Darshan,
At 08:36 07.03.2001 -0800, Darshan Mangani wrote:
>Hi folks,
>
>I am a new user of Log4J ver 1.0.4.
>
>I have come on board to an existing
>implementation/project that uses Log4J for logging. I
>have a requirement to log to a database. I have taken
>a look at the 2 JDBC appenders that have been
>contributed but unfortunately, I have to work with the
>existing framework (we have our own DB connection
>pooling code, DB access wrappers ..etc..)
>
>My questions are:
>
>(1) How can I access each piece of the LoggingEvent
>before or after it gets converted to a string? I use
>PatternLayout and the format specifiers are more than
>enough for my needs. I need to get at these so that
>each piece of it can be persisted in a DB column of a
>table. Am I restricted to calling layout.format() in
>my appender and then parsing thro' this myself? What
>would you suggest?
See org.apache.log4j.spi.LoggingEvent class.
>(2) Is logging done via separate threads? i.e. when my
>application calls someCategory.info() or other logging
>methods, does the log message immediately get output
>or is it handed off to a background thread? I think
>AsyncAppender does this part of it, but I am unsure
>about how to configure this via XML config files since
>we use DOMConfigurator extensively. Also, how does
>AsyncAppender know how to log to console as well as to
>a file (right now, we have this setup)?
No, logging does not occur through a separate thread except if you use AsyncAppender.
Here is a sample config file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration configDebug="true">
<appender name="ASYNC" class="org.apache.log4j.AsyncAppender">
<appender-ref ref="TEMP"/>
<appender-ref ref="CONSOLE"/>
</appender>
<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
</layout>
</appender>
<appender name="TEMP" class="org.apache.log4j.FileAppender">
<param name="File" value="temp"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
</layout>
</appender>
<root>
<priority value="debug"/>
<appender-ref ref="ASYNC"/>
</root>
</log4j:configuration>
Hope this helps, Ceki
----
Ceki Gülcü Web: http://qos.ch
av. de Rumine 5 email: [EMAIL PROTECTED] (preferred)
CH-1005 Lausanne [EMAIL PROTECTED]
Switzerland Tel: ++41 21 351 23 15
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