous{@link ChannelHandler} in the {@link ChannelPipeline}.

   +---------+ 1 .. 1 +----------------+ 1 .. n +----------+ 1 .. 1 +---------+ | Handler |------->| HandlerContext |------->| Pipeline |------->| Channel | +---------+        +----------------+        +----------+        +---------+ 

  @author The Netty Project (netty-dev@lists.jboss.org) @author Trustin Lee (tlee@redhat.com) @version $Rev: 1010 $, $Date: 2009-03-11 19:53:52 +0900 (Wed, 11 Mar 2009) $ @apiviz.owns org.jboss.netty.channel.ChannelHandler

Examples of org.jboss.netty.channel.ChannelHandlerContext