Mail::Box::Locker::NFS3pm

Usage

  See Mail::Box::Locker

Inheritance

 Mail::Box::Locker::NFS
   is a Mail::Box::Locker
   is a Mail::Reporter

Overview

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.

Extends "DESCRIPTION" in Mail::Box::Locker.

Methods

Extends "METHODS" in Mail::Box::Locker.

Diagnostics

Error: class $package does not implement method $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. Cast by notImplemented()

Fault: couldn't remove lockfile $file: $!

Cast by unlock()

Warning: folder $name already locked over NFS.

Do not try to lock the folder when the application already has the lock: it will give you dead-locks. Cast by lock()

Warning: removed expired lockfile $file.

A lock $file was found which was older than the expiration period as specified with new(timeout). The lock file was successfully removed. Cast by lock()

Fault: unable to remove expired lockfile $file: $!

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. Cast by lock()