26115482ef
Avoid the use of deprecated MariaDB "zero dates" globally. If they're present as attribute defaults somewhere, they will be replaced with NULL implicitly. The existing "zero dates" in MariaDB storage will be left intact and this should not present any issues. The "timestamp" type in table definitions now corresponds to DATETIME in MariaDB with "DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP", which should be close enough to the original behaviour for compatibility purposes. It is now the recommended type for "modified" attributes, because of the update trigger on MariaDB. But there is no such trigger implemented on PostgreSQL as of this moment.
115 lines
4.3 KiB
PHP
115 lines
4.3 KiB
PHP
<?php
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Table Definition for queue_item
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*/
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defined('GNUSOCIAL') || die();
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class Queue_item extends Managed_DataObject
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{
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###START_AUTOCODE
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/* the code below is auto generated do not remove the above tag */
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public $__table = 'queue_item'; // table name
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public $id; // int(4) primary_key not_null
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public $frame; // blob not_null
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public $transport; // varchar(32)
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public $created; // datetime()
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public $claimed; // datetime()
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/* the code above is auto generated do not remove the tag below */
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###END_AUTOCODE
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public static function schemaDef()
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{
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return array(
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'fields' => array(
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'id' => array('type' => 'serial', 'not null' => true, 'description' => 'unique identifier'),
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'frame' => array('type' => 'blob', 'not null' => true, 'description' => 'data: object reference or opaque string'),
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'transport' => array('type' => 'varchar', 'length' => 32, 'not null' => true, 'description' => 'queue for what? "email", "xmpp", "sms", "irc", ...'),
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'created' => array('type' => 'datetime', 'description' => 'date this record was created'),
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'claimed' => array('type' => 'datetime', 'description' => 'date this item was claimed'),
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),
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'primary key' => array('id'),
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'indexes' => array(
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'queue_item_created_idx' => array('created'),
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),
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);
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}
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/**
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* @param mixed $transports name of a single queue or array of queues to pull from
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* If not specified, checks all queues in the system.
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*/
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public static function top($transports = null, array $ignored_transports = [])
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{
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$qi = new Queue_item();
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if ($transports) {
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if (is_array($transports)) {
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// @fixme use safer escaping
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$list = implode("','", array_map(array($qi, 'escape'), $transports));
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$qi->whereAdd("transport in ('$list')");
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} else {
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$qi->transport = $transports;
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}
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}
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if (!empty($ignored_transports)) {
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// @fixme use safer escaping
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$list = implode("','", array_map(array($qi, 'escape'), $ignored_transports));
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$qi->whereAdd("transport NOT IN ('$list')");
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}
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$qi->orderBy('created');
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$qi->whereAdd('claimed is null');
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$qi->limit(1);
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$cnt = $qi->find(true);
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if ($cnt) {
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// XXX: potential race condition
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// can we force it to only update if claimed is still null
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// (or old)?
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common_log(LOG_INFO, 'claiming queue item id = ' . $qi->getID() . ' for transport ' . $qi->transport);
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$orig = clone($qi);
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$qi->claimed = common_sql_now();
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$result = $qi->update($orig);
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if ($result) {
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common_log(LOG_DEBUG, 'claim succeeded.');
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return $qi;
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} else {
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common_log(LOG_ERR, 'claim of queue item id= ' . $qi->getID() . ' for transport ' . $qi->transport . ' failed.');
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}
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}
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$qi = null;
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return null;
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}
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/**
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* Release a claimed item.
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*/
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public function releaseClaim()
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{
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// DB_DataObject doesn't let us save nulls right now
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$sql = sprintf("UPDATE queue_item SET claimed=NULL WHERE id=%d", $this->getID());
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$this->query($sql);
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$this->claimed = null;
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$this->encache();
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}
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}
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