James:
Thanks alot for your reply. That's exactley what I was missing. Of
course sub is not a child of logger (as classes) since it was entended
form Logger.
Now I need just to confirm what I have learnt so far.
public class MainClass{
Logger mainLogger=Logger.getLogger(this.getClass());
BasicConfigurator.configure();
mainLogger.setLevel(Level.ALL);
//.....
//more code
new AnotherClass();
}
class AnotherClass{
//code
Logger subLogger=Logger.getLogger(this.getClass());
BasicConfigurator.configure();
sub.setLevel(Level.ALL);
//more code
}
in this situation, subLogger is a child of mainLogger. Am I right??
that's what I understand. and I need someone to confirm this.
If I am right, then all I have to do is to configure the mainLogger
(Level, appender, ...etc ) which is I am not worried about at this point.
I just want to know, is that the hierarchy in log4j ??
James Stauffer wrote:
I think you might be getting the class and logger hierarchies confused.
sub is not a child of logger (as classes) but the "sub" logger is a
child (in the logger hierarchy) of the "logger" logger.
On 9/12/06, Mansour <[EMAIL PROTECTED]> wrote:
Thanks for helping:
Yes, I am using this every time I need a logger, but once in every
class. My confussion about hierarchy is I dont know when to use it. Ok
Here's what I know:
I understand the structure of any tree, and the parent.child notation,
but how to create a child logger, and why, and when ??
another question: Lets say I have,
public class MyMain{
//code
Logger logger=Logger.getLogger(this.getClass());
BasicConfigurator.configure();
logger.setLevel(Level.ALL);
new SubClass();
//more code
}
public class SubClass{
//code
Logger sub=Logger.getLogger(this.getClass());
BasicConfigurator.configure();
sub.setLevel(Level.ALL);
//more code
}
Now in this situation, is sub a child of logger, as logger was created
in the parent class ? I dont wanna get into using appenders at this
point until I understand the architecture of the package. I would like
to understand the hierarchy before going any furthure with log4j.
Thank you
Blok, Eelke wrote:
>Hi again,
>
>I just realised something else. You say this is the code you're using:
>[...]
>Logger logger=Logger.getLogger(this.getClass());
>BasicConfigurator.configure();
>logger.setLevel(Level.ALL);
>[...]
>
>In hindsight, I think my previous message may confuse you where I talk
>about attaching multiple appenders and such, because you're only using
>the basic configurator and you're not directly dealing with any
>appenders (they are an essential part of what makes Log4J so flexible;
>be sure to check out the usage of other configurators that let you use
>configuration files).
>
>I think what your problem actually is, is that you're doing this
>wherever you want a logger (correct?). You shouldn't. You should
>basically only call a configurator once, near the start of your
>application. After that, you can request loggers to your heart's
content
>and log to them. I'm not sure what the effect of configurating log4j
>multiple times will be, but I think you may well end up with multiple
>appenders (one for each time you call configure()) attached to your
>logger tree, which would explain the multiple log entries.
>
>Regards,
>
>Eelke
>
>
>-----Original Message-----
>From: Mansour [mailto:[EMAIL PROTECTED]
>Sent: dinsdag 12 september 2006 9:02
>To: Log4J Users List
>Subject: Logger.getRootLogger() or Logger.getLogger(this.getClass())
>
>
>Hi there:
>I am still new to logging with java. In my project I am using log4j in
>each class to trace the excution. However, at some points I'n getting
>the logs twice.
>I 'll explain what I did. I am using somehting like this in all the
>classes :
>
>Logger logger=Logger.getLogger(this.getClass());
>BasicConfigurator.configure();
>logger.setLevel(Level.ALL);
>//some code ......
>logger.info("myMessage");
>//more code ....
>
>when, a method is executed, it logs the message at least 2 times !!!
>what's is going on?? by the way, I dont understand the herirachy in the
>log4j. I mean what's the difference between Logger.getRootLogger() and
>Logger.getLogger(this.getClass()) ??
>
>
>
>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: [EMAIL PROTECTED]
>For additional commands, e-mail: [EMAIL PROTECTED]
>
>
>
>PRIVACY: The information transmitted is intended only for the person or
>entity to which it is addressed and may contain confidential and/or
>priviliged material. Any review, retransmission, dissemination or other
>use of this information by persons or entities other than the intended
>recipient is prohibited. If you received this in error, please contact
>the sender and delete the material from any computer. Thank you.
>
>
>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: [EMAIL PROTECTED]
>For additional commands, e-mail: [EMAIL PROTECTED]
>
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
