玩转Netty – 从Netty3升级到Netty4

ChannelPipeline cp = Channels.pipeline();

ChannelPipeline cp = ch.pipeline();

 public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent e)
            throws Exception
    {
        if (e instanceof ChannelStateEvent) {
            ChannelStateEvent cse = (ChannelStateEvent) e;
            switch (cse.getState()) {
                case OPEN:
                    if (Boolean.TRUE.equals(cse.getValue())) {
                        // connect
                        channelCount.incrementAndGet();
                        allChannels.add(e.getChannel());
                    }
                    else {
                        // disconnect
                        channelCount.decrementAndGet();
                        allChannels.remove(e.getChannel());
                    }
                    break;
                case BOUND:
                    break;
            }
        }


        if (e instanceof UpstreamMessageEvent) {
            UpstreamMessageEvent ume = (UpstreamMessageEvent) e;
            if (ume.getMessage() instanceof ChannelBuffer) {
                ChannelBuffer cb = (ChannelBuffer) ume.getMessage();
                int readableBytes = cb.readableBytes();
                //  compute stats here, bytes read from remote
                bytesRead.getAndAdd(readableBytes);
            }
        }
        ctx.sendUpstream(e);
    }


    public void handleDownstream(ChannelHandlerContext ctx, ChannelEvent e)
            throws Exception
    {
        if (e instanceof DownstreamMessageEvent) {
            DownstreamMessageEvent dme = (DownstreamMessageEvent) e;
            if (dme.getMessage() instanceof ChannelBuffer) {
                ChannelBuffer cb = (ChannelBuffer) dme.getMessage();
                int readableBytes = cb.readableBytes();
                // compute stats here, bytes written to remote
                bytesWritten.getAndAdd(readableBytes);
            }
        }
        ctx.sendDownstream(e);
    }

       ctx.channel().setReadable(false);//Before
       ctx.channel().config().setAutoRead(false);//After

      // Before:
      cfg.setOption("tcpNoDelay", true);
　　　cfg.setOption("tcpNoDelay", 0);  // Runtime ClassCastException
　　　cfg.setOption("tcpNoDelays", true); // Typo in the option name - ignored silently

　　　// After:
　　　cfg.setOption(ChannelOption.TCP_NODELAY, true);
　　　cfg.setOption(ChannelOption.TCP_NODELAY, 0); // Compile error

        @Test
    　　public void testMultipleLinesStrippedDelimiters() {
        　　EmbeddedChannel ch = new EmbeddedChannel(new DelimiterBasedFrameDecoder(8192, true,
                Delimiters.lineDelimiter()));
        　　ch.writeInbound(Unpooled.copiedBuffer("TestLine\r\ng\r\n", Charset.defaultCharset()));
        　　assertEquals("TestLine", releaseLater((ByteBuf) ch.readInbound()).toString(Charset.defaultCharset()));
        　　assertEquals("g", releaseLater((ByteBuf) ch.readInbound()).toString(Charset.defaultCharset()));
        　　assertNull(ch.readInbound());
        　　ch.finish();
   　　 }

 if (serverChannel != null) {
            log.info("stopping transport {}:{}",getName(), port);
            // first stop accepting
            final CountDownLatch latch = new CountDownLatch(1);
            serverChannel.close().addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    // stop and process remaining in-flight invocations
                    if (def.getExecutor() instanceof ExecutorService) {
                        ExecutorService exe = (ExecutorService) getExecutor();
                        ShutdownUtil.shutdownExecutor(exe, "dispatcher");
                    }
                    latch.countDown();
                }
            });
            latch.await();
            serverChannel = null;
        }

        // If the channelFactory was created by us, we should also clean it up. If the
        // channelFactory was passed in by Bootstrap, then it may be shared so don't clean  it up.
        if (channelFactory != null) {
            ShutdownUtil.shutdownChannelFactory(channelFactory, bossExecutor, ioWorkerExecutor,allChannels);
            }
}

 public void stop() throws InterruptedException {
        // Wait until the server socket is closed.
        channelFuture.channel().closeFuture().syncUninterruptibly();
        
        bossGroup.shutdownGracefully().syncUninterruptibly();
        workerGroup.shutdownGracefully().syncUninterruptibly();
    }

　cp.addLast("idleTimeoutHandler", new IdleStateHandler(getTimer(),
                                                                          getClientIdleTimeout().toMillis(),
                                                                          NO_WRITER_IDLE_TIMEOUT,
                                                                          NO_ALL_IDLE_TIMEOUT,
                                                                          TimeUnit.MILLISECONDS));
 　cp.addLast("heartbeatHandler", new HeartbeatHandler());

  　cp.addLast("idleTimeoutHandler", new IdleStateHandler(
                                NO_WRITER_IDLE_TIMEOUT, NO_WRITER_IDLE_TIMEOUT,
                                NO_ALL_IDLE_TIMEOUT, TimeUnit.MILLISECONDS));

　　cp.addLast("heartbeatHandler", new HeartbeatHandler());

参考文档