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Nathan Adams
2013-07-20 17:41:56 -05:00
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pluf/src/Pluf/Queue.php Normal file
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<?php
/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
# ***** BEGIN LICENSE BLOCK *****
# This file is part of Plume Framework, a simple PHP Application Framework.
# Copyright (C) 2001-2007 Loic d'Anterroches and contributors.
#
# Plume Framework is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Plume Framework is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# ***** END LICENSE BLOCK ***** */
/**
* Simple queue system to delay the processing of tasks.
*
* What you do is that you push in the queue an object and what was
* done on the object. Then later one, a simple script will go through
* the queue and will check if something has to be done for the given
* object.
*
* For example, you have articles with for each articles a list of
* authors. You want to index the article with also the name of the
* authors. So it means that you need to update the index when an
* author is changed and when an article is changed. But you do not
* want to do the indexing of all the articles of an author when you
* update the author information (if this take 0.5s per article, with
* 100 articles, you would have to wait nearly 1 minute!).
*
* So when you update an author you push in the queue: "author x has
* been updated". Then you have a script that will go in the queue,
* find that the author has been updated and index each of his
* articles.
*/
class Pluf_Queue extends Pluf_Model
{
public $_model = __CLASS__;
function init()
{
$this->_a['verbose'] = __('message queue');
$this->_a['table'] = 'pluf_queue';
$this->_a['model'] = __CLASS__;
$this->_a['cols'] = array(
// It is mandatory to have an "id" column.
'id' =>
array(
'type' => 'Pluf_DB_Field_Sequence',
//It is automatically added.
'blank' => true,
),
'model_class' =>
array(
'type' => 'Pluf_DB_Field_Varchar',
'blank' => false,
'size' => 150,
'verbose' => __('model class'),
),
'model_id' =>
array(
'type' => 'Pluf_DB_Field_Integer',
'blank' => false,
'verbose' => __('model id'),
),
'action' =>
array(
'type' => 'Pluf_DB_Field_Varchar',
'blank' => false,
'size' => 150,
'verbose' => __('action'),
),
'lock' =>
array(
'type' => 'Pluf_DB_Field_Integer',
'blank' => false,
'verbose' => __('lock status'),
'default' => 0,
'choices' => array(
__('Free') => 0,
__('In progress') => 1,
__('Completed') => 2,
),
),
'creation_dtime' =>
array(
'type' => 'Pluf_DB_Field_Datetime',
'blank' => true,
'verbose' => __('created at'),
),
'modif_dtime' =>
array(
'type' => 'Pluf_DB_Field_Datetime',
'blank' => true,
'verbose' => __('modified at'),
),
);
$this->_a['idx'] = array(
'lock_idx' =>
array(
'type' => 'normal',
'col' => 'lock',
),
);
}
function preSave($create=false)
{
if ($this->id == '') {
$this->creation_dtime = gmdate('Y-m-d H:i:s');
}
$this->modif_dtime = gmdate('Y-m-d H:i:s');
}
/**
* Add an object to the queue.
*
* @param Pluf_Model Your model
* @param string Action for the object
*/
public static function addTo($object, $action='')
{
$q = new Pluf_Queue();
$q->model_class = $object->_model;
$q->model_id = $object->id;
$q->lock = 0;
$q->action = $action;
$q->create();
}
}