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Mail::Box::Locker::NFS(3pm) User Contributed Perl Documentation Mail::Box::Locker::NFS(3pm)
NAME
Mail::Box::Locker::NFS - lock a folder with a separate file, NFS-safe
INHERITANCE
Mail::Box::Locker::NFS
is a Mail::Box::Locker
is a Mail::Reporter
SYNOPSIS
See Mail::Box::Locker
DESCRIPTION
Like the "::DotLock" locker, but then in an NFS-safe fashion. Over NFS, the creation of a
file is not atomic. The "::DotLock" locker depends on an atomic "open" system call, hence
in not usable to lock a folder which accessed over NFS. The "::NFS" locker is therefore
more complicated (so therefore slower), but will work for NFS --and for local disks as
well.
METHODS
Constructors
Mail::Box::Locker::NFS->new(OPTIONS)
Option --Defined in --Default
expires Mail::Box::Locker 1 hour
file Mail::Box::Locker undef
folder Mail::Box::Locker <required>
log Mail::Reporter 'WARNINGS'
method Mail::Box::Locker 'NFS'
timeout Mail::Box::Locker 10 seconds
trace Mail::Reporter 'WARNINGS'
. expires => SECONDS
. file => FILENAME
. folder => FOLDER
. log => LEVEL
. method => STRING|CLASS|ARRAY
. timeout => SECONDS|'NOTIMEOUT'
. trace => LEVEL
The Locker
$obj->filename([FILENAME])
See "The Locker" in Mail::Box::Locker
$obj->folder
See "The Locker" in Mail::Box::Locker
$obj->name
See "The Locker" in Mail::Box::Locker
Locking
$obj->hasLock
See "Locking" in Mail::Box::Locker
$obj->isLocked
See "Locking" in Mail::Box::Locker
$obj->lock
$obj->unlock
See "Locking" in Mail::Box::Locker
Error handling
$obj->AUTOLOAD
See "Error handling" in Mail::Reporter
$obj->addReport(OBJECT)
See "Error handling" in Mail::Reporter
$obj->defaultTrace([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK])
Mail::Box::Locker::NFS->defaultTrace([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK])
See "Error handling" in Mail::Reporter
$obj->errors
See "Error handling" in Mail::Reporter
$obj->log([LEVEL [,STRINGS]])
Mail::Box::Locker::NFS->log([LEVEL [,STRINGS]])
See "Error handling" in Mail::Reporter
$obj->logPriority(LEVEL)
Mail::Box::Locker::NFS->logPriority(LEVEL)
See "Error handling" in Mail::Reporter
$obj->logSettings
See "Error handling" in Mail::Reporter
$obj->notImplemented
See "Error handling" in Mail::Reporter
$obj->report([LEVEL])
See "Error handling" in Mail::Reporter
$obj->reportAll([LEVEL])
See "Error handling" in Mail::Reporter
$obj->trace([LEVEL])
See "Error handling" in Mail::Reporter
$obj->warnings
See "Error handling" in Mail::Reporter
Cleanup
$obj->DESTROY
See "Cleanup" in Mail::Box::Locker
$obj->inGlobalDestruction
See "Cleanup" in Mail::Reporter
DIAGNOSTICS
Warning: Folder $folder already locked over nfs
Do not try to lock the folder when the application already has the lock: it will give
you dead-locks.
Error: Package $package does not implement $method.
Fatal error: the specific package (or one of its superclasses) does not implement this
method where it should. This message means that some other related classes do
implement this method however the class at hand does not. Probably you should
investigate this and probably inform the author of the package.
Warning: Removed expired lockfile $filename.
A lock file was found which was older than the expiration period as specified with
new(timeout). The lock file was succesfully removed.
Error: Unable to remove expired lockfile $lockfile: $!
A lock file was found which was older than the expiration period as specified with the
new(timeout) option. It is impossible to remove that lock file, so we need to wait
until it vanishes by some external cause.
SEE ALSO
This module is part of Mail-Box distribution version 2.082, built on April 28, 2008.
Website: http://perl.overmeer.net/mailbox/
LICENSE
Copyrights 2001-2008 by Mark Overmeer. For other contributors see ChangeLog.
This program is free software; you can redistribute it and/or modify it under the same
terms as Perl itself. See http://www.perl.com/perl/misc/Artistic.html
perl v5.10.0 2008-04-28 Mail::Box::Locker::NFS(3pm)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-24 17:13 @38.107.179.238 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)