/*
* Copyright 2012 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 com.github.nettybook.ch1;
import java.nio.charset.Charset;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
/**
* 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 {
@Override
public void channelActive(ChannelHandlerContext ctx) {
String sendMessage = "Hello netty";
ByteBuf messageBuffer = Unpooled.buffer();
messageBuffer.writeBytes(sendMessage.getBytes());
StringBuilder builder = new StringBuilder();
builder.append("전송한 문자열 [");
builder.append(sendMessage);
builder.append("]");
System.out.println(builder.toString());
ctx.writeAndFlush(messageBuffer);
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
String readMessage = ((ByteBuf) msg).toString(Charset.defaultCharset());
StringBuilder builder = new StringBuilder();
builder.append("수신한 문자열 [");
builder.append(readMessage);
builder.append("]");
System.out.println(builder.toString());
}
@Override
public void channelReadComplete(ChannelHandlerContext ctx) {
ctx.close();
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
cause.printStackTrace();
ctx.close();
}
}