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Posted to log4j-user@logging.apache.org by zimske <zi...@gmail.com> on 2006/05/30 14:55:14 UTC
Extracting information from log4j messages
Hello
I'd like to know if there's a way to extract detailed information from the
message that is generated with the defined pattern. I'm aware of
getThreadName(), getMessage() methods and so forth. However, my layout
formats the message with following pattern: %d{ABSOLUTE} %5p (%l) - [%c] -
%m%n. The message looks like this:
14:42:42,618 INFO (test.Test.main(Test.java:18)) - [test.Test] - BLAH BLAH
for the method call
logger.info("BLAH BLAH");
However, getMessage method will simply return "BLAH BLAH".
So, basically, through patterns I can get detailed information of what
happened, when it happened, and where it happened. Can I get these
information (method, package, line number) through log4j API as well?
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Re: Extracting information from log4j messages
Posted by zimske <zi...@gmail.com>.
-----------
The elements of your specified pattern basically do the following:
%d{ABSOLUTE} - Formats the value of LoggingEvent.timestamp (also
available using LoggingEvent.getTimestamp() in log4j 1.3).
%p - Formats the value of LoggingEvent.level (LoggingEvent.getLevel())
%l - Formats the value of LoggingEvent.getLocationInfo().
%c - Formats the value of LoggingEvent.categoryName (or
LoggingEvent.getLoggerName()).
%m - Formats the value of LoggingEvent.getMessage().
---------------
Thanks for replies, guys, i've figured it out. The key is to call methods on
this one:
LoggingEvent.getLocationInformation().
There are methods that when called on the object above, return the line
number (logEvent.getLocationInformation().getLineNumber()) method name
(logEvent.getLocationInformation().getMethodName()), full information
(logEvent.getLocationInformation().fullInfo) and so forth.
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Re: Extracting information from log4j messages
Posted by Curt Arnold <ca...@apache.org>.
On May 30, 2006, at 7:55 AM, zimske wrote:
>
> Hello
>
> I'd like to know if there's a way to extract detailed information
> from the
> message that is generated with the defined pattern. I'm aware of
> getThreadName(), getMessage() methods and so forth. However, my layout
> formats the message with following pattern: %d{ABSOLUTE} %5p (%l) -
> [%c] -
> %m%n. The message looks like this:
>
> 14:42:42,618 INFO (test.Test.main(Test.java:18)) - [test.Test] -
> BLAH BLAH
>
> for the method call
>
> logger.info("BLAH BLAH");
> However, getMessage method will simply return "BLAH BLAH".
>
> So, basically, through patterns I can get detailed information of what
> happened, when it happened, and where it happened. Can I get these
> information (method, package, line number) through log4j API as well?
>
org.apache.log4j.PatternLayout produces the formatted string that you
quoted by accessing the information from a
org.apache.log4j.spi.LoggingEvent. You said that you called
getMessage() and got back "BLAH BLAH". I'm assuming that you were
calling getMessage() on an instance of o.a.l.spi.LoggingEvent, so you
already have figured out how to get access to a LoggingEvent.
The elements of your specified pattern basically do the following:
%d{ABSOLUTE} - Formats the value of LoggingEvent.timestamp (also
available using LoggingEvent.getTimestamp() in log4j 1.3).
%p - Formats the value of LoggingEvent.level (LoggingEvent.getLevel())
%l - Formats the value of LoggingEvent.getLocationInfo().
%c - Formats the value of LoggingEvent.categoryName (or
LoggingEvent.getLoggerName()).
%m - Formats the value of LoggingEvent.getMessage().
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Re: Extracting information from log4j messages
Posted by James Stauffer <st...@gmail.com>.
Look at the code to see how it gets that info.
On 5/30/06, zimske <zi...@gmail.com> wrote:
>
> Hello
>
> I'd like to know if there's a way to extract detailed information from the
> message that is generated with the defined pattern. I'm aware of
> getThreadName(), getMessage() methods and so forth. However, my layout
> formats the message with following pattern: %d{ABSOLUTE} %5p (%l) - [%c] -
> %m%n. The message looks like this:
>
> 14:42:42,618 INFO (test.Test.main(Test.java:18)) - [test.Test] - BLAH BLAH
>
> for the method call
>
> logger.info("BLAH BLAH");
> However, getMessage method will simply return "BLAH BLAH".
>
> So, basically, through patterns I can get detailed information of what
> happened, when it happened, and where it happened. Can I get these
> information (method, package, line number) through log4j API as well?
>
>
> --
> View this message in context: http://www.nabble.com/Extracting+information+from+log4j+messages-t1704397.html#a4626356
> Sent from the Log4j - Users forum at Nabble.com.
>
>
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> To unsubscribe, e-mail: log4j-user-unsubscribe@logging.apache.org
> For additional commands, e-mail: log4j-user-help@logging.apache.org
>
>
--
James Stauffer
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