Custom Log Formatter

Following is the source for a custom log formatter.

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.Formatter;
import java.util.logging.Handler;
import java.util.logging.LogRecord;

public class CustomFormatter extends Formatter {

    private static final DateFormat df = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss.SSS");

    public String format(LogRecord record) {
        StringBuilder builder = new StringBuilder(1000);
        builder.append(df.format(new Date(record.getMillis()))).append(" - ");
        builder.append("[").append(record.getSourceClassName()).append(".");
        builder.append(record.getSourceMethodName()).append("] - ");
        builder.append("").append(record.getLevel()).append(" - ");
        builder.append(formatMessage(record));
        builder.append("\n");
        return builder.toString();
    }

    public String getHead(Handler h) {
        return super.getHead(h);
    }

    public String getTail(Handler h) {
        return super.getTail(h);
    }
}

Following is the way how the log messages will turn up in your log file.

25/03/2014 08:46:17.770 - [com.company.util.memcache.EntityThreadTask.setDataToMemcache] - INFO - thread05 compositekey set time : 5 ms
25/03/2014 08:46:17.781 - [com.company.util.memcache.EntityThreadTask.setDataToMemcache] - INFO - thread03 compositekey set time : 11 ms
25/03/2014 08:46:17.783 - [com.company.util.memcache.EntityThreadTask.setDataToMemcache] - INFO - thread05 compositekey set time : 12 ms
25/03/2014 08:46:17.785 - [com.company.util.memcache.EntityThreadTask.setDataToMemcache] - INFO - thread03 compositekey set time : 4 ms
25/03/2014 08:46:17.787 - [com.company.util.memcache.EntityThreadTask.setDataToMemcache] - INFO - thread05 compositekey set time : 4 ms