Re: Silly ? - How do I figure out the name of the file the log is being written to?

[Paul Smith]

Ok, my brain took far longer to work this out than it should of.







Hope that helps you.

Paul

On 02/12/2005, at 9:27 AM, Burton Strauss wrote:

The issue here is that the Appender is attached to the Root logger, not the Logger named 'test'. What you see is the additivity property working for you (or against you, depending on your point of view). The 'test' appender is attached to the Root logger, but any log message sent to the "test" logger goes to all appenders attached to the test logger, PLUS any up the hierarchy, right up to the Root logger. This is a feature of log4j, and can be disabled by setting the additivity property of a Logger to false. I guess getAllAppenders()'s name has confused you. It does not get "All appenders that may be used by this logger during logging", it returns "All appenders explicitly added to _this_ logger only."

Nope, it's the same log4j.properties. I had an old one lying around in NetBeans which was the 'same' except the name wasn't test, it was a company name. That was what was being picked up, so that's why 'test' didn't work - but 'xyzcorp' did. I found this when I changed the name from testbed.log to

somethingelse.log and it didn't change.


specific instance if I know it.

What I can't get is the generic case, where I'm walking enumeration of
loggers and checking each of them for their associated appenders.

So please throw away ANYTHING beyond my last message.

Log4j.properties-------------------
log4j.rootLogger=info,test
log4j.appender.test=org.apache.log4j.DailyRollingFileAppender
log4j.appender.test.Append=false
log4j.appender.test.File=somethingelse.log
log4j.appender.test.layout=org.apache.log4j.SimpleLayout
log4j.debug=true
-----------------------------------

Source-----------------------------
  public static void main(String[] args) {
    Logger logger = null;
    logger = logger.getLogger("test");
    logger.info("Beginning logger test");
    int countOfLoggers = 0;
    Enumeration loggers =
LogManager.getLoggerRepository().getCurrentLoggers();
    if(loggers != null){
      while(loggers.hasMoreElements()){
        Logger l = (Logger)loggers.nextElement();
        System.out.println("Logger #" + (++countOfLoggers) + " is " +
l.getName());
        int countOfAppenders = 0;
        Enumeration allAppenders = l.getAllAppenders();
        if(null == allAppenders) {
          System.out.println("\tgetAllAppenders() returned null");
          continue;
        }

{
          System.out.println("\tgetAllAppenders() returned
NullEnumeration");
          continue;
        }

        while(allAppenders.hasMoreElements()){
          Appender t = (Appender)allAppenders.nextElement();

          if(null == t) {
            System.out.println("\tAppender is null");
          } else {
            countOfAppenders++;
            if(t instanceof FileAppender) {
              FileAppender fileAppender = (FileAppender)t;

                   t.getName() + " is FileAppender " +
fileAppender.getFile());
            } else {

t.getName() + " is something else");
            }
          }
        }
      }
    }
  }
}
-----------------------------------

Output-----------------------------
log4j: Parsing for [root] with value=[info,test].
log4j: Level token is [info].
log4j: Category root set to INFO
log4j: Parsing appender named "test".
log4j: Parsing layout options for "test".
log4j: End of parsing for "test".
log4j: Setting property [file] to [somethingelse.log].
log4j: Setting property [append] to [false].
log4j: setFile called: somethingelse.log, false
log4j: setFile ended
log4j: Appender [test] to be rolled at midnight.
log4j: Parsed "test" options.
log4j: Finished configuring.
Logger #1 is test
        getAllAppenders() returned NullEnumeration
-----------------------------------

TIA!

-----Burton

-----Original Message-----
From: Paul Smith [mailto:[EMAIL PROTECTED]
Sent: Thursday, December 01, 2005 3:36 PM
To: Log4J Users List

being written to?


On 02/12/2005, at 8:03 AM, Burton Strauss wrote:

So I've gotten past the point of being able to figure out the name of the if(allAppenders instanceof org.apache.log4j.helpers.NullEnumeration) System.out.println("\tAppender " + countOfAppenders + " " + System.out.println("\tAppender " + countOfAppenders + " " + Subject: Re: Silly ? - How do I figure out the name of the file the log is

That's easy ... console output is from System.out.println(). How else

are you going to test the logger if you can't trust it... :-)

Umm, in your original post you had log4j logging in the test:
     Appender t = LogManager.getRootLogger().getAppender( "test");
     if(null == t) {

null");
     } else if(t instanceof FileAppender) {

FileAppender");
     } else {

something else");
     }

logger.info("LogManager.getRootLogger().getAppender(\"test \") is logger.info("LogManager.getRootLogger().getAppender(\"test \") is logger.info("LogManager.getRootLogger().getAppender(\"test \") is

But the other path still fails.  I expanded the test program to this:

  public static void main(String[] args) {
    Logger logger = null;
    logger = logger.getLogger("test");
    logger.info("Beginning logger test");
    int countOfLoggers = 0;
    Enumeration loggers =
LogManager.getLoggerRepository().getCurrentLoggers();
    if(loggers != null){
      while(loggers.hasMoreElements()){

</snip>

Ok, in this test you have gotten rid of your log4j.properties....

FileAppender ?  Or what _is_ configuring log4j in this test?

Paul


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Correct? If so, then where is the configuration of actually _adding_ the

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