ExtractorServer.java

/*
 * 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.stratio.deep.commons.extractor.server;

import java.security.cert.CertificateException;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import javax.net.ssl.SSLException;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.util.SelfSignedCertificate;

/**
 * The extractor server.
 */
public final class ExtractorServer {

    static final boolean SSL = System.getProperty("ssl") != null;
    static final int PORT = Integer.parseInt(System.getProperty("port", "8463"));

    private static EventLoopGroup workerGroup;
    private static EventLoopGroup bossGroup;

    public static void main(String[] args) throws Exception {

        try {
            start();

        } finally {
            close();
        }
    }

    public static void start() throws CertificateException, SSLException, InterruptedException {
        // Configure SSL.
        final SslContext sslCtx;
        if (SSL) {
            SelfSignedCertificate ssc = new SelfSignedCertificate();
            sslCtx = SslContext.newServerContext(ssc.certificate(), ssc.privateKey());
        } else {
            sslCtx = null;
        }

        bossGroup = new NioEventLoopGroup(1);
        workerGroup = new NioEventLoopGroup();

        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .handler(new LoggingHandler(LogLevel.INFO))
                .childHandler(new ExtractorServerInitializer(sslCtx));

        b.bind(PORT).sync().channel().closeFuture().sync();
    }

    public static void close() {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }

    public static void initExtractorServer() {
        ExecutorService es = Executors.newFixedThreadPool(1);
        final Future future = es.submit(new Callable() {
            public Object call() throws Exception {
                start();
                return null;
            }
        });
    }

    public static void stopExtractorServer() {
        close();
    }
}