001/*
002 * Copyright (C) 2012 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019
020package org.crsh.telnet;
021
022import org.crsh.plugin.*;
023import org.crsh.telnet.term.TelnetLifeCycle;
024import org.crsh.vfs.Resource;
025
026import java.io.IOException;
027import java.net.URL;
028import java.util.Collections;
029import java.util.logging.Level;
030
031public class TelnetPlugin extends CRaSHPlugin<TelnetPlugin> {
032
033  /** . */
034  public static final PropertyDescriptor<Integer> TELNET_PORT = PropertyDescriptor.create("telnet.port", 5000, "The telnet port");
035
036  /** . */
037  private TelnetLifeCycle lifeCycle;
038
039  @Override
040  public TelnetPlugin getImplementation() {
041    return this;
042  }
043
044  @Override
045  protected Iterable<PropertyDescriptor<?>> createConfigurationCapabilities() {
046    return Collections.<PropertyDescriptor<?>>singletonList(TELNET_PORT);
047  }
048
049  @Override
050  public void init() {
051    PluginContext context = getContext();
052
053    //
054    Resource config = null;
055
056    //
057    URL configURL = TelnetPlugin.class.getResource("/crash/telnet.properties");
058    if (configURL != null) {
059      try {
060        log.log(Level.FINE, "Found embedded telnet config url " + configURL);
061        config = new Resource("telnet.properties", configURL);
062      }
063      catch (IOException e) {
064        log.log(Level.FINE, "Could not load embedded telnet config url " + configURL + " will bypass it", e);
065      }
066    }
067
068    // Override from config if any
069    Resource res = getContext().loadResource("telnet.properties", ResourceKind.CONFIG);
070    if (res != null) {
071      config = res;
072      log.log(Level.FINE, "Found telnet config url " + configURL);
073    }
074
075    //
076    if (configURL == null) {
077      log.log(Level.INFO, "Could not boot Telnet due to missing config");
078      return;
079    }
080
081    //
082    TelnetLifeCycle lifeCycle = new TelnetLifeCycle(context);
083    lifeCycle.setConfig(config);
084    Integer port = context.getProperty(TELNET_PORT);
085    if (port == null) {
086      port = TELNET_PORT.defaultValue;
087    }
088    lifeCycle.setPort(port);
089
090    //
091    lifeCycle.init();
092
093    //
094    this.lifeCycle = lifeCycle;
095  }
096
097  @Override
098  public void destroy() {
099    if (lifeCycle != null) {
100      lifeCycle.destroy();
101    }
102  }
103}