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Posted to users@tomcat.apache.org by James Adams <ja...@ucar.edu> on 2002/03/20 00:59:49 UTC
Log4j initialization problem
Hello,
I am having the problem of Tomcat initializing/creating my Log4j log
files in whatever directory that Tomcat is started from. In other words
if I am currently at directory /kung/foo when I issue the command
/etc/init.d/tomcat start, then my log files will be created under
/kung/foo instead of under the /path/to/webapp directory, which is where
I thought that they should be created.
I have the following WEB-INF/classes/log4j.properties file:
--------------------
# Set root category priority to DEBUG and its only appender to A1.
log4j.rootCategory=DEBUG, A1
# A1 is set to be a RollingFileAppender.
log4j.appender.A1=org.apache.log4j.RollingFileAppender
log4j.appender.A1.File=LogMessages-trajview.txt
log4j.appender.A1.MaxFileSize=500KB
# Keep one backup file
log4j.appender.A1.MaxBackupIndex=2
# A1 uses PatternLayout.
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%5p %d (%F:%L) - %m%n
---------------------
The log4j stuff is being initialized/configured by a servlet which has
the following init() method:
-------------------
public void init()
{
// gets the base directory to use, from the web application's
"context"
String prefix = getServletContext().getRealPath("/");
// this looks in the web.xml for the initialization file
parameter
// which points to log4j.properties
String file = getInitParameter("log4j-init-file");
// if the log4j-init-file is not set, then no point in trying
if (file != null)
{
// apply the configuration specified in the initialization
file
PropertyConfigurator.configure(prefix + file);
}
}
------------------
The above mentioned Log4j initialization servlet is being called at
loadup time by virtue of the following entry in my web.xml:
-----------------
<servlet>
<servlet-name>log4j-init</servlet-name>
<servlet-class>myapp.servlet.Log4jInit</servlet-class>
<init-param>
<param-name>log4j-init-file</param-name>
<param-value>WEB-INF/classes/log4j.properties</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
-----------------
Because I have three separate webapps which should all have their own
log files I would like to have the log files created in the separate
webapp directories, or perhaps better yet in a logs subdirectory under
each webapp directory. For example if a webapp is under
/var/tomcat/webappps/myapp then I would like for the log file to be
created as /var/tomcat/webapps/myapp/LogMessages.txt or as
/var/tomcat/webapps/myapp/logs/LogMessages.txt. How can I get this to
happen ? Should I make a change to a log4j.properties entry, or perhaps
I'm making an error in my log4j initialization servlet's init() method
by referencing the wrong path in the getRealPath() call ?
Any suggestions will be appreciated. Thanks in advance.
-James
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Re: Log4j initialization problem
Posted by D Henton <he...@charter.net>.
Do I read you conf file to be a relative path , how about setting as fully
defined from the root eg /var/fred/log.txt
----- Original Message -----
From: "James Adams" <ja...@ucar.edu>
To: <to...@jakarta.apache.org>
Sent: Tuesday, March 19, 2002 5:59 PM
Subject: Log4j initialization problem
> Hello,
>
> I am having the problem of Tomcat initializing/creating my Log4j log
> files in whatever directory that Tomcat is started from. In other words
> if I am currently at directory /kung/foo when I issue the command
> /etc/init.d/tomcat start, then my log files will be created under
> /kung/foo instead of under the /path/to/webapp directory, which is where
> I thought that they should be created.
>
> I have the following WEB-INF/classes/log4j.properties file:
>
> --------------------
> # Set root category priority to DEBUG and its only appender to A1.
> log4j.rootCategory=DEBUG, A1
>
> # A1 is set to be a RollingFileAppender.
> log4j.appender.A1=org.apache.log4j.RollingFileAppender
>
> log4j.appender.A1.File=LogMessages-trajview.txt
> log4j.appender.A1.MaxFileSize=500KB
>
> # Keep one backup file
> log4j.appender.A1.MaxBackupIndex=2
>
> # A1 uses PatternLayout.
> log4j.appender.A1.layout=org.apache.log4j.PatternLayout
> log4j.appender.A1.layout.ConversionPattern=%5p %d (%F:%L) - %m%n
> ---------------------
>
>
> The log4j stuff is being initialized/configured by a servlet which has
> the following init() method:
>
> -------------------
> public void init()
> {
> // gets the base directory to use, from the web application's
> "context"
> String prefix = getServletContext().getRealPath("/");
>
> // this looks in the web.xml for the initialization file
> parameter
> // which points to log4j.properties
> String file = getInitParameter("log4j-init-file");
>
> // if the log4j-init-file is not set, then no point in trying
> if (file != null)
> {
> // apply the configuration specified in the initialization
> file
> PropertyConfigurator.configure(prefix + file);
> }
> }
> ------------------
>
>
> The above mentioned Log4j initialization servlet is being called at
> loadup time by virtue of the following entry in my web.xml:
>
> -----------------
> <servlet>
> <servlet-name>log4j-init</servlet-name>
> <servlet-class>myapp.servlet.Log4jInit</servlet-class>
> <init-param>
> <param-name>log4j-init-file</param-name>
> <param-value>WEB-INF/classes/log4j.properties</param-value>
> </init-param>
> <load-on-startup>1</load-on-startup>
> </servlet>
> -----------------
>
>
> Because I have three separate webapps which should all have their own
> log files I would like to have the log files created in the separate
> webapp directories, or perhaps better yet in a logs subdirectory under
> each webapp directory. For example if a webapp is under
> /var/tomcat/webappps/myapp then I would like for the log file to be
> created as /var/tomcat/webapps/myapp/LogMessages.txt or as
> /var/tomcat/webapps/myapp/logs/LogMessages.txt. How can I get this to
> happen ? Should I make a change to a log4j.properties entry, or perhaps
> I'm making an error in my log4j initialization servlet's init() method
> by referencing the wrong path in the getRealPath() call ?
