// Copyright (c) 2000 Just Objects B.V. <just@justobjects.nl>
// Distributable under LGPL license. See terms of license at gnu.org.

package nl.justobjects.pushlet.util;

import nl.justobjects.pushlet.core.Config;
import nl.justobjects.pushlet.core.ConfigDefs;

/**
 * Logging wrapper.
 * <p/>
 * Provides a hook to direct logging to your own logging library. Override the
 * DefaultLogger class by setting "logger.class" in pushlet.properties to your
 * own logger to integrate your own logging library.
 * 
 * @author Just van den Broecke
 * @version $Id: Log.java,v 1.5 2007/12/07 12:57:40 justb Exp $
 */
public class Log implements ConfigDefs {
  /**
   * Init with default to have at least some logging.
   */
  private static PushletLogger logger = new DefaultLogger();

  /**
   * General purpose initialization.
   */
  static public void init() {
    try {
      logger = (PushletLogger) Config.getClass(LOGGER_CLASS, "nl.justobjects.pushlet.util.DefaultLogger").newInstance();
    } catch (Throwable t) {
      // Hmmm cannot log this since we don't have a log...
      System.out.println("Cannot instantiate Logger from config ex=" + t);
      return;
    }

    logger.init();

    // Set log level
    logger.setLevel(Config.getIntProperty(Config.LOG_LEVEL));

    logger.info("Logging intialized logger class=" + logger.getClass());
  }

  /**
   * Log message for trace level.
   * 
   * @param aMessage
   *          the message to be logged
   */
  static public void trace(String aMessage) {
    logger.debug(aMessage);
  }

  /**
   * Log message for debug level.
   * 
   * @param aMessage
   *          the message to be logged
   */
  static public void debug(String aMessage) {
    logger.debug(aMessage);
  }

  /**
   * Log message for info level.
   * 
   * @param aMessage
   *          the message to be logged
   */
  static public void info(String aMessage) {
    logger.info(aMessage);
  }

  /**
   * Log message for warning level.
   * 
   * @param aMessage
   *          the message to be logged
   */
  static public void warn(String aMessage) {
    logger.warn(aMessage);
  }

  /**
   * Log message for warning level with exception.
   * 
   * @param aMessage
   *          the message to be logged
   * @param aThrowable
   *          the exception
   */
  static public void warn(String aMessage, Throwable aThrowable) {
    logger.warn(aMessage, aThrowable);
  }

  /**
   * Log message for error level.
   * 
   * @param aMessage
   *          the message to be logged
   */
  static public void error(String aMessage) {
    logger.error(aMessage);
  }

  /**
   * Log message (error level with exception).
   * 
   * @param aMessage
   *          the message to be logged
   * @param aThrowable
   *          the exception
   */
  static public void error(String aMessage, Throwable aThrowable) {
    logger.error(aMessage, aThrowable);
  }

  /**
   * Log message for fatal level.
   * 
   * @param aMessage
   *          the message to be logged
   */
  static public void fatal(String aMessage) {
    logger.fatal(aMessage);
  }

  /**
   * Log message (fatal level with exception).
   * 
   * @param aMessage
   *          the message to be logged
   * @param aThrowable
   *          the exception
   */
  static public void fatal(String aMessage, Throwable aThrowable) {
    logger.fatal(aMessage, aThrowable);
  }

  /**
   * Set log level
   * 
   * @param aLevel
   *          the message to be logged
   */
  static public void setLevel(int aLevel) {
    logger.setLevel(aLevel);
  }
}

/*
 * $Log: Log.java,v $ Revision 1.5 2007/12/07 12:57:40 justb added log4j and
 * make it the default logging method
 * 
 * Revision 1.4 2007/11/23 21:29:43 justb add hooks for custom logging (you can
 * override DefaultLogger in pushlet.properties)
 * 
 * Revision 1.3 2007/11/23 21:10:17 justb add hooks for custom logging (you can
 * override DefaultLogger in pushlet.properties)
 * 
 * Revision 1.2 2005/02/21 11:15:59 justb support log levels
 * 
 * Revision 1.1 2005/02/18 10:07:23 justb many renamings of classes (make names
 * compact)
 * 
 * Revision 1.7 2004/09/03 22:35:37 justb Almost complete rewrite, just checking
 * in now
 * 
 * Revision 1.6 2004/08/12 13:16:08 justb make debug flag false
 * 
 * Revision 1.5 2004/03/10 14:01:55 justb formatting and *Subscriber refactoring
 * 
 * Revision 1.4 2003/08/15 09:54:46 justb fix javadoc warnings
 * 
 * Revision 1.3 2003/08/15 08:37:40 justb fix/add Copyright+LGPL file headers
 * and footers
 * 
 * Revision 1.2 2003/08/12 09:42:47 justb enhancements
 * 
 * Revision 1.1 2003/08/12 08:46:00 justb cvs comment tags added
 */