*/
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
-class Queue_item extends Memcached_DataObject
+class Queue_item extends Managed_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 $id; // int(4) primary_key not_null
+ public $frame; // blob not_null
+ public $transport; // varchar(32)
public $created; // datetime() not_null
public $claimed; // datetime()
- /* Static get */
- function staticGet($k,$v=null)
- { return Memcached_DataObject::staticGet('Queue_item',$k,$v); }
-
/* the code above is auto generated do not remove the tag below */
###END_AUTOCODE
- function sequenceKey()
- { return array(false, false); }
+ public static function schemaDef()
+ {
+ return array(
+ 'fields' => array(
+ 'id' => array('type' => 'serial', 'not null' => true, 'description' => 'unique identifier'),
+ 'frame' => array('type' => 'blob', 'not null' => true, 'description' => 'data: object reference or opaque string'),
+ 'transport' => array('type' => 'varchar', 'length' => 32, 'not null' => true, 'description' => 'queue for what? "email", "xmpp", "sms", "irc", ...'),
+ 'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
+ 'claimed' => array('type' => 'datetime', 'description' => 'date this item was claimed'),
+ ),
+ 'primary key' => array('id'),
+ 'indexes' => array(
+ 'queue_item_created_idx' => array('created'),
+ ),
+ );
+ }
- static function top($transport=null) {
+ /**
+ * @param mixed $transports name of a single queue or array of queues to pull from
+ * If not specified, checks all queues in the system.
+ */
+ static function top($transports=null) {
$qi = new Queue_item();
- if ($transport) {
- $qi->transport = $transport;
+ if ($transports) {
+ if (is_array($transports)) {
+ // @fixme use safer escaping
+ $list = implode("','", array_map(array($qi, 'escape'), $transports));
+ $qi->whereAdd("transport in ('$list')");
+ } else {
+ $qi->transport = $transports;
+ }
}
$qi->orderBy('created');
$qi->whereAdd('claimed is null');
$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 .
+ // 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 id = ' . $qi->id .
' for transport ' . $qi->transport);
$orig = clone($qi);
$qi->claimed = common_sql_now();
return null;
}
- function pkeyGet($kv)
+ /**
+ * Release a claimed item.
+ */
+ function releaseCLaim()
{
- return Memcached_DataObject::pkeyGet('Queue_item', $kv);
+ // DB_DataObject doesn't let us save nulls right now
+ $sql = sprintf("UPDATE queue_item SET claimed=NULL WHERE id=%d", $this->id);
+ $this->query($sql);
+
+ $this->claimed = null;
+ $this->encache();
}
}