java.util.logging.Logger doesn't respect java.util.logging.Level?

gsmd_15187 0
Viewed 52113

In plain Java SE 6 environment:

Logger l = Logger.getLogger("nameless");
l.setLevel(Level.ALL);
l.fine("somemessage");

Nothing shows up in Eclipse console. l.info("") and above works just fine, but anything below fine just doesn't seem to work. What's could be wrong? TIA.

logging java
6 Answers

Even though the Logger level is set to ALL, the ConsoleHandler (the default Handler on the logger) still has a default level of INFO. This comes from the default logging.properties in JAVA_HOME/jre/lib

Kevin_266200

Instead of looping through all handlers and set the logging level, I prefer to set only the level of the console handler:

//get the top Logger
Logger topLogger = java.util.logging.Logger.getLogger("");

// Handler for console (reuse it if it already exists)
Handler consoleHandler = null;
//see if there is already a console handler
for (Handler handler : topLogger.getHandlers()) {
    if (handler instanceof ConsoleHandler) {
        //found the console handler
        consoleHandler = handler;
        break;
    }
}


if (consoleHandler == null) {
    //there was no console handler found, create a new one
    consoleHandler = new ConsoleHandler();
    topLogger.addHandler(consoleHandler);
}
//set the console handler to fine:
consoleHandler.setLevel(java.util.logging.Level.FINEST);
user_3690600

Other users have already given good answer why it happened (ConsoleHandler has a separate level variable). I reuse my application logger's level and copy it up to the parent hiearchy. Also provides easy way to refresh levels at runtime anytime I want.

// Set same level all loggers and handlers up to the parent level
// OFF,SEVERE,WARNING,INFO,CONFIG,FINE,FINER,FINEST,ALL
Logger logger = Logger.getLogger(this.getClass().getPackage().getName());
//Level level = Level.parse("FINEST");
Level level = logger.getLevel();
Logger tempLogger = logger;
while(tempLogger != null) {
   tempLogger.setLevel(level);
   for(Handler handler : tempLogger.getHandlers())
      handler.setLevel(level);
   tempLogger = tempLogger.getParent();
}
user_1855650
Related