a program process a constantly updated file

From	www <xsli2@yahoo.com>
Newsgroups	comp.lang.java.programmer
Subject	a program process a constantly updated file
Date	2011-06-17 10:15 -0700
Organization	http://groups.google.com
Message-ID	<885b80e6-864a-4076-b559-65b2452ffe9f@ct4g2000vbb.googlegroups.com> (permalink)

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Dear All:

I need to write a Java program(since I am a Java developer) to do the
following task:

A commercial program sends out information to its log file once in a
while. ANYTIME when a new line is inserted to the bottom of the log
file, I want my Java program IMMEDIATELY(10~20 seconds delay is
acceptable) read that new line, process it and do some other stuff
based on the string in the new line. The commercial program is
constantly running in Windows 7 24 hours a day 7 days a week. So my
Java program needs always be running and waiting for any new line
shows up in the log file.

I have never developed such a Java program that runs all the time and
wait for the update of a file. I can do the regular Java IO stuff. But
I hate every second let the Java program open the log file and read it
from the top to the bottom. That will occupy the computer CPU. I am
wondering if there are some smart tools for this kind of purpose.

Thank you very much.

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a program process a constantly updated file www <xsli2@yahoo.com> - 2011-06-17 10:15 -0700
  Re: a program process a constantly updated file www <xsli2@yahoo.com> - 2011-06-17 10:43 -0700
  Re: a program process a constantly updated file Jeff Higgins <jeff@invalid.invalid> - 2011-06-17 13:51 -0400
    Re: a program process a constantly updated file Jeff Higgins <jeff@invalid.invalid> - 2011-06-17 14:07 -0400
      Re: a program process a constantly updated file www <xsli2@yahoo.com> - 2011-06-18 17:40 -0700
  Re: a program process a constantly updated file Roedy Green <see_website@mindprod.com.invalid> - 2011-06-19 11:12 -0700

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