轻松禁用applet的log4j吗？

Question

I am building Java Desktop and Java Applet from the same code. Log4j is in use so almost every class in desktop version (which is original) has line like

private static final Logger LOG = LoggerFactory.getLogger(EachClassName.class);

Because Applet is not supposed to perform any io operations I had to exclude this configuration code:

InputStream is = Log4jConfigurator.class.getClassLoader().getResourceAsStream(path);
properties.load(is);
is.close();
PropertyConfigurator.configure(properties);

But now I get warnings because getLogger is still in place

log4j:WARN No appenders could be found for logger (org.game.client.Client).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

What would be the most elegant solution to avoid this warnings and use logger only in desktop version?

Answer 1

In your "Applet App" try to configure log4j programmatically:

1. turn off logging

   LogManager.getRootLogger().setLevel(Level.OFF);

2. Add NullAppender (if setting Level.OFF is not enough)

   LogManager.getRootLogger().addAppender(new NullAppender())