win32utils devel - Apr 2005 - win32-changejournal modification

Hi all,

Should we make the same change for win32-changejournal
that we made for win32-changenotify (i.e yield an
array of structs rather than a single struct)?

Any objections?

Dan

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Daniel Berger wrote:
> Hi all,
> 
> Should we make the same change for win32-changejournal
> that we made for win32-changenotify (i.e yield an
> array of structs rather than a single struct)?
> 
> Any objections?
No objections....but i can''t say i know what either of those are off
the
top of my head...

Zach

> -----Original Message-----
> From: win32utils-devel-bounces@rubyforge.org 
> [mailto:win32utils-devel-bounces@rubyforge.org] On Behalf Of 
> Zach Dennis
> Sent: Wednesday, April 20, 2005 11:53 PM
> To: Development and ideas for win32utils projects
> Subject: Re: [Win32utils-devel] win32-changejournal modification
> 
> 
> Daniel Berger wrote:
> > Hi all,
> > 
> > Should we make the same change for win32-changejournal
> > that we made for win32-changenotify (i.e yield an
> > array of structs rather than a single struct)?
> > 
> > Any objections?
> 
> No objections....but i can''t say i know what either of those 
> are off the 
> top of my head...
> 
> Zach
They''re directory/file monitors.  For example:

flags = ChangeNotify::FILE_NAME | ChangeNotify::DIR_NAME
flags |= ChangeNotify::LAST_WRITE

cn = ChangeNotify.new("c:\\",false,flags)

# Wait up to 5 minutes for a notification
rv = cn.wait(300){ |arr|
   arr.each { |s|
      puts "Something changed"
      puts "File: " + s.file_name
      puts "Action: " + s.action
   }
}

Every time there''s a change to a file or directory under C:\ a
notification is sent.  In some cases, multiple notifications can occur
on a single event, which is why we altered it to yield an array of
structs, rather than a single struct.  Using the above example, if I
change "C:\err.txt" to "C:\foo.txt" I get this:

Something changed
File: err.txt
Action: renamed old name
Something changed
File: foo.txt
Action: renamed new name

You can see there we actually got 2 notifications.  Previously, you
would only have been able to get one.

HTH.

Dan

Berger, Daniel wrote:
> Using the above example, if I
> change "C:\err.txt" to "C:\foo.txt" I get this:
> 
> Something changed
> File: err.txt
> Action: renamed old name
> Something changed
> File: foo.txt
> Action: renamed new name
> 
> You can see there we actually got 2 notifications.  Previously, you
> would only have been able to get one.
Ah, it makes good sense now. I would go for array of structs then, 
otherwise you might lose something in the shuffle!! Thanks for explaining,

Zach