com.khs.microservice.whirlpool.whirlpoolserver.WhirlpoolServer.java Source code

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Here is the source code for com.khs.microservice.whirlpool.whirlpoolserver.WhirlpoolServer.java

Source

package com.khs.microservice.whirlpool.whirlpoolserver;

/*
 * 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.
 */

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpRequestDecoder;
import io.netty.handler.codec.http.HttpResponseEncoder;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.util.CharsetUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Server that accept the path of a file an echo back its content.
 */
public final class WhirlpoolServer {
    private static final Logger logger = LoggerFactory.getLogger(WhirlpoolServer.class);
    private static final int PORT = Integer.parseInt(System.getProperty("port", "8080"));

    public static void main(String[] args) throws Exception {
        // Configure the server.
        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
                    .handler(new LoggingHandler(LogLevel.INFO))
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch) throws Exception {
                            ChannelPipeline p = ch.pipeline();
                            p.addLast("encoder", new HttpResponseEncoder());
                            p.addLast("decoder", new HttpRequestDecoder());
                            p.addLast("stringDecoder", new StringDecoder(CharsetUtil.UTF_8));
                            p.addLast("stringEncoder", new StringEncoder(CharsetUtil.UTF_8));
                            p.addLast("aggregator", new HttpObjectAggregator(65536));
                            p.addLast("handler", new WhirlpoolServerHandler());
                        }
                    });

            // Start the server.
            ChannelFuture f = b.bind(PORT).sync();
            logger.info("Whirlpool Server started");

            // Wait until the server socket is closed.
            f.channel().closeFuture().sync();
        } finally {
            logger.info("Whirlpool Server shutdown started");
            // Shut down all event loops to terminate all threads.
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
            logger.info("Whirlpool Server shutdown completed");
        }
    }
}