Date: 2004-12-02T10:43:55
Editor: AndresValdez <[EMAIL PROTECTED]>
Wiki: Jakarta Commons Wiki
Page: Configuration
URL: http://wiki.apache.org/jakarta-commons/Configuration
I don�t know how to use the wiki very well, I hope someone edit this
Change Log:
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@@ -7,7 +7,87 @@
||Do you have a good example, add it here!||
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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