/*
 * Copyright 2011 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.example.echo;

import io.netty.buffer.ChannelBuffer;
import io.netty.buffer.ChannelBuffers;
import io.netty.channel.ChannelBufferHolder;
import io.netty.channel.ChannelBufferHolders;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInboundHandlerContext;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Handler implementation for the echo client.  It initiates the ping-pong
 * traffic between the echo client and server by sending the first message to
 * the server.
 */
public class EchoClientHandler extends ChannelInboundHandlerAdapter<Byte> {

    private static final Logger logger = Logger.getLogger(
            EchoClientHandler.class.getName());

    private final ChannelBuffer firstMessage;

    /**
     * Creates a client-side handler.
     */
    public EchoClientHandler(int firstMessageSize) {
        if (firstMessageSize <= 0) {
            throw new IllegalArgumentException("firstMessageSize: " + firstMessageSize);
        }
        firstMessage = ChannelBuffers.buffer(firstMessageSize);
        for (int i = 0; i < firstMessage.capacity(); i ++) {
            firstMessage.writeByte((byte) i);
        }
    }

    @Override
    public ChannelBufferHolder<Byte> newInboundBuffer(ChannelInboundHandlerContext<Byte> ctx) {
        return ChannelBufferHolders.byteBuffer();
    }

    @Override
    public void channelActive(ChannelInboundHandlerContext<Byte> ctx) {
        ctx.write(firstMessage);
    }

    @Override
    public void inboundBufferUpdated(ChannelInboundHandlerContext<Byte> ctx) {
        ChannelBuffer in = ctx.inbound().byteBuffer();
        ChannelBuffer out = ctx.nextOutboundByteBuffer();
        out.discardReadBytes();
        out.writeBytes(in);
        in.discardReadBytes();
        ctx.flush();
    }

    @Override
    public void exceptionCaught(
            ChannelInboundHandlerContext<Byte> ctx, Throwable cause) {
        // Close the connection when an exception is raised.
        logger.log(Level.WARNING, "Unexpected exception from downstream.", cause);
        ctx.close();
    }
}

@@ -739,99 +739,8 @@
 rs;%0A
-import io.netty.channel.ChannelBufferHolder;%0Aimport io.netty.channel.ChannelBufferHolders;%0A
 impo
@@ -780,23 +780,23 @@
 dHandler
-Adapter
+Context
 ;%0Aimport
@@ -827,30 +827,36 @@
 lInbound
+Stream
 Handler
-Context
+Adapter
 ;%0A%0Aimpor
@@ -1141,24 +1141,30 @@
 annelInbound
+Stream
 HandlerAdapt
@@ -1165,22 +1165,16 @@
 rAdapter
-%3CByte%3E
  %7B%0A%0A    
@@ -1759,175 +1759,8 @@
  %7D%0A%0A
-    @Override%0A    public ChannelBufferHolder%3CByte%3E newInboundBuffer(ChannelInboundHandlerContext%3CByte%3E ctx) %7B%0A        return ChannelBufferHolders.byteBuffer();%0A    %7D%0A%0A
     
@@ -1970,27 +1970,17 @@
 yte%3E ctx
-) %7B%0A       
+,
  Channel
@@ -1992,38 +1992,11 @@
 r in
- = ctx.inbound().byteBuffer();
+) %7B
 %0A   
@@ -2114,39 +2114,8 @@
 n);%0A
-        in.discardReadBytes();%0A
     

Use ChannelInboundStreamHandlerAdapter in EchoClientHandler