We are no longer offering accounts on this server. Consider https://gitlab.freedesktop.org/ as a place to host projects.

dbqueuemanager.php 3.26 KB
Newer Older
Evan Prodromou's avatar
Evan Prodromou committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
<?php
/**
 * Laconica, the distributed open-source microblogging tool
 *
 * Simple-minded queue manager for storing items in the database
 *
 * PHP version 5
 *
 * LICENCE: This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @category  QueueManager
 * @package   Laconica
 * @author    Evan Prodromou <evan@controlyourself.ca>
 * @author    Sarven Capadisli <csarven@controlyourself.ca>
 * @copyright 2009 Control Yourself, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link      http://laconi.ca/
 */

class DBQueueManager extends QueueManager
{
    var $qis = array();

    function enqueue($object, $queue)
    {
37
        $notice = $object;
Evan Prodromou's avatar
Evan Prodromou committed
38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78

        $qi = new Queue_item();

        $qi->notice_id = $notice->id;
        $qi->transport = $queue;
        $qi->created   = $notice->created;
        $result        = $qi->insert();

        if (!$result) {
            common_log_db_error($qi, 'INSERT', __FILE__);
            throw new ServerException('DB error inserting queue item');
        }

        return true;
    }

    function nextItem($queue, $timeout=null)
    {
        $start = time();
        $result = null;

        do {
            $qi = Queue_item::top($queue);
            if (!empty($qi)) {
                $notice = Notice::staticGet('id', $qi->notice_id);
                if (!empty($notice)) {
                    $result = $notice;
                } else {
                    $this->_log(LOG_INFO, 'dequeued non-existent notice ' . $notice->id);
                    $qi->delete();
                    $qi->free();
                    $qi = null;
                }
            }
        } while (empty($result) && (is_null($timeout) || (time() - $start) < $timeout));

        return $result;
    }

    function done($object, $queue)
    {
79 80 81
        // XXX: right now, we only handle notices

        $notice = $object;
Evan Prodromou's avatar
Evan Prodromou committed
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108

        $qi = Queue_item::pkeyGet(array('notice_id' => $notice->id,
                                        'transport' => $queue));

        if (empty($qi)) {
            $this->log(LOG_INFO, 'Cannot find queue item for notice '.$notice->id.', queue '.$queue);
        } else {
            if (empty($qi->claimed)) {
                $this->log(LOG_WARNING, 'Reluctantly releasing unclaimed queue item '.
                           'for '.$notice->id.', queue '.$queue);
            }
            $qi->delete();
            $qi->free();
            $qi = null;
        }

        $this->log(LOG_INFO, 'done with notice ID = ' . $notice->id);

        $notice->free();
        $notice = null;
    }

    function _log($level, $msg)
    {
        common_log($level, 'DBQueueManager: '.$msg);
    }
}