logging-log4j-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Sébastien Hiblot <sebastien.hib...@atosorigin.com>
Subject RE: Help !
Date Thu, 16 Jan 2003 15:19:49 GMT
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:steven.ebersole@vignette.com]
> 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:sebastien.hiblot@atosorigin.com]
>     |Sent: Thursday, January 16, 2003 7:22 AM
>     |To: log4j-user@jakarta.apache.org
>     |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
>     |
>     |
>     |--
>     |To unsubscribe, e-mail:
>     |<mailto:log4j-user-unsubscribe@jakarta.apache.org>
>     |For additional commands, e-mail:
>     |<mailto:log4j-user-help@jakarta.apache.org>
>     |
>
> --
> To unsubscribe, e-mail:
<mailto:log4j-user-unsubscribe@jakarta.apache.org>
For additional commands, e-mail: <mailto:log4j-user-help@jakarta.apache.org>


--
To unsubscribe, e-mail:   <mailto:log4j-user-unsubscribe@jakarta.apache.org>
For additional commands, e-mail: <mailto:log4j-user-help@jakarta.apache.org>


Mime
View raw message