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    
030    public class TelnetPlugin extends CRaSHPlugin<TelnetPlugin> {
031    
032      /** . */
033      public static final PropertyDescriptor<Integer> TELNET_PORT = PropertyDescriptor.create("telnet.port", 5000, "The telnet port");
034    
035      /** . */
036      private TelnetLifeCycle lifeCycle;
037    
038      @Override
039      public TelnetPlugin getImplementation() {
040        return this;
041      }
042    
043      @Override
044      protected Iterable<PropertyDescriptor<?>> createConfigurationCapabilities() {
045        return Collections.<PropertyDescriptor<?>>singletonList(TELNET_PORT);
046      }
047    
048      @Override
049      public void init() {
050        PluginContext context = getContext();
051    
052        //
053        Resource config = null;
054    
055        //
056        URL configURL = TelnetPlugin.class.getResource("telnet.properties");
057        if (configURL != null) {
058          try {
059            log.debug("Found embedded telnet config url " + configURL);
060            config = new Resource(configURL);
061          }
062          catch (IOException e) {
063            log.debug("Could not load embedded telnet config url " + configURL + " will bypass it", e);
064          }
065        }
066    
067        // Override from config if any
068        Resource res = getContext().loadResource("telnet.properties", ResourceKind.CONFIG);
069        if (res != null) {
070          config = res;
071          log.debug("Found telnet config url " + configURL);
072        }
073    
074        //
075        if (configURL == null) {
076          log.info("Could not boot Telnet due to missing config");
077          return;
078        }
079    
080        //
081        TelnetLifeCycle lifeCycle = new TelnetLifeCycle(context);
082        lifeCycle.setConfig(config);
083        Integer port = context.getProperty(TELNET_PORT);
084        if (port != null) {
085          lifeCycle.setPort(port);
086        }
087    
088        //
089        lifeCycle.init();
090    
091        //
092        this.lifeCycle = lifeCycle;
093      }
094    
095      @Override
096      public void destroy() {
097        if (lifeCycle != null) {
098          lifeCycle.destroy();
099        }
100      }
101    }