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Play! Framework
There is a newer version: 1.5.0
package play.server;

import java.io.File;
import java.lang.management.ManagementFactory;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.Properties;
import java.util.concurrent.Executors;

import org.jboss.netty.bootstrap.ServerBootstrap;
import org.jboss.netty.channel.ChannelException;
import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory;

import play.Logger;
import play.Play;
import play.Play.Mode;
import play.libs.IO;
import play.server.ssl.SslHttpServerPipelineFactory;
import play.vfs.VirtualFile;

public class Server {

    public static int httpPort;
    public static int httpsPort;

    public final static String PID_FILE = "server.pid";

    public Server(String[] args) {

        System.setProperty("file.encoding", "utf-8");
        final Properties p = Play.configuration;

        httpPort = Integer.parseInt(getOpt(args, "http.port", p.getProperty("http.port", "-1")));
        httpsPort = Integer.parseInt(getOpt(args, "https.port", p.getProperty("https.port", "-1")));

        if (httpPort == -1 && httpsPort == -1) {
            httpPort = 9000;
        }

        if (httpPort == httpsPort) {
            Logger.error("Could not bind on https and http on the same port " + httpPort);
            Play.fatalServerErrorOccurred();
        }

        InetAddress address = null;
        InetAddress secureAddress = null;
        try {
            if (p.getProperty("http.address") != null) {
                address = InetAddress.getByName(p.getProperty("http.address"));
            } else if (System.getProperties().containsKey("http.address")) {
                address = InetAddress.getByName(System.getProperty("http.address"));
            }

        } catch (Exception e) {
            Logger.error(e, "Could not understand http.address");
            Play.fatalServerErrorOccurred();
        }
        try {
            if (p.getProperty("https.address") != null) {
                secureAddress = InetAddress.getByName(p.getProperty("https.address"));
            } else if (System.getProperties().containsKey("https.address")) {
                secureAddress = InetAddress.getByName(System.getProperty("https.address"));
            }
        } catch (Exception e) {
            Logger.error(e, "Could not understand https.address");
            Play.fatalServerErrorOccurred();
        }
        ServerBootstrap bootstrap = new ServerBootstrap(new NioServerSocketChannelFactory(
                Executors.newCachedThreadPool(), Executors.newCachedThreadPool())
        );
        try {
            if (httpPort != -1) {
                bootstrap.setPipelineFactory(new HttpServerPipelineFactory());

                bootstrap.bind(new InetSocketAddress(address, httpPort));
                bootstrap.setOption("child.tcpNoDelay", true);

                if (Play.mode == Mode.DEV) {
                    if (address == null) {
                        Logger.info("Listening for HTTP on port %s (Waiting a first request to start) ...", httpPort);
                    } else {
                        Logger.info("Listening for HTTP at %2$s:%1$s (Waiting a first request to start) ...", httpPort, address);
                    }
                } else {
                    if (address == null) {
                        Logger.info("Listening for HTTP on port %s ...", httpPort);
                    } else {
                        Logger.info("Listening for HTTP at %2$s:%1$s  ...", httpPort, address);
                    }
                }

            }

        } catch (ChannelException e) {
            Logger.error("Could not bind on port " + httpPort, e);
            Play.fatalServerErrorOccurred();
        }

        bootstrap = new ServerBootstrap(new NioServerSocketChannelFactory(
                Executors.newCachedThreadPool(), Executors.newCachedThreadPool())
        );

        try {
            if (httpsPort != -1) {
                bootstrap.setPipelineFactory(new SslHttpServerPipelineFactory());
                bootstrap.bind(new InetSocketAddress(secureAddress, httpsPort));
                bootstrap.setOption("child.tcpNoDelay", true);

                if (Play.mode == Mode.DEV) {
                    if (secureAddress == null) {
                        Logger.info("Listening for HTTPS on port %s (Waiting a first request to start) ...", httpsPort);
                    } else {
                        Logger.info("Listening for HTTPS at %2$s:%1$s (Waiting a first request to start) ...", httpsPort, secureAddress);
                    }
                } else {
                    if (secureAddress == null) {
                        Logger.info("Listening for HTTPS on port %s ...", httpsPort);
                    } else {
                        Logger.info("Listening for HTTPS at %2$s:%1$s  ...", httpsPort, secureAddress);
                    }
                }

            }

        } catch (ChannelException e) {
            Logger.error("Could not bind on port " + httpsPort, e);
            Play.fatalServerErrorOccurred();
        }

    }

    private String getOpt(String[] args, String arg, String defaultValue) {
        String s = "--" + arg + "=";
        for (String a : args) {
            if (a.startsWith(s)) {
                return a.substring(s.length());
            }
        }
        return defaultValue; 
    }

    private static void writePID(File root) {
        String pid = ManagementFactory.getRuntimeMXBean().getName().split("@")[0];
        File pidfile = new File(root, PID_FILE);
        if (pidfile.exists()) {
            throw new RuntimeException("The " + PID_FILE + " already exists. Is the server already running?");
        }
        IO.write(pid.getBytes(), pidfile);
    }

    public static void main(String[] args) throws Exception {
        File root = new File(System.getProperty("application.path"));
        if (System.getProperty("precompiled", "false").equals("true")) {
            Play.usePrecompiled = true;
        }
        if (System.getProperty("writepid", "false").equals("true")) {
            writePID(root);
        }
        Play.init(root, System.getProperty("play.id", ""));
        if (System.getProperty("precompile") == null) {
            new Server(args);
        } else {
            Logger.info("Done.");
        }
    }

}