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Path: /data/applications/aps/tikiwiki/7.0-0/standard/htdocs/lib/ [ Home ]
File: queuelib.php
<?php
// (c) Copyright 2002-2011 by authors of the Tiki Wiki CMS Groupware Project
// 
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id: queuelib.php 34405 2011-05-13 19:05:26Z lphuberdeau $

class QueueLib extends TikiDb_Bridge
{
	private $queue;

	function __construct()
	{
		$this->queue = $this->table('tiki_queue');
	}

	function push($queue, array $message)
	{
		$this->queue->insert(array(
			'queue' => $queue,
			'timestamp' => TikiLib::lib('tiki')->now,
			'message' => json_encode($message),
		));
	}

	function clear($queue)
	{
		$this->queue->deleteMultiple(array(
			'queue' => $queue,
		));
	}

	function pull($queue, $count = 1)
	{
		$handler = uniqid();

		// Mark entries as in processing
		$this->queue->updateMultiple(array('handler' => $handler), array(
			'queue' => $queue,
			'handler' => null,
		), $count);

		// Obtain the marked list
		$messages = $this->queue->fetchColumn('message', array(
			'handler' => $handler,
		));

		// Delete from the queue
		$this->queue->deleteMultiple(array(
			'handler' => $handler,
		));

		// Strip duplicate messages
		$messages = array_unique($messages);
		if (count($messages)) {
			return array_map('json_decode', $messages, array_fill(0, count($messages), true));
		} else {
		}	return array();
	}
}