Hi all,
i'm trying to use NDC in my servlets.
I have a logger wrapper[PvnLogger.java] with push()
and pop() methods besides logger methods. The sample
Servlet[sampleServlet.java] makes use of push and pop.
Attached are the files. I'm not sure if i'm doing the
correct thing. Any suggestion will help me greatly.
Thanks,
Krishna
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import org.apache.log4j.*;
import org.apache.log4j.NDC;
/**
* Wrapper class for log4j. Performs basic logging.
*/
public class PvnLogger {
/**
* Class name
*/
private static final String className = PvnLogger.class.getName();
/**
* Logger object
*/
private static Logger log = Logger.getLogger(className);
/**
* Default Constructor
*/
public PvnLogger() {
}
public static void push(String message) {
NDC.push(message);
}
public static void pop() {
NDC.pop();
}
public static void debug(Class c, Object message) {
Category.getInstance(c).log(className, Priority.DEBUG, message, null);
}
//more methods here...
//.
//.
//.
}
import javax.servlet.*;
import javax.servlet.http.*;
public class sampleServlet extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, java.io.IOException {
response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter();
Class c = sampleServlet.class;
HttpSession session = request.getSession();
if( session != null )
PvnLogger.push("#### Session ID: ####" + session.getId());
try{
PvnLogger.debug(c,"this is a test");
//do something here
}catch(Exception e){
//do something here
}
finally{
if(session != null)
PvnLogger.pop();
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
processRequest(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
processRequest(request, response);
}
}
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