[Pdx-pm] Accessing File::Monitor attribute
Robert Buels
rmb32 at cornell.edu
Tue Aug 11 15:31:04 PDT 2009
Not such great documentation. From what I can tell, watch() returns a
monitoring object, and you call mtime on that.
Here's a demo. run it like demo.pl filename to watch a file for
modifications for 10 seconds.
Rob
#!/usr/bin/perl
use strict;
use File::Monitor;
use File::Monitor::Object;
my $monitor = File::Monitor->new();
my $filewatcher = $monitor->watch($ARGV[0]);
print $filewatcher->mtime, "\n";
my $n = 10;
while($n--) {
$monitor->scan;
sleep 1;
print $filewatcher->mtime, "\n";
}
Daniel Herrington wrote:
> All,
>
> I'm new to classes in perl and I've hit a roadblock using the
> File::Monitor class. From the doc for File::Monitor
> http://search.cpan.org/~andya/File-Monitor-0.10/lib/File/Monitor/Object.pm
> <http://search.cpan.org/search?mode=module&query=File%3A%3AMonitor>:
> The state of the monitored file or directory at the time of the last
> scan can be queried. Before scan is called these methods will all return
> undef. The following methods return the value of the corresponding field
> from "stat" in perlfunc.
> For example:
>
> my $modified = $object->mtime;
>
> Now I've instantiated my object as per the instructions:
>
> use File::Monitor; use File::Monitor::Object; my $wFileMonitor =
> File::Monitor->new(); $wFileMonitor->watch($wFile); $wFileMonitor->scan;
> my $modified = $wFileMonitor->mtime
>
> But I get the following error:
> Can't locate object method "mtime" via package "File::Monitor" at
> /home/workspace/watchFile.pl line 65.
>
> I know it's getting lost in the reference to mtime, but I'm at a loss on
> how to access it. The doc simply refers to $object->mtime and my read of
> it says that $wFileMonitor should be $object.
> thanks,
>
> --
> Daniel B. Herrington
> Director of Field Services
> Robert Mark Technologies
> dherrington at robertmarktechnologies.com
> o: 651-769-2574
> m: 503-358-8575
>
>
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>
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--
Robert Buels
Bioinformatics Analyst, Sol Genomics Network
Boyce Thompson Institute for Plant Research
Tower Rd
Ithaca, NY 14853
Tel: 503-889-8539
rmb32 at cornell.edu
http://www.sgn.cornell.edu
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