Events in log4j can be generated in two ways:
- log methods in code (logger.debug, etc)
- a receiver
Appenders can process events generated by either of these mechanisms.
In your case, you want to process events stored in a log file
(LogFilePatternReceiver) and store those events in a database (JDBCAppender).
Specify both the receiver and appender configuration in the same xml config
file and it should work fine.
All you should need to do is create a simple class whose main method calls
DomConfigurator.configure("c:/log4j/log4j.xml").
Here's an example configuration that provides a logfilepatternreceiver and a
consoleappender with an attached expressionfilter (requires log4j 1.3 alpha
jars and jakarta-oro jar).
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration >
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/";
debug="true">
<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.SimpleLayout"/>
<filter class="org.apache.log4j.filter.ExpressionFilter">
<param name="Expression" value="msg ~= 'SPECIFY CASE-INSENSITIVE MSG
MATCH HERE'" />
<param name="AcceptOnMatch" value="true"/>
</filter>
<filter class="org.apache.log4j.filter.DenyAllFilter"/>
</appender>
<plugin name="LOGFILE" class="org.apache.log4j.varia.LogFilePatternReceiver">
<param name="fileURL" value="file:///c:/some.log"/>
<param name="timestampFormat" value="yyyy-MM-dd HH:mm:ss,SSS"/>
<param name="logFormat" value="TIMESTAMP LEVEL [LOGGER] MESSAGE"/>
<param name="name" value="my log file"/>
<param name="tailing" value="true"/>
</plugin>
<root>
<level value="DEBUG"/>
<appender-ref ref="CONSOLE"/>
</root>
</log4j:configuration>
ExpressionFilter supports all fields on logging events and provides a number of
operators. See the tutorial in Chainsaw V2 for a better explanation of the
syntax used by ExpressionFilter (used in Chainsaw to colorize/filter/search
events): http://logging.apache.org/log4j/docs/chainsaw.html
NOTE: The denyallfilter ensures events are dropped if they weren't accepted by
the expressionfilter.
Something appears to be wrong with logfilepatternreceiver in the alpha8
distribution - if you have the alpha7 jars, use them instead for now.
Scott Deboy
COMOTIV SYSTEMS
111 SW Columbia Street Ste. 950
Portland, OR 97201
Telephone: 503.224.7496
Cell: 503.997.1367
Fax: 503.222.0185
[EMAIL PROTECTED]
www.comotivsystems.com
-----Original Message-----
From: Alexey Vorobiev [mailto:[EMAIL PROTECTED]
Sent: Tue 2/14/2006 5:33 AM
To: Log4J Users List
Subject: Re: Help with LogFilePatternReceiver
There is no way i can change config files for the
application.
I've written the program to parse log file using
logfilepatternreciever
but how can I get the log records from it?
Where are they stored during parsing?
Thanks in advance.
On Mon, 13 Feb 2006 07:02:46 -0800
"Scott Deboy" <[EMAIL PROTECTED]> wrote:
> Can you modify the app's log4j config file? If so, add
>a database appender to it.
>
> If not, yes, you can specify both a
>logfilepatternreceive and a database appender in the
>same config file.
>
>
> Scott Deboy
> COMOTIV SYSTEMS
> 111 SW Columbia Street Ste. 950
> Portland, OR 97201
>
> Telephone: 503.224.7496
> Cell: 503.997.1367
>Fax: 503.222.0185
>
> [EMAIL PROTECTED]
>
> www.comotivsystems.com
>
>
>
> -----Original Message-----
>From: Alexey Vorobiev [mailto:[EMAIL PROTECTED]
> Sent: Mon 2/13/2006 5:47 AM
> To: [email protected]
> Subject: Help with LogFilePatternReceiver
>
> Hello,
>
> Could someone help me please?
>
> I need to parse log files with my program and insert
> filtered rows to the Database. I don't have access to
>the
> program that writes this logs but it is using log4j and
>i
> know the format. Is it possible to use
> LogFilePatternReceiver to read information from this log
> file?
> Could someone provide example on how to get events data?
>
> Thanks in advance.
>
> With Regards,
> Alexey Vorobiev
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail:
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>
>
>
With Regards,
Alexey Vorobiev
Tel: +7 (095) 1045136
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