loggingconfigurator.java

jbpm的demo,带有流程设计

/**
 * $Source: /home/ws/rz65/CVS-Repository/WorkflowProjects/JBPM-Demo/src/java/jbpmdemo/logging/LoggingConfigurator.java,v $
 * $Revision: 1.1 $
 * $Date: 2005/03/05 12:16:28 $
 * $Author: rz65 $
 *
 * Copyright (c) 2005 Universitaet Karlsruhe (TH) / Rechenzentrum (RZ-UNI-UKA)
 *
 * RZ-UNI-KA makes no representations or warranties about the suitability
 * of this software, either express or implied, including but not limited
 * to the implied warranties of merchantability, fitness for a particular
 * purpose, or non-infringement. RZ-UNI-KA shall not be liable for any
 * damages as a result of using, modifying or distributing this software
 * or its derivatives.
 */

package jbpmdemo.logging;

import jbpmdemo.logging.LoggingConstants;

import org.apache.log4j.BasicConfigurator;

import org.apache.log4j.xml.DOMConfigurator;

/**
 * This class configures the logging system.
 * 
 * <p>
 * 
 * @version $Revision: 1.1 $
 * @author mailto:[e-mail]
 */

public class LoggingConfigurator extends Object implements LoggingConstants {

	// prevent instantiation
	private LoggingConfigurator() {
	}

	// indicates whether configuration was already done.
	private static boolean done = false;

	/**
	 * Configures the logging system. This method searches for a system property
	 * whose name matches the argument string. If this system property exists,
	 * its value is regarded as the path to an XML logging configuration file.
	 * Otherwise, a simple default configuration is achieved.
	 * 
	 * @param key
	 *            The system property key that identifies the path to the
	 *            configuration file.
	 */
	public static void configure(String key) {
		if (done)
			return;
		done = true;
		String path = System.getProperty(key);

		if (path == null) {
			BasicConfigurator.configure();
		} else {
			DOMConfigurator.configure(path);
		}
	}

	/**
	 * Configures the logging system from the default configuration path.
	 */
	public static void configure() {
		configure(SYSPROP_KEY_LOGGING_CONFIGURATION);
	}
}