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comp.lang.ruby

[ANN] win32-changenotify 0.3.0

djberg96

1/25/2005 11:19:00 PM

Hi all,

The Win32Utils Team is proud to annouce win32-changenotify 0.3.0

What is it?
===========
An interface for monitoring file and/or directory changes on the Win32
platform.

Synopsis
========
require "win32/changenotify"
include Win32

# Wait for any writes to files in the C:\ drive.
filter = ChangeNotify::LAST_WRITE
cn = ChangeNotify.new("C:\\",true,filter)
cn.wait{ |s|
puts "Something changed"
puts "File: " + s.file_name
puts "Action: " + s.action
}

What's new?
===========
The interface has been altered so that ChangeNotify#wait will yield a
structure (if a block is given) that provides more detailed information
as to what, exactly, the changes were.

See the documentation for more details.

Where is it?
============
You can find it on the RAA or on the RubyForge project page at
http://www.rubyforge.org/projects/....

Also, I have release a standalone .so file that you can download from
the RubyForge project page if you don't happen to have a compiler. Be
sure to put it under a "win32" toplevel directory somewhere in your
library path.

Many thanks go to Park Heesob (again) for helping me with some sticky C
issues.

Future Plans
============
We are planning on an interface for Change Journals which will either
supplant or replace this package. Keep an eye out. :)
Enjoy!

The Win32Utils Team
3 Answers

Shajith

2/4/2005 9:06:00 PM

0

Thanks for the great work with win32!


On Wed, 26 Jan 2005 08:20:51 +0900, Daniel Berger <djberg96@hotmail.com> wrote:

> require "win32/changenotify"
> include Win32
>
> # Wait for any writes to files in the C:\ drive.
> filter = ChangeNotify::LAST_WRITE
> cn = ChangeNotify.new("C:\\",true,filter)
> cn.wait{ |s|
> puts "Something changed"
> puts "File: " + s.file_name
> puts "Action: " + s.action
> }
>

I tried to run this script, after installing everything. The script
terminates, I make changes to files in C:\\, and nothing happens. What
am I doing wrong? Is there any other doc/sample for
win32-changenotify?

Thanks in advance!
CT

Shajith

2/4/2005 9:49:00 PM

0

> > require "win32/changenotify"
> > include Win32
> >
> > # Wait for any writes to files in the C:\ drive.
> > filter = ChangeNotify::LAST_WRITE
> > cn = ChangeNotify.new("C:\\",true,filter)
> > cn.wait{ |s|
> > puts "Something changed"
> > puts "File: " + s.file_name
> > puts "Action: " + s.action
> > }
> >

Okay, I got this working, kinda, after mucking around a bit. What I
want is a daemon-like thingie which will give me notifications when
stuff inside a partocular directory changes. Is it advisable to wrap
the cn.wait call inside an infinite loop, for this? Are there any
consequences for that?
I did something like this:

while true
cn.wait{ |s|
puts "Something changed"
puts "File: " + s.file_name
puts "Action: " + s.action
}
end

This does detect file changes, but I donot understand how I get away
without calling cn.reset. Is that invoked when the block is called?

Thanks!
CT

djberg96

2/4/2005 10:24:00 PM

0

CT wrote:
> > > require "win32/changenotify"
> > > include Win32
> > >
> > > # Wait for any writes to files in the C:\ drive.
> > > filter = ChangeNotify::LAST_WRITE
> > > cn = ChangeNotify.new("C:\\",true,filter)
> > > cn.wait{ |s|
> > > puts "Something changed"
> > > puts "File: " + s.file_name
> > > puts "Action: " + s.action
> > > }
> > >
>
> Okay, I got this working, kinda, after mucking around a bit. What I
> want is a daemon-like thingie which will give me notifications when
> stuff inside a partocular directory changes. Is it advisable to wrap
> the cn.wait call inside an infinite loop, for this? Are there any
> consequences for that?
> I did something like this:
>
> while true
> cn.wait{ |s|
> puts "Something changed"
> puts "File: " + s.file_name
> puts "Action: " + s.action
> }
> end
>
> This does detect file changes, but I donot understand how I get away
> without calling cn.reset. Is that invoked when the block is called?
>
> Thanks!
> CT

Hi CT,

Whoops, this did show up on Google Groups after all. Ugh - still
getting used to the new interface.

Anyway, you inadvertantly discovered a bug, which I have fixed and
uploaded to RubyForge. Please download win32-changenotify 0.3.1 and
try again. You should *not* have to wrap the cn.wait call in a "while
true" block. It should wait indefinitely if no timeout is specified.

Thanks much!

Regards,

PS - Park is working on win32-changejournal as we speak, which will
probably supplant the win32-changenotify package.