/**

  * Copyright 2009 Martin Vysny.

  *

  * This file is part of WebVM.

  *

  * WebVM is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, either version 3 of the License, or

  * (at your option) any later version.

  *

  * WebVM is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with WebVM.  If not, see <http://www.gnu.org/licenses/>.

  */

 package sk.baka.webvm;

 import java.net.Inet4Address;

 import java.net.InetAddress;

 import java.net.NetworkInterface;

 import java.util.Collections;

 import java.util.Properties;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import javax.naming.Context;

 import org.apache.wicket.markup.html.basic.Label;

 import sk.baka.tools.javaee.JeeServer;

 /**

  * Shows an information about an application server: the connection strings, Hibernate configuration etc.

  * @author Martin Vysny

  */

 public class AppServer extends WebVMPage {

     public AppServer(final JeeServer server) {

         super();

         border.add(new Label("appServerName", server.getServerName()));

         border.add(new Label("sampleCodeRemoteEjb", getSampleCodeRemoteEjb(server)));

         border.add(new Label("userTransactionJndi", nullable(server.getUserTransactionJndi())));

         String tm = null;

         try {

             tm = nullable(server.getTransactionManagerJndi());

         } catch (Exception e) {

             tm = e.toString();

         }

         border.add(new Label("transactionManagerJndi", tm));

         border.add(new Label("managerLookupClass", nullable(server.getHibernateTransactionManagerFactory())));

     }

     private static String nullable(final String str) {

         return str == null ? "unknown" : str;

     }

     private String getSampleCodeRemoteEjb(final JeeServer server) {

         final StringBuilder sb = new StringBuilder();

         sb.append("final Properties p = new Properties();\n");

         final Properties p = server.getJNDIProperties(false);

         p.put(Context.PROVIDER_URL, server.getRemoteURL(getMyIp(), null));

         for (Object key : p.keySet()) {

             sb.append("p.put(\"");

             sb.append(key);

             sb.append("\", \"");

             sb.append(p.get(key));

             sb.append("\");\n");

         }

         sb.append("final Context c = new InitialContext(p);");

         return sb.toString();

     }

     /**

      * Retrieves an IP address of this machine. Returns localhost if the address couldn't be retrieved.

      * @return this machine IP address.

      */

     private static String getMyIp() {

         try {

             for (final NetworkInterface iface : Collections.list(NetworkInterface.getNetworkInterfaces())) {

                 for (final InetAddress ia : Collections.list(iface.getInetAddresses())) {

                     // searching for IPV4 non-localhost address

                     if (ia instanceof Inet4Address && ia.getAddress()[0] != 127) {

                         return HomePage.getIP(ia);

                     }

                 }

             }

         } catch (Exception ex) {

             log.log(Level.WARNING, "Failed to detect IP address of this machine", ex);

         }

         return "127.0.0.1";

     }

     private final static Logger log = Logger.getLogger(AppServer.class.getName());

 }