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Thread: unable to run log code

  1. #1
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    Default unable to run log code

    while trying to run the log code it is showing org.apache.log4j.PropertyConfigurator...
    i am unable to trace out the error.
    here i am sending the code.
    package logexmaples;
     
    import java.io.*;
    import java.text.*;
    import java.util.*;
    import java.net.URL;
     
    import org.apache.log4j.*;
    //import org.apache.log4j.properties;
    import org.apache.log4j.PropertyConfigurator.*;
     
    @SuppressWarnings("unused")
    public class SimpleLog2
    {
         private static String logFile = "/msglog.txt";
         private final static DateFormat df = new SimpleDateFormat ("yyyy.MM.dd  hh:mm:ss ");
         private SimpleLog2()
            {
     
            }
         public static void setLogFilename(String filename)
            {
                logFile = filename;
                new File(filename).delete();
                try
                  {
                       write("LOG file : " + filename);
                  }
                catch (Exception e)
                  { 
                       System.out.println(stack2string(e));
                  }
            }
         public static void write(String msg)
            {
               write(logFile, msg);
            }
        public static void write(Exception e)
            {
               write(logFile, stack2string(e));
            }
       public static void write(String file, String msg)
            {
               try
                 {
                     Date now = new Date();
                     String currentTime = SimpleLog2.df.format(now); 
                     FileWriter aWriter = new FileWriter(file, true);
                     aWriter.write(currentTime + " " + msg+ System.getProperty("line.separator"));
                     System.out.println(currentTime + " " + msg);
                     aWriter.flush();
                     aWriter.close();
                  }
                catch (Exception e)
                  {
                     System.out.println(stack2string(e));
                  }
             }
        private static String stack2string(Exception e)
             {
                try 
                  {
                     StringWriter sw = new StringWriter();
                     PrintWriter pw = new PrintWriter(sw);
                     e.printStackTrace(pw);
                     return "------\r\n" + sw.toString() + "------\r\n";
                  }
                catch(Exception e2)
                  {
                     return "bad stack2string";
                  }
              }
    }
    ---------any help
    Last edited by helloworld922; April 2nd, 2010 at 01:07 PM. Reason: Please use [code] tags!


  2. #2
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    Default Re: unable to run log code

    can u post the exact errors and also highlight the line where error occurs

  3. #3
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    Default Re: unable to run log code

    i am getting this error.....plz check it and reply me

    type Exception report

    message

    description The server encountered an internal error () that prevented it from fulfilling this request.

    exception

    javax.servlet.ServletException: Servlet.init() for servlet LoggerServlet threw exception
    org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:117)
    org.apache.catalina.connector.CoyoteAdapter.servic e(CoyoteAdapter.java:151)
    org.apache.coyote.http11.Http11Processor.process(H ttp11Processor.java:874)
    org.apache.coyote.http11.Http11BaseProtocol$Http11 ConnectionHandler.processConnection(Http11BaseProt ocol.java:665)
    org.apache.tomcat.util.net.PoolTcpEndpoint.process Socket(PoolTcpEndpoint.java:528)
    org.apache.tomcat.util.net.LeaderFollowerWorkerThr ead.runIt(LeaderFollowerWorkerThread.java:81)
    org.apache.tomcat.util.threads.ThreadPool$ControlR unnable.run(ThreadPool.java:689)
    java.lang.Thread.run(Unknown Source)


