>From what I'm seeing in the API, no, the NDC does not offer the ability
to change the priority of the log msgs. It simply adds a thread specific name
that can be used to filter msgs.
----- Original Message -----
From: "Christopher Taylor" <[EMAIL PROTECTED]>
To: "LOG4J Users Mailing List" <[EMAIL PROTECTED]>
Sent: Saturday, February 17, 2001 12:46 PM
Subject: Re: Using NDC to enable logging over a thread of control
> I've never tried the NDC approach before... do you think it would work?
>
>
> On Friday, February 16, 2001, at 07:55 PM, Scott M Stark wrote:
>
> > I think you have part of the picture correct, but what I'm missing here
> > is how all of the
> > log msgs in code that the thread interacts with ends up getting
> > associated with this
> > 'UserDebug' category.
> >
> > For example, I'm using a Category per Java package paradigm in which
> > every
> > class in a package logs through a Category with a name equal to the
> > package name.
> > So, if the servlet interacts with two packages in addition to the
> > servlet code,
> > say com.dscape.security and com.dscape.mail, I want any msgs issued
> > through
> > the Category("com.dscape.security") and Category("com.dscape.mail") to
> > show
> > up in the Category("'UserDebug") appender regardless of their priority
> > for this
> > particular call stack only. If my understanding of Category is correct,
> > I'm looking
> > for a transient heirachy of Categorys based on the thread stack rather
> > than any
> > static category namespace.
> >
> > ----- Original Message -----
> > From: Christopher Taylor
> > To: LOG4J Users Mailing List
> > Sent: Friday, February 16, 2001 6:56 PM
> > Subject: Re: Using NDC to enable logging over a thread of control
> >
> >
> > If I'm understanding your need correctly, you could probably do this in
> > the following way without any code changes to Log4J:
> >
> > - if the user is authenticated, you can get the principal from the
> > HttpServletRequest.
> > - If that user has been "enabled for debugging", get an instance of a
> > category for that user that is one step below a well-known
> > debugging category (for example, category "UserDebug" logs to a special
> > appender called "DebugUserProblems"). So, if I was
> > authenticated with an SSL certificate any my distinguished name was
> > "uid=ctaylor,dc=java-internals,dc=com", you could make the
> > category name "UserDebug.ctaylor". One technique for doing this is to
> > always get an instance of a category for logging in your
> > application, but it depends if the user is on the debug list or not if
> > calls go to the special log. You can put that instance of the
> > Category into the request attributes.
> >
> > Let me know if I'm misinterpreting you.
> >
> > -Chris
> >
> > On Friday, February 16, 2001, at 06:50 PM, Scott M Stark wrote:
> >
> >
> > I'm looking to correlate msgs with the active thread and to have the
> > Priority of
> > the thread override any Category.xxx() log msg invocation so that all
> > log statements
> > in this thread of control are rendered.
> >
> > The use case for this is a production J2EE server housing many EJBs,
> > servlets, etc.
> > and there is a problem report for particular user interacting with one
> > servlet. I don't
> > want to have to crank up the priority limit to dump out all possible
> > msgs. I just want
> > to toggle a request parameter that triggers logging throughout one
> > particular thread of
> > control the user is interacting with.
> >
> > ----- Original Message -----
> > From: "Christopher Taylor" <[EMAIL PROTECTED]>
> > To: "LOG4J Users Mailing List" <[EMAIL PROTECTED]>
> > Sent: Friday, February 16, 2001 6:27 PM
> > Subject: Re: Using NDC to enable logging over a thread of control
> >
> >
> >
> > Could you go into a little more detail? Do you want to correlate
> > messages with Threads
> > or with clients?
> >
> > -Chris
> >
> > Scott M Stark wrote:
> >
> >
> > One common logging task I use frequently in server development is the
> > ability to
> > enable logging across a thread of control beginning at some entry
> > point. An example
> > is enabling all log msgs regardless of priority that are executed
> > within a particular
> > servlet's service() method. Going through the log4j api I can't see a
> > way to do this.
> > Is this possible?
> >
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> >
> >
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