org.fengbaoxp.netty.official.TimeServerHandler.java Source code

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Here is the source code for org.fengbaoxp.netty.official.TimeServerHandler.java

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/*
 * Copyright 2012-2012 the original author or authors.
 *
 * 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 org.fengbaoxp.netty.official;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.ReferenceCountUtil;

/**
 * @author Eugene Wang
 * @since 0.0.1
 */
@ChannelHandler.Sharable
public class TimeServerHandler extends ChannelHandlerAdapter {

    private static Logger logger = LoggerFactory.getLogger(TimeServerHandler.class);

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        final ByteBuf time = ctx.alloc().buffer(4);
        time.writeInt((int) (System.currentTimeMillis() / 1000L + 2208988800L));

        final ChannelFuture f = ctx.writeAndFlush(time);
        f.addListener((future) -> {
            assert f == future;
            ctx.close();
        });
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}