/*
* Copyright 2013-2018 Lilinfeng.
*
* Licensed 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.phei.netty.protocol.udp;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.socket.DatagramPacket;
import io.netty.util.CharsetUtil;
import io.netty.util.internal.ThreadLocalRandom;
/**
* @author lilinfeng
* @date 2014年2月14日
* @version 1.0
*/
public class ChineseProverbServerHandler extends
SimpleChannelInboundHandler<DatagramPacket> {
// 谚语列表
private static final String[] DICTIONARY = { "只要功夫深,铁棒磨成针。",
"旧时王谢堂前燕,飞入寻常百姓家。", "洛阳亲友如相问,一片冰心在玉壶。", "一寸光阴一寸金,寸金难买寸光阴。",
"老骥伏枥,志在千里。烈士暮年,壮心不已!" };
private String nextQuote() {
int quoteId = ThreadLocalRandom.current().nextInt(DICTIONARY.length);
return DICTIONARY[quoteId];
}
@Override
public void messageReceived(ChannelHandlerContext ctx, DatagramPacket packet)
throws Exception {
String req = packet.content().toString(CharsetUtil.UTF_8);
System.out.println(req);
if ("谚语字典查询?".equals(req)) {
ctx.writeAndFlush(new DatagramPacket(Unpooled.copiedBuffer(
"谚语查询结果: " + nextQuote(), CharsetUtil.UTF_8), packet
.sender()));
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
throws Exception {
ctx.close();
cause.printStackTrace();
}
}