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I have made an Auto-configuration-Reloading Class. This class implements the Runnable interface and inherits from PropertiesConfiguration. This class alsa has a Singleton behavior, so there is only one Configuration class at time, provided every X milliseconds.

You can see the implementation here:

public class Configuration extends PropertiesConfiguration implements Runnable {
//Logger
static Log log = LogFactory.getLog(Configuration.class);

//Cargar el archivo de queries al inicializar la clase
private static String configFile;
private static boolean goOn = true;

static {
configFile = "config.txt";
}

/**

• Holds singleton instance */
  private static Configuration instance;
  /**
• prevents instantiation */
  private Configuration() {
  // prevent creation
  }
  private Configuration(String file) throws ConfigurationException {
  super(file);
  }
  /**

• Returns the "singleton" instance. @return the singleton instance */
  static public Configuration getInstance() {
  if (instance == null) {
  try {
  instance = new Configuration(configFile);
  log.debug("Loaded:" + ((PropertiesConfiguration) instance).toString());
  } catch (ConfigurationException e) {
  log.error("Error reading configuration file: " + configFile);
  }
  }
  return instance;
  }
  public static void main(String[] args) {
  Thread t = new Thread(Configuration.getInstance());
  t.start();
  }
  /* Runner

• @see java.lang.Runnable#run() */
  public void run() {
  while (goOn) {
  try {
  instance = new Configuration(configFile);
  log.debug("Loaded:" + ((PropertiesConfiguration) instance).toString());
  } catch (ConfigurationException e) {
  log.error("Error reading configuration file: " + configFile);
  } catch (Exception e) {
  log.error("Error reading configuration file: " + configFile);
  }
  try {
  Thread.sleep(instance.getLong("reload.config.after"));
  } catch (InterruptedException e) {
  log.error("Error reading configuration file: " + configFile);
  log.error(": " + e.getLocalizedMessage());
  }
  }
  }
  }
  
  
  
  

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