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TM::Synchronizable.3pm
Langue: en
Version: 2010-06-22 (ubuntu - 24/10/10)
Section: 3 (Bibliothèques de fonctions)
NAME
TM::Synchronizable - Topic Maps, trait for synchronizable resourcesSYNOPSIS
# you write an input/output driver # see for example TM::Synchronizable::MLDBM package My::WhatEver; # provides source_in and/or source_out methods sub source_in { .... } sub source_out { .... } 1; # you construct your map class package MySyncableMap; use TM; use base qw(TM); use Class::Trait qw(TM::ResourceAble TM::Synchronizable My::WhatEver); 1; # you then use that my $tm = MySyncableMap (url => 'file:/where/ever'); $tm->sync_in; # work with the map, etc... $tm->sync_out;
DESCRIPTION
This trait implements the abstract synchronization between in-memory topic maps and the resources which are attached to them, i.e. files, web pages, etc. whatever can be addressed via a URI. Consequently, this trait inherits from TM::ResourceAble, although Class::Trait does not do this for you (sadly).The trait provides the methods "sync_in" and "sync_out" to implement the synchronization. In this process it uses the timestamp of the map ("last_mod") and that of the resource "mtime".
Unfortunately, the granularity of the two are different (at least on current UNIX systems): for the last modification time values from Time::HiRes is used. UNIX resources only use an integer.
Note: This needs a bit of consideration from the user's side.
INTERFACE
Methods
- sync_in
- $tm->sync_in
This method provides only the main logic, whether a synchronisation from the resource into the in-memory map should occur. If the last modification date of the resource ("mtime") is more recent than that of the map ("last_mod"), then synchronisation from the resource to the in-memory map will be triggered. For this, a method "source_in" has to exist for the map object; that will be invoked.
[Since TM 1.53]: Any additional parameters are passed through to the underlying "source_in" method.
- sync_out
- $tm->sync_out
This method provides the logic, whether synchronisation from the in-memory map towards the attached resource should occur or not. If the last modification date of the map ("last_mod") is more recent than that of the resource ("mtime"), then a method "source_out" for the object is triggered.
[Since TM 1.53]: Any additional parameters are passed through to the underlying "source_out" method.
SEE ALSO
TM, TM::ResourceAbleAUTHOR INFORMATION
Copyright 20(0[6]|10), Robert Barta <drrho@cpan.org>, All rights reserved.This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. http://www.perl.com/perl/misc/Artistic.html
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre