@Override public void execute(Output output, String... params) { if (params.length == 2) { output.apply("Setting %s to: %s", params[0], params[1]); Log.setLevel(params[0], Level.toLevel(params[1])); output.blankLine(); } else { output.line("Usage: logger <name> <LEVEL>"); output.blankLine(); output.line("Known loggers:"); output.separator(); for (Log l : Log.getAllLoggers()) { output.line(l.getName()); } output.separator(); } }