+ @Override
+ public Collection<String> listAvailableEvents() {
+ List<String> ret = new ArrayList<String>();
+
+ @SuppressWarnings("unchecked")
+ List<Logger> loggers = Collections.list(LogManager.getCurrentLoggers());
+ for (Logger logger : loggers) {
+ /*
+ * Check if that logger has at least one LTTng log4j appender
+ * attached.
+ */
+ if (hasLttngAppenderAttached(logger)) {
+ ret.add(logger.getName());
+ }
+ }
+
+ return ret;
+ }
+
+ private static boolean hasLttngAppenderAttached(Logger logger) {
+ @SuppressWarnings("unchecked")
+ List<Appender> appenders = Collections.list(logger.getAllAppenders());
+ for (Appender appender : appenders) {
+ if (appender instanceof LttngLogAppender) {
+ return true;
+ }
+ }
+ return false;
+ }