gnu-social/classes/Queue_item.php
Evan Prodromou e2e6bbb298 caching layer for DB/DataObject
I added a new class, Memcached_DataObject, that will (optionally)
fetch data out of a memcached server if it's available. This only
works on 'staticGet'.

Methods that write to the database (insert, update, delete) will clear
and set the cache correctly, too.

darcs-hash:20080926160941-5ed1f-922de078b4c1941853ad014edf9a17fae486f8cf.gz
2008-09-26 12:09:41 -04:00

56 lines
1.5 KiB
PHP

<?php
/**
* Table Definition for queue_item
*/
require_once 'classes/Memcached_DataObject.php';
class Queue_item extends Memcached_DataObject
{
###START_AUTOCODE
/* the code below is auto generated do not remove the above tag */
public $__table = 'queue_item'; // table name
public $notice_id; // int(4) primary_key not_null
public $transport; // varchar(8) primary_key not_null
public $created; // datetime() not_null
public $claimed; // datetime()
/* Static get */
function staticGet($k,$v=NULL) { return Memcached_DataObject::staticGet('Queue_item',$k,$v); }
/* the code above is auto generated do not remove the tag below */
###END_AUTOCODE
function sequenceKey() { return array(false, false); }
static function top($transport) {
$qi = new Queue_item();
$qi->transport = $transport;
$qi->orderBy('created');
$qi->whereAdd('claimed is NULL');
$qi->limit(1);
$cnt = $qi->find(TRUE);
if ($cnt) {
# XXX: potential race condition
# can we force it to only update if claimed is still NULL
# (or old)?
common_log(LOG_INFO, 'claiming queue item = ' . $qi->notice_id . ' for transport ' . $transport);
$orig = clone($qi);
$qi->claimed = common_sql_now();
$result = $qi->update($orig);
if ($result) {
common_log(LOG_INFO, 'claim succeeded.');
return $qi;
} else {
common_log(LOG_INFO, 'claim failed.');
}
}
$qi = NULL;
return NULL;
}
}