001    /*
002     * Copyright (C) 2010 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.concurrent;
021    
022    import org.crsh.shell.ShellProcess;
023    import org.crsh.shell.ShellProcessContext;
024    import org.crsh.shell.ShellResponse;
025    
026    import java.util.concurrent.CountDownLatch;
027    
028    /**
029     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
030     * @version $Revision$
031     */
032    public class SyncShellResponseContext implements ShellProcessContext {
033    
034      /** . */
035      private final ShellProcessContext wrapped;
036    
037      /** . */
038      private ShellResponse response;
039    
040      /** . */
041      private final CountDownLatch latch;
042    
043      /** . */
044      private ShellProcess process;
045    
046      public SyncShellResponseContext() {
047        this(null);
048      }
049    
050      public SyncShellResponseContext(ShellProcessContext wrapped) {
051        this.wrapped = wrapped;
052        this.latch = new CountDownLatch(1);
053        this.response = null;
054      }
055    
056    /*
057      public void cancel() {
058        throw new UnsupportedOperationException();
059      }
060    
061    */
062      public int getWidth() {
063        return wrapped.getWidth();
064      }
065    
066      public String getProperty(String name) {
067        return wrapped.getProperty(name);
068      }
069    
070      public String readLine(String msg, boolean echo) {
071        if (wrapped != null) {
072          return wrapped.readLine(msg, echo);
073        } else {
074          return null;
075        }
076      }
077    
078      public void end(ShellResponse response) {
079        this.response = response;
080        this.latch.countDown();
081    
082        //
083        if (wrapped != null) {
084          wrapped.end(response);
085        }
086      }
087    
088      public ShellResponse getResponse() throws InterruptedException {
089        latch.await();
090        return response;
091      }
092    }