//
//  ========================================================================
//  Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package application;

import java.io.File;
import java.util.Optional;

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.webapp.Configuration;
import org.eclipse.jetty.webapp.WebAppContext;

// 
// Find more information on web application with embedded Jetty examples at:
// https://www.eclipse.org/jetty/documentation/9.2.10.v20150310/embedded-examples.html
//
public class Main
{
    public static final Optional<String> PORT = Optional.ofNullable(System.getenv("PORT"));
    public static final Optional<String> HOSTNAME = Optional.ofNullable(System.getenv("HOSTNAME"));
    public static void main( String[] args ) throws Exception
    {
        // Create a basic jetty server object that will listen on port 8080.
        // Note that if you set this to port 0 then
        // a randomly available port will be assigned that you can either look
        // in the logs for the port,
        // or programmatically obtain it for use in test cases.
        int port = Integer.valueOf(PORT.orElse("8080"));
        String host = HOSTNAME.orElse("localhost");
        System.out.println("Jetty server running on http://" + host +":" + port );
        Server server = new Server( port );

        // The WebAppContext is the entity that controls the environment in
        // which a web application lives and
        // breathes. In this example the context path is being set to "/" so it
        // is suitable for serving root context
        // requests and then we see it setting the location of the war. A whole
        // host of other configurations are
        // available, ranging from configuring to support annotation scanning in
        // the webapp (through
        // PlusConfiguration) to choosing where the webapp will unpack itself.
        WebAppContext webapp = new WebAppContext();
        webapp.setContextPath( "/" );
        File warFile = new File("webapp" );
        if (!warFile.exists())
        {
            throw new RuntimeException( "Unable to find WAR File: "
                    + warFile.getAbsolutePath() );        }
        webapp.setWar( warFile.getAbsolutePath() );
        // This webapp will use jsps and jstl. We need to enable the
        // AnnotationConfiguration in order to correctly
        // set up the jsp container
        Configuration.ClassList classlist = Configuration.ClassList
                .setServerDefault( server );
        classlist.addBefore(
                "org.eclipse.jetty.webapp.JettyWebXmlConfiguration" ,
                "org.eclipse.jetty.annotations.AnnotationConfiguration" );

        // Set the ContainerIncludeJarPattern so that jetty examines these
        // container-path jars for tlds, web-fragments etc.
        // If you omit the jar that contains the jstl .tlds, the jsp engine will
        // scan for them instead.
        webapp.setAttribute(
                "org.eclipse.jetty.server.webapp.ContainerIncludeJarPattern",
                ".*/[^/]*servlet-api-[^/]*\\.jar$|.*/javax.servlet.jsp.jstl-.*\\.jar$|.*/[^/]*taglibs.*\\.jar$" );

        // A WebAppContext is a ContextHandler as well so it needs to be set to
        // the server so it is aware of where to
        // send the appropriate requests.
        server.setHandler( webapp );

         // Start things up! 
        server.start();

        // The use of server.join() the will make the current thread join and
        // wait until the server is done executing.
        // See http://docs.oracle.com/javase/7/docs/api/java/lang/Thread.html#join()
        server.join();
    }
}
