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.shell.impl.remoting;
021    
022    import org.crsh.shell.ShellProcess;
023    import org.crsh.shell.ShellProcessContext;
024    
025    public class ServerProcess implements ShellProcess {
026    
027      /** . */
028      final ServerAutomaton server;
029    
030      /** . */
031      final String line;
032    
033      /** . */
034      private int status;
035    
036      ServerProcess(ServerAutomaton server, String line) {
037        this.server = server;
038        this.line = line;
039        this.status = 0;
040      }
041    
042      public void execute(ShellProcessContext processContext) throws IllegalStateException {
043        if (status != 0) {
044          throw new IllegalStateException();
045        }
046        status = 1;
047        try {
048          server.execute(this, processContext);
049        }
050        finally {
051          status = 2;
052        }
053      }
054    
055      public void cancel() {
056        switch (status) {
057          case 0:
058            throw new IllegalStateException();
059          case 1:
060            server.cancel(this);
061            break;
062        }
063      }
064    }