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    
020    package org.crsh.telnet;
021    
022    import org.crsh.plugin.*;
023    import org.crsh.telnet.term.TelnetLifeCycle;
024    import org.crsh.vfs.Resource;
025    
026    import java.io.IOException;
027    import java.net.URL;
028    import java.util.Collections;
029    import java.util.logging.Level;
030    
031    public 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    }