    root cause

    java.lang.NoClassDefFoundError: org/apache/log4j/PropertyConfigurator
    logexmaples.LoggerServlet.init(LoggerServlet.java: 22)
    javax.servlet.GenericServlet.init(GenericServlet.j ava:212)
    org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:117)
    org.apache.catalina.connector.CoyoteAdapter.servic e(CoyoteAdapter.java:151)
    org.apache.coyote.http11.Http11Processor.process(H ttp11Processor.java:874)
    org.apache.coyote.http11.Http11BaseProtocol$Http11 ConnectionHandler.processConnection(Http11BaseProt ocol.java:665)
    org.apache.tomcat.util.net.PoolTcpEndpoint.process Socket(PoolTcpEndpoint.java:528)
    org.apache.tomcat.util.net.LeaderFollowerWorkerThr ead.runIt(LeaderFollowerWorkerThread.java:81)
    org.apache.tomcat.util.threads.ThreadPool$ControlR unnable.run(ThreadPool.java:689)
    java.lang.Thread.run(Unknown Source)


    root cause

    java.lang.ClassNotFoundException: org.apache.log4j.PropertyConfigurator
    org.apache.catalina.loader.WebappClassLoader.loadC lass(WebappClassLoader.java:1362)
    org.apache.catalina.loader.WebappClassLoader.loadC lass(WebappClassLoader.java:1208)
    logexmaples.LoggerServlet.init(LoggerServlet.java: 22)
    javax.servlet.GenericServlet.init(GenericServlet.j ava:212)
    org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:117)
    org.apache.catalina.connector.CoyoteAdapter.servic e(CoyoteAdapter.java:151)
    org.apache.coyote.http11.Http11Processor.process(H ttp11Processor.java:874)
    org.apache.coyote.http11.Http11BaseProtocol$Http11 ConnectionHandler.processConnection(Http11BaseProt ocol.java:665)
    org.apache.tomcat.util.net.PoolTcpEndpoint.process Socket(PoolTcpEndpoint.java:528)
    org.apache.tomcat.util.net.LeaderFollowerWorkerThr ead.runIt(LeaderFollowerWorkerThread.java:81)
    org.apache.tomcat.util.threads.ThreadPool$ControlR unnable.run(ThreadPool.java:689)
    java.lang.Thread.run(Unknown Source)


    note The full stack trace of the root cause is available in the Apache Tomcat/5.5.25 logs.

  4. #4
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    Default Re: unable to run log code

    this is because your log4j jar is not available on the class path. Please ensure its in your tomcats lib folder

  5. #5
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    Default Re: unable to run log code

    thank u kumar...its wrkng fine....
    can u help in another doubt...

  6. #6
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    Default Re: unable to run log code

    yeah go ahead and ask the question mate

    vinod

  7. #7
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    Default Re: unable to run log code

    i am not aware of logs....but i was kept into new project which should contain logs.
    i'll describe about my project which is done on jsp,servlets,core java,html....
    its a web application contains 2 modules...
    1) Admin ---- can login and view what are the modifications done by the user i.e login,registration,update and
    logout timinings
    2) User ----- can login and do registration and can do dml,ddl operations.

    my query is log file should be created and it should contain whatever user do i.e login,logout,ddl and dml
    operations .

    i tried some examples regarding logs and log4j....but i am unable to get the answer for my project i.e where to write log file and how to call that log file in coding part i.e in servlet code...

    can u help me out... reg. this i tried so much .......

  8. #8
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    Default Re: unable to run log code

    hi

    have attached two files which shows how to use it

    logUnit.java - this class is the master class that needs to be called in all your programs
    to use the logger

    it has two methods info and err which is used to sysout messages/ errors respectively


    admin.java - shows you how to call the logUnit class

    this should hopefully help


    thanks
    vinod
    Attached Files Attached Files

  9. The Following User Says Thank You to vkumar23 For This Useful Post:

    Json (April 6th, 2010)

  10. #9
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    Default Re: unable to run log code

    thanx i'll try it...thanx a lot...bye

  11. #10
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    Default Re: unable to run log code

    hi,
    gud mrng....i tried to run the program on the server but it is showing the output of another program which is previously runned...may i knw whts the prob.

  12. #11
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    Default Re: unable to run log code

    i m running SimpleLog2 on server it is going to other program which is lastly runned on the server....may i know why it is showing like that.

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