Re: Problem with Copying and Renaming File once it reaches a limit

 Buddha <>
Thu, 09 Aug 2007 10:04:51 -0000
@Lew: I will still wait to hear your thoughts. I untangled this code.
Here it is for anyone who wants to use it :
    import java.text.*;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.regex.*;

    public class DbLog{
        This class will append all the dblogs in a file upto the specified
        After which the contents will be copied into another file, which
will be name
        along with a time stamp. The hencforth updations will continue in
the file name
        specified in the properties file

    static void DbLogAppend(String appendValue){
    System.out.println("Entering the static method in file1");

    static void WriteToFile(String appendValue){
    java.util.Properties props = new java.util.Properties(); url = ClassLoader.getSystemResource("");
    String fileName = (String)props.get("filename");
    String fileMaxSize = (String)props.get("fileMaxSize");
    Long longFileMaxSize =new Long(Long.parseLong(fileMaxSize));
    long longFileMaxSizept = (long)longFileMaxSize;
    String nameRename; file; file2;
    Calendar c = Calendar.getInstance();
    String date1= new String();
    Pattern p = Pattern.compile(":");
    String s = new String();
    Date now = new Date();
    long length;
    BufferedWriter out = null;

    try {
    file = new;
    // Create file if it does not exist
    boolean exist = file.createNewFile();
    if (!exist){
    System.out.println("File already exists.");
    System.out.println("File created successfully.");
    length = file.length();
    if(length == longFileMaxSizept || length > longFileMaxSizept){
    System.out.println("lenght is "+length);
    s = DateFormat.getDateTimeInstance().format(now);
    // Create a matcher with an input string
    Matcher m = p.matcher(s);
    StringBuffer sb = new StringBuffer();
    boolean result = m.find();
    // Loop through and create a new String with the replacements
    while(result) {
        m.appendReplacement(sb, "_");
        result = m.find();
    // Add the last segment of input to the new String
    // File (or directory) with new name
    System.out.println("entering here");
    file2 = new;
    // Rename file (or directory)
    boolean success = file.renameTo(file2);
    if (success) {
        System.out.println("Successfully renamed !");
        boolean success1 = file.delete();
            if (success1){
            System.out.println("Successfully deleted !");
            System.out.println("Could not be delted!");
        // File was not successfully renamed
        System.out.println("renaming failed");

    out = new BufferedWriter(new FileWriter(file, true));
    /* uncomment this for non-windows files*/

    }catch (IOException e) { //end of try
    catch(Exception e1){
    finally {
    }catch(Exception e){

    }catch(Exception e){


The properties file :
#in bytes
To use it :
DbLog.DbLogAppend("Tested for db updateasd");

I would appreciate if someone has tips on improving this code.


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