Package org.jboss.services.deployment

Source Code of org.jboss.services.deployment.LibraryManager

/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.services.deployment;

import java.io.File;
import java.io.IOException;
import java.net.URISyntaxException;
import java.net.URL;

import org.jboss.bootstrap.api.as.config.JBossASServerConfig;
import org.jboss.logging.Logger;
import org.jboss.system.server.ServerConfigLocator;
import org.jboss.util.file.Files;

/**
* Simple helper singleton to manage library operations
*
* @author  <a href="mailto:dimitris@jboss.org">Dimitris Andreadis</a>
* @version $Revision: 97479 $
*/
public final class LibraryManager
{
   // Static --------------------------------------------------------
  
   /** the Logger instance */
   private static final Logger log = Logger.getLogger(LibraryManager.class);
  
   /** the singleton instance */
   private static final LibraryManager INSTANCE = new LibraryManager();
  
   // Private Data --------------------------------------------------
  
   /** The local server library dir */
   File serverLibDir;
  
   /** The local server tmp dir */
   File serverTmpDir;
  
   // Constructors --------------------------------------------------
  
   /**
    * Private CTOR
    *
    * Requires that ServerConfig object is created
    * and registered to the jboss MBeanServer
    */
   private LibraryManager()
   {
      // discover if there is a local server library dir
      JBossASServerConfig config = ServerConfigLocator.locate();
      URL serverLibURL = config.getServerLibLocation();
     
      if (serverLibURL != null && serverLibURL.getProtocol().startsWith("file"))
      {
         this.serverLibDir = new File(serverLibURL.getFile());
         try
         {
           this.serverTmpDir = new File(config.getServerTempLocation().toURI());
         }
         catch (final URISyntaxException urise)
         {
           throw new RuntimeException("Error in initialization", urise);
         }

         log.debug("Using serverLibDir: " + this.serverLibDir);
         log.debug("Using serverTmpDir: " + this.serverTmpDir);
      }
      else
      {
         log.info("Cannot manage remote serverLibraryURL: " + serverLibURL);
      }
   }
  
   // Public --------------------------------------------------------
  
   /**
    * Gets the singleton
    */
   public static LibraryManager getInstance()
   {
      return INSTANCE;
   }
  
   /**
    * Upload a new library to server lib dir. A different
    * filename may be specified, when writing the library.
    *
    * If the target filename exists, upload is not performed.
    *
    * @param src the source url to copy
    * @param filename the filename to use when copying (optional) 
    * @return true if upload was succesful, false otherwise
    */
   public boolean uploadLibrary(URL src, String filename)
   {
      if (src != null)
      {
         log.debug("Uploading from URL: " + src);
         if (filename == null || filename.equals(""))
         {
            // get the basename of the url, let File do the dirty work
            filename = (new File(src.getPath())).getName();
            log.debug("Null or empty target filename, using basename: " + filename);
         }
         else
         {
            log.debug("Using target filename: " + filename);
         }
         // make sure target file does not exist
         File target = new File(this.serverLibDir, filename);
         if (!target.exists())
         {
            try
            {
               Files.copy(src, target);
               return true// success
            }
            catch (IOException e)
            {
               log.warn("Could not upload target library: " + filename, e);
            }
         }
         else
         {
            log.warn("Target library exists: " + filename);
         }
      }
      else
      {
         log.warn("Null src URL");
      }
      // upload failed
      return false;
   }
}
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