'Re: Custom appender question about getRenderedMessage()'

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List:       log4j-user
Subject:    Re: Custom appender question about getRenderedMessage()
From:       "James Stauffer" <stauffer.james () gmail ! com>
Date:       2007-03-23 15:18:00
Message-ID: c83e39890703230818s52376afx6092692410b99d9 () mail ! gmail ! com
[Download RAW message or body]

In your subclass on PatternLayout you can probably change the message
by over-riding the format method.

On 3/23/07, Bret Schuhmacher <bret@ingrian.com> wrote:
> Yes, thanks, that's what I've done.  However, I cannot gain access to
> the fully rendered message, only the original message.  I need access to
> the fully rendered message so I can do what I need to do.
>
> Rgds,
>
> Bret
>
>
> > -----Original Message-----
> > From: James Stauffer [mailto:stauffer.james@gmail.com]
> > Sent: Friday, March 23, 2007 10:57 AM
> > To: Log4J Users List
> > Subject: Re: Custom appender question about getRenderedMessage()
> >
> > I would extend PatternLayout to change the message and only extend
> > RollingFileAppender to alter the rollOver functionality.
> >
> > On 3/23/07, Bret Schuhmacher <bret@ingrian.com> wrote:
> > > Thanks, James.  I did more digging around and was able to add a "%s"
> > > to my ConversionPattern using a custom PatternLayout subclass.  I
> can
> > > get my custom text to print out where I want now.
> > >
> > > BUT - the custom text is based on the rest of the row - there is
> some
> > > amount of calculation that must be done based on the contents of the
> > > rest of the row.  I need to get the *fully rendered message* as it
> > > would be written to the file so I can do the calculations and create
> > > the custom text that goes on the front.  In addition, I need to
> alter
> > > the rollOver functionality, so I think subclassing the
> > > RollingFileAppender is needed.
> > >
> > > Unfortunately, getRenderedMessage just returns the original text of
> > > the message to be logged, not the message that has all the modifiers
> > > replaced (i.e. with time, thread, class, etc.).  Is it possible to
> > get
> > > the fully rendered message?
> > >
> > > Thanks,
> > >
> > > Bret
> > >
> > >
> > > > -----Original Message-----
> > > > From: James Stauffer [mailto:stauffer.james@gmail.com]
> > > > Sent: Friday, March 23, 2007 10:03 AM
> > > > To: Log4J Users List
> > > > Subject: Re: Custom appender question about getRenderedMessage()
> > > >
> > > > If you want to change the text of the message, you shouldn't do
> > that
> > > in
> > > > the appender -- the layout is a much better place to do that.
> > > >
> > > > Can you just change your ConversionPattern to the following and
> not
> > > > subclass RollingFileAppender?
> > > > <my custom text> %d %5p [%t][%40C::%-20M(%3L)]-%m%n
> > > >
> > > > On 3/22/07, Bret Schuhmacher <bret@ingrian.com> wrote:
> > > > > Hi,
> > > > >
> > > > > I'm trying to extend RollingFileAppender.  I want to manipulate
> > > > > the
> > > > > *complete* message that's logged by prepending something to the
> > > > > message just before it's dumped into the file.
> > > > >
> > > > > My custom class's append() tries to create a new LoggingEvent
> > from
> > > > the
> > > > > given LoggingEvent, prepending my text to the
> > > > > event.getRenderedMessage(), then calls
> > > > super.append(myNewLoggingEvent).
> > > > > Unfortunately,  getRenderedMessage just returns the original
> > > > > message
> > > > I
> > > > > wanted logged, not the full message rendered with my
> > > > ConversionPattern.
> > > > > My ConversionPattern is set to this, btw:
> > > > > %d %5p [%t][%40C::%-20M(%3L)]-%m%n
> > > > >
> > > > > Said another way, I want this:
> > > > > logger.debug("my message");
> > > > >
> > > > > to get rendered and written to file like this:
> > > > > <my custom text> 2007-03-22 19:05:05,615 DEBUG
> > > > > [main][com.xxxxxx.TestMain::<init> ( 26)]-my message
> > > > >
> > > > > Is there a way to make this happen?  I can't seem to get my
> hands
> > > > > on the full, rendered message ("2007-03-22 19:05:05,615 DEBUG
> > > > > [main][com.xxxxxx.TestMain::<init> ( 26)]-my message") so I can
> > > > > prepend "<my custom text>".
> > > > >
> > > > > I've tried creating an ObjectRenderer, too, but I don't think
> > > > > that's the way I should go (is it?).  If I could grab the full
> > > > > rendered message and prepend my String and then *reset* the
> > > > > rendered message
> > > I
> > > > > think I'd be fine, but I'm not sure...
> > > > >
> > > > > FWIW, I'm using 1.2.14.
> > > > >
> > > > >
> > > > > Thanks!
> > > > >
> > > > > Bret
> > > > >
> > > > >
> > > > >
> > > > >
> > >
> ---------------------------------------------------------------------
> > > > > To unsubscribe, e-mail:
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> > > > > log4j-user-help@logging.apache.org
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > > James Stauffer        http://www.geocities.com/stauffer_james/
> > > > Are you good? Take the test at http://www.livingwaters.com/good/
> > > >
> > > >
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> > >
> > >
> > >
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> > >
> > >
> >
> >
> > --
> > James Stauffer        http://www.geocities.com/stauffer_james/
> > Are you good? Take the test at http://www.livingwaters.com/good/
> >
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> > For additional commands, e-mail: log4j-user-help@logging.apache.org
>
>
>
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>
>


-- 
James Stauffer        http://www.geocities.com/stauffer_james/
Are you good? Take the test at http://www.livingwaters.com/good/

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