cvs commit: incubator-geronimo/modules/common/src/java/org/apache/geronimo/common/log/log4j URLConfigurator.java

[jd...@apache.org]

jdillon     2003/08/29 13:08:45

  Added:       modules/common/src/java/org/apache/geronimo/common/log/log4j
                        URLConfigurator.java
  Log:
   o Added a Log4j Configurator which handles the details of determining
     what type of delegate Configurator to use, currently only supports
     PropertyConfigurator and DOMConfigurator
  
  Revision  Changes    Path
  1.1                  incubator-geronimo/modules/common/src/java/org/apache/geronimo/common/log/log4j/URLConfigurator.java
  
  Index: URLConfigurator.java
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Apache" and "Apache Software Foundation" and
   *    "Apache Geronimo" must not be used to endorse or promote products
   *    derived from this software without prior written permission. For
   *    written permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    "Apache Geronimo", nor may "Apache" appear in their name, without
   *    prior written permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   * ====================================================================
   */
  
  package org.apache.geronimo.common.log.log4j;
  
  import java.io.IOException;
  
  import java.net.URL;
  import java.net.URLConnection;
  
  import org.apache.log4j.LogManager;
  import org.apache.log4j.PropertyConfigurator;
  import org.apache.log4j.xml.DOMConfigurator;
  import org.apache.log4j.spi.Configurator;
  import org.apache.log4j.spi.LoggerRepository;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  import org.apache.geronimo.common.NullArgumentException;
  
  /**
   * Handles the details of configuring Log4j from a URL.
   *
   * @version $Revision: 1.1 $ $Date: 2003/08/29 20:08:45 $
   */
  public class URLConfigurator
      implements Configurator
  {
      private static final Log log = LogFactory.getLog(URLConfigurator.class);
      
      public static void configure(final URL url)
      {
          new URLConfigurator().doConfigure(url, LogManager.getLoggerRepository());
      }
      
      private boolean isContentXML(final URL url)
      {
          String contentType = null;
          
          // Get the content type to see if it is XML or not
          try {
              URLConnection connection = url.openConnection();
              contentType = connection.getContentType();
              if (log.isTraceEnabled()) {
                  log.trace("Content type: " + contentType);
              }
          }
          catch (IOException e) {
              log.warn("Could not determine content type from URL; ignoring", e);
          }
          
          if (contentType != null) {
              return contentType.toLowerCase().endsWith("/xml");
          }
          
          return url.getFile().toLowerCase().endsWith(".xml");
          
          //
          // TODO: Add check for <?xml in content
          //
      }
      
      private Configurator getConfigurator(final URL url)
      {
          if (isContentXML(url)) {
              return new DOMConfigurator();
          }
          
          return new PropertyConfigurator();
      }
      
      public void doConfigure(final URL url, final LoggerRepository repo)
      {
          if (log.isDebugEnabled()) {
              log.debug("Configuring from URL: " + url);
          }
          
          // Get the config delegate and target repository to config with
          Configurator delegate = getConfigurator(url);
          
          if (log.isTraceEnabled()) {
              log.trace("Configuring Log4j using configurator: " + 
                        delegate + ", repository: " + repo);
          }
          
          // Now actually configure Log4j
          delegate.doConfigure(url, repo);
      }
  }