>
> Any suggestions will be appreciated. Thanks in advance.
>
>
> -James
>
>
> --
> To unsubscribe: <ma...@jakarta.apache.org>
> For additional commands: <ma...@jakarta.apache.org>
> Troubles with the list: <ma...@jakarta.apache.org>
>
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Re: Log4j initialization problem
Posted by Sriram N <sr...@yahoo.com>.
Hello,
I don't have access to my computer right now, but here's roughly what I do to
use log4J within my Servlet 2.3 API compliant webapps.
1. Create a properties file called log4j.properties
2. Place this in WEB-INF folder.
3. Write a ContextListener and in the contectInitialized method, access the
servlet context. Make sure you place this Listener implementation along with
your other classes and that you add an entry for it in web.xml
4. Ask the servlet context to get the following resource as a stream
e.g. InputStream is =
servletContext.getResourceAsStream("/WEB-INF/log4j.properties");
5. Create a properties file that'll initialize with this property file.
Properties properties = new Properties();
properites.load(is);
is.close();
6. Now pass this newly initialized properties object to the
PropertyConfigurator...
That's it.
Sriram
--- James Adams <ja...@ucar.edu> wrote:
> Hello,
>
> I am having the problem of Tomcat initializing/creating my Log4j log
> files in whatever directory that Tomcat is started from. In other words
> if I am currently at directory /kung/foo when I issue the command
> /etc/init.d/tomcat start, then my log files will be created under
> /kung/foo instead of under the /path/to/webapp directory, which is where
> I thought that they should be created.
>
> I have the following WEB-INF/classes/log4j.properties file:
>
> --------------------
> # Set root category priority to DEBUG and its only appender to A1.
> log4j.rootCategory=DEBUG, A1
>
> # A1 is set to be a RollingFileAppender.
> log4j.appender.A1=org.apache.log4j.RollingFileAppender
>
> log4j.appender.A1.File=LogMessages-trajview.txt
> log4j.appender.A1.MaxFileSize=500KB
>
> # Keep one backup file
> log4j.appender.A1.MaxBackupIndex=2
>
> # A1 uses PatternLayout.
> log4j.appender.A1.layout=org.apache.log4j.PatternLayout
> log4j.appender.A1.layout.ConversionPattern=%5p %d (%F:%L) - %m%n
> ---------------------
>
>
> The log4j stuff is being initialized/configured by a servlet which has
> the following init() method:
>
> -------------------
> public void init()
> {
> // gets the base directory to use, from the web application's
> "context"
> String prefix = getServletContext().getRealPath("/");
>
> // this looks in the web.xml for the initialization file
> parameter
> // which points to log4j.properties
> String file = getInitParameter("log4j-init-file");
>
> // if the log4j-init-file is not set, then no point in trying
> if (file != null)
> {
> // apply the configuration specified in the initialization
> file
> PropertyConfigurator.configure(prefix + file);
> }
> }
> ------------------
>
>
> The above mentioned Log4j initialization servlet is being called at
> loadup time by virtue of the following entry in my web.xml:
>
> -----------------
> <servlet>
> <servlet-name>log4j-init</servlet-name>
> <servlet-class>myapp.servlet.Log4jInit</servlet-class>
> <init-param>
> <param-name>log4j-init-file</param-name>
> <param-value>WEB-INF/classes/log4j.properties</param-value>
> </init-param>
> <load-on-startup>1</load-on-startup>
> </servlet>
> -----------------
>
>
> Because I have three separate webapps which should all have their own
> log files I would like to have the log files created in the separate
> webapp directories, or perhaps better yet in a logs subdirectory under
> each webapp directory. For example if a webapp is under
> /var/tomcat/webappps/myapp then I would like for the log file to be
> created as /var/tomcat/webapps/myapp/LogMessages.txt or as
> /var/tomcat/webapps/myapp/logs/LogMessages.txt. How can I get this to
> happen ? Should I make a change to a log4j.properties entry, or perhaps
> I'm making an error in my log4j initialization servlet's init() method
> by referencing the wrong path in the getRealPath() call ?
>
> Any suggestions will be appreciated. Thanks in advance.
>
>
> -James
>
>
> --
> To unsubscribe: <ma...@jakarta.apache.org>
> For additional commands: <ma...@jakarta.apache.org>
> Troubles with the list: <ma...@jakarta.apache.org>
>
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