Re: set the placeholder in the log4j.properties file
I think for most apps you would want all logs to go to file so you can
see start up exceptions. Only place you might not mind missing this is
when no app specific common code runs before this servlet inits.
So my advice is customize the log4j xml in file system per install.
That way all logs will be in file.
On 12/29/10, Jacob Kjome h...@visi.com wrote:
Log4j will attempt to auto-configure itself by looking for log4j.xml and
then
log4j.properties in the root of the claspath upon the first call to
getLogger().
And yes, this may very well be before your init servlet runs. Note that
the new
configuration (done manually in the init servlet) will have things
configured as
you want them.
There is a solution. You can set system properties
-Dapppath=/my/logging/directory
And, optionally
-Dlog4j.configuration=file:///path/to/log4j.properties
That said, you could just place a minimal config file in the classpath
pointing
all logging to the Console and then let your init servlet configure the
preferred
config file as you are doing. I guess it all depends on how important it is
for
you to get all logging to your preferred file, even logging that occurs
prior to
your init servlet running.
Jake
On 12/27/2010 12:26 AM, maven apache wrote:
Hi:
I want the logs created by log4j put under the app dir,so I set the
placeholder in the log4j.properties:
# chartstdout is set to be a ConsoleAppender.
log4j.appender.chartstdout=org.apache.log4j.ConsoleAppender
log4j.appender.chartstdout.layout=org.apache.log4j.PatternLayout
log4j.appender.chartstdout.layout.ConversionPattern=%-4r [%t] %-5p %l %x -
%m%n
log4j.appender.chartfileout=org.apache.log4j.FileAppender
log4j.appender.chartfileout.File=${apppath}/logs/log.html
log4j.appender.chartfileout.Append=true
log4j.appender.chartfileout.layout=com.test.util.CustomHTMLLayout
log4j.rootLogger=debug, chartstdout,chartfileout
Then in my servlet whose load-on-startup attribute is 0 I set the
property apppath,but it does not work.
It seems that the log4j read the log4j.properties and config the log
before
I modify the property.
public void init() {
DbManager.init();
// log
String context =
getServletConfig().getServletContext().getRealPath(/);
Properties p = new Properties();
p.setProperty(apppath, context);
try {
p.load(InitServlet.class.getResourceAsStream(/log4j.properties));
} catch (IOException e) {
e.printStackTrace();
}
PropertyConfigurator.configure(p);
}
Of course,I can rename the log4j.properties,then the log4j will not find
the
file but I can. However some other libs which I used in my appliction
require log4j also,they need the log4j.properties to generate there logs.
Any ideas?
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Re: set the placeholder in the log4j.properties file
Thanks for all you guys. I will have a try.
2010/12/30 Tushar Kapila tgkp...@gmail.com
I think for most apps you would want all logs to go to file so you can
see start up exceptions. Only place you might not mind missing this is
when no app specific common code runs before this servlet inits.
So my advice is customize the log4j xml in file system per install.
That way all logs will be in file.
On 12/29/10, Jacob Kjome h...@visi.com wrote:
Log4j will attempt to auto-configure itself by looking for log4j.xml
and
then
log4j.properties in the root of the claspath upon the first call to
getLogger().
And yes, this may very well be before your init servlet runs. Note that
the new
configuration (done manually in the init servlet) will have things
configured as
you want them.
There is a solution. You can set system properties
-Dapppath=/my/logging/directory
And, optionally
-Dlog4j.configuration=file:///path/to/log4j.properties
That said, you could just place a minimal config file in the classpath
pointing
all logging to the Console and then let your init servlet configure the
preferred
config file as you are doing. I guess it all depends on how important it
is
for
you to get all logging to your preferred file, even logging that occurs
prior to
your init servlet running.
Jake
On 12/27/2010 12:26 AM, maven apache wrote:
Hi:
I want the logs created by log4j put under the app dir,so I set the
placeholder in the log4j.properties:
# chartstdout is set to be a ConsoleAppender.
log4j.appender.chartstdout=org.apache.log4j.ConsoleAppender
log4j.appender.chartstdout.layout=org.apache.log4j.PatternLayout
log4j.appender.chartstdout.layout.ConversionPattern=%-4r [%t] %-5p %l %x
-
%m%n
log4j.appender.chartfileout=org.apache.log4j.FileAppender
log4j.appender.chartfileout.File=${apppath}/logs/log.html
log4j.appender.chartfileout.Append=true
log4j.appender.chartfileout.layout=com.test.util.CustomHTMLLayout
log4j.rootLogger=debug, chartstdout,chartfileout
Then in my servlet whose load-on-startup attribute is 0 I set the
property apppath,but it does not work.
It seems that the log4j read the log4j.properties and config the log
before
I modify the property.
public void init() {
DbManager.init();
// log
String context =
getServletConfig().getServletContext().getRealPath(/);
Properties p = new Properties();
p.setProperty(apppath, context);
try {
p.load(InitServlet.class.getResourceAsStream(/log4j.properties));
} catch (IOException e) {
e.printStackTrace();
}
PropertyConfigurator.configure(p);
}
Of course,I can rename the log4j.properties,then the log4j will not find
the
file but I can. However some other libs which I used in my appliction
require log4j also,they need the log4j.properties to generate there
logs.
Any ideas?
-
To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org
For additional commands, e-mail: log4j-user-h...@logging.apache.org
--
Sent from my mobile device
-
To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org
For additional commands, e-mail: log4j-user-h...@logging.apache.org
Re: log4j to log to different files for each JVM instance
Use placeholders in the config file and set system properties on the command line starting the JVM process. Jake On 12/29/2010 11:19 PM, lalpop kumar wrote: how can I configure log4j to log to different files for each JVM instance in the same host? - To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
