Write a log file with a size limit

This tip provides code for creating a log file. When the file reaches a certain size, a new file will be created and the existing file will be renamed.

The method below creates a log file. If the log file reaches a certain size, the method will rename the existing file and create a new one.

usage:
writeLogFile2(hLogin, hNow, "User " + hLogin + 
" Logged In", "Logged In");




public void writeLogFile2(String strWho, 
String strWhen, String strWhat, String strLeadNumber) 
     {
      String strFile;
      String gDate = String.valueOf(emcU.getDate());
      try {
           strFile = "c:\java\insRF" + strWho + "Log.txt";
              //File file = new File("c:\java\insRF" + strWho 
+ "Log.txt");
              File file = new File(strFile);
              
              long length = file.length();
              if(length > 5000)
                {                  
                  File fileOLD = new File(strFile);
                  File file2New = new File("c:\java\insRF" 
+ strWho + "Log" + gDate + ".txt");
                  boolean success = file.renameTo(file2New);
                  
                  BufferedWriter out = new BufferedWriter
(new FileWriter(strFile, true)); 
                  out.write("" + strWho + " at " + strWhen + " 
Clicked on: " + strWhat + " Action for Lead Number: "
 + strLeadNumber);
                  out.write(" ¥ ");
                  out.close();
                 }
                  else
                          {
                           BufferedWriter out = 
new BufferedWriter(new FileWriter(strFile, true)); 
                              out.write("" + strWho + " at " + 
strWhen + " Clicked on: " + strWhat + " Action for
 Lead Number: " + strLeadNumber);
                              out.write(" ¥ ");
                              out.close();
                           }
            }
            catch (Exception e) 
                  {
                    e.printStackTrace();
                   }
}

Do you have comments on this tip? Let us know.

This tip was submitted to the SearchDomino.com tip exchange by member Mike Marcavage. Please let others know how useful it is via the rating scale below. Do you have a useful Notes/Domino tip or code to share? Submit it to our bimonthly tip contest and you could win a prize and a spot in our Hall of Fame.

This was first published in July 2005

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