Inclue client information

[Sriram Sundararajan <sr...@gmail.com>]

Hi,
     I am using Log4j for a web oriented project, where i have to log the
messages with logged in user id and his name.
    Each and every time i don't want to pass the userid and username from
the session like below.
    logger.debug("<userid>","<username>","<messages.....>");//i don't want
to do this

   I want to use something similar to below statement. But in the log file i
have to see the userid and user name

    logger.debug("<messages.....>");//i want to do this

  I tried to use MDC and NDC, but for each and every call i need to set this
value before making a call....
   MDC.put("userid',<....>);
   MDC.put("username',<....>);

 Only for one time i want to set this value, after that i don't want to do
that. If you know any design patterns for this it will be of great help.

regards
sri

Re: Inclue client information

[Maarten Bosteels <mb...@gmail.com>]

If you are using spring MVC you could use an interceptor like below.
Of course you could retrieve other information (eg. username) from the
session or the request.
If your not using Spring MVC you could so something similar with a servlet
filter

http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/Filter.html

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
import org.apache.log4j.NDC;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * This interceptor pushes the remote address in the NDC
 */
public class LogRemoteAddressInterceptor extends HandlerInterceptorAdapter {

  public boolean preHandle(HttpServletRequest request, HttpServletResponse
response, Object handler) {
    String remoteAddr = getRemoteAddress(request);
    NDC.push(remoteAddr);
    return true;
  }

  public void afterCompletion(HttpServletRequest request,
HttpServletResponse response, Object handler, Exception ex)  {
    NDC.pop();
  }
}

  public static String getRemoteAddress (HttpServletRequest request) {
    String remoteAddr = request.getHeader("X-Forwarded-For");
    if (remoteAddr == null)
      remoteAddr = request.getRemoteAddr();
    return remoteAddr;
  }




On 2/22/07, James Stauffer <st...@gmail.com> wrote:
>
> In something like a servlet engine one thread usually handles one user
> request until that request is done.  Then you can set the username in
> the MDC and it will be logged correctly.  How is your application
> different?  Does one thread handle multiple users at the same time?
>
> On 2/21/07, Sriram Sundararajan <sr...@gmail.com> wrote:
> > Hi,
> >      I am using Log4j for a web oriented project, where i have to log
> the
> > messages with logged in user id and his name.
> >     Each and every time i don't want to pass the userid and username
> from
> > the session like below.
> >     logger.debug("<userid>","<username>","<messages.....>");//i don't
> want
> > to do this
> >
> >    I want to use something similar to below statement. But in the log
> file i
> > have to see the userid and user name
> >
> >     logger.debug("<messages.....>");//i want to do this
> >
> >   I tried to use MDC and NDC, but for each and every call i need to set
> this
> > value before making a call....
> >    MDC.put("userid',<....>);
> >    MDC.put("username',<....>);
> >
> >  Only for one time i want to set this value, after that i don't want to
> do
> > that. If you know any design patterns for this it will be of great help.
> >
> > regards
> > sri
> >
>
>
> --
> James Stauffer        http://www.geocities.com/stauffer_james/
> Are you good? Take the test at http://www.livingwaters.com/good/
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: log4j-user-unsubscribe@logging.apache.org
> For additional commands, e-mail: log4j-user-help@logging.apache.org
>
>

Re: Inclue client information

[James Stauffer <st...@gmail.com>]

In something like a servlet engine one thread usually handles one user
request until that request is done.  Then you can set the username in
the MDC and it will be logged correctly.  How is your application
different?  Does one thread handle multiple users at the same time?

On 2/21/07, Sriram Sundararajan <sr...@gmail.com> wrote:
> Hi,
>      I am using Log4j for a web oriented project, where i have to log the
> messages with logged in user id and his name.
>     Each and every time i don't want to pass the userid and username from
> the session like below.
>     logger.debug("<userid>","<username>","<messages.....>");//i don't want
> to do this
>
>    I want to use something similar to below statement. But in the log file i
> have to see the userid and user name
>
>     logger.debug("<messages.....>");//i want to do this
>
>   I tried to use MDC and NDC, but for each and every call i need to set this
> value before making a call....
>    MDC.put("userid',<....>);
>    MDC.put("username',<....>);
>
>  Only for one time i want to set this value, after that i don't want to do
> that. If you know any design patterns for this it will be of great help.
>
> regards
> sri
>


-- 
James Stauffer        http://www.geocities.com/stauffer_james/
Are you good? Take the test at http://www.livingwaters.com/good/

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