I also use Weblogic and war/ear file deployment. However, I just wrote a
simple little set of JSPs to allow dynamic overrides of the level for
defined appenders. This is particular useful for things like user-specific
loggers...
However, I let log4j initialize itself initially from its config files.
Just some thoughts...
|-----Original Message-----
|From: Sébastien Hiblot [mailto:[EMAIL PROTECTED]]
|Sent: Thursday, January 16, 2003 9:20 AM
|To: Log4J Users List
|Subject: RE: Help !
|
|
|Thx a lot !!!
|the problem was that we always add the appenders. So, the
|first time it's ok
|but after, we always add the two appenders.....
|
|Now we use the exists method in order to know if the logger exists.
|if not, we create the logger and then add the appenders.
|if exists, we do nothing !
|
|You ask why we make the config in the java code.
|For our java web site, we use Weblogic and ear file.
|We have to specify and modify easily some parameter
|without deploying the
|ear file like the level,
|the file where we write, the repository where is the xml
|containing the
|message.
|
|But with a config file, we can't change easily this
|parameters, we have to
|deploy the ear, make the modification
|and then rebuild the ear !
|
|Thx a lot for your help.
|
|
|> -----Message d'origine-----
|> De : Ebersole, Steven [mailto:[EMAIL PROTECTED]]
|> Envoyé : jeudi 16 janvier 2003 14:54
|> À : 'Log4J Users List'
|> Objet : RE: Help !
|>
|>
|> Step-by-step what is happening here is:
|>
|> First-call:
|> 1) A logger with a name matching the given class_name
|does not exist, so
|> log4j creates it.
|> 2) Two appenders are added to the logger (a console
|appender and a file
|> appender).
|>
|> Second-call:
|> 1) A logger with a name matching the given class name already
|> exists (it was
|> created above), so that logger is returned (including
|the two appenders
|> previously attached)
|> 2) Two appenders are added to the logger (a console
|appender and a file
|> appender).
|>
|> Etc...
|>
|>
|> Assuming that there is a vaild reason you need to wrap all these
|> log4j calls
|> inside your own hand-rolled class, then try something
|like the following
|> code change in the constructor:
|>
|>
|> public Trace( String class_name )
|> {
|> if (!LogManager.exists( class_name ))
|> {
|> logger = LogManager.getLogger(class_name);
|> Layout layout = new
|> PatternLayout("%d{yyyyMMdd-HH:mm:ss} %m%n");
|> logger.addAppender(new ConsoleAppender(layout,
|> ConsoleAppender.SYSTEM_OUT));
|> logger.setLevel(Level.DEBUG);
|> try
|> {
|> logger.addAppender(new FileAppender(layout,
|>
|(String)Ecx_constants.getInstance().get("log4j_fileTrace"), true));
|> }
|> catch (IOException e)
|> {}
|> }
|> }
|>
|> But the better solution is to perform initialization of
|the log4j library
|> through config files.
|>
|>
|>
|>
|>
|> |-----Original Message-----
|> |From: Sébastien Hiblot
|[mailto:[EMAIL PROTECTED]]
|> |Sent: Thursday, January 16, 2003 7:22 AM
|> |To: [EMAIL PROTECTED]
|> |Subject: Help !
|> |
|> |
|> |Hi,
|> |
|> |We're working on a java web site and we'd like to use
|> |log4j in order
|> |to log the error.
|> |
|> |We have made a class to implement the init of log4j. Here
|> |the source of this
|> |class :
|> |
|> |private Logger logger ;
|> |
|> |public Trace(String class_name) {
|> | logger = LogManager.getLogger(class_name);
|> | Layout layout = new
|> |PatternLayout("%d{yyyyMMdd-HH:mm:ss} %m%n");
|> | logger.addAppender(new ConsoleAppender(layout,
|> |ConsoleAppender.SYSTEM_OUT));
|> | logger.setLevel(Level.DEBUG);
|> | try {
|> | logger.addAppender(new
|FileAppender(layout, (String)
|> |Ecx_constants.getInstance().get("log4j_fileTrace"), true));
|> | } catch (IOException e) {
|> |}
|> |
|> |To log something :
|> |Trace t = new Trace(this.getClass().toString()) ;
|> |t.debug("My message");
|> |
|> |The first time, we call the page, the log contain
|the good thing :
|> |20030116-12:00:00 My message
|> |
|> |But the second time we call the page, 30 sec after, we
|> |have in the log:
|> |20030116-12:00:00 My message
|> |20030116-12:00:30 My message
|> |20030116-12:00:30 My message
|> |
|> |==> the log appears 2 times !
|> |the third time, the log appears 3 time, etc......
|> |
|> |Can you help us please ?
|> |
|> |Thx
|> |
|> |
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