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<?php
/**
* Table Definition for irc_waiting_message
*/
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
class Irc_waiting_message extends Memcached_DataObject {
public $__table = 'irc_waiting_message'; // table name
public $id; // int primary_key not_null auto_increment
public $data; // blob not_null
public $prioritise; // tinyint(1) not_null
public $attempts; // int not_null
public $created; // datetime() not_null
public $claimed; // datetime()
/* Static get */
public function staticGet($k, $v = null) {
return Memcached_DataObject::staticGet('Irc_waiting_message', $k, $v);
}
/**
* return table definition for DB_DataObject
*
* DB_DataObject needs to know something about the table to manipulate
* instances. This method provides all the DB_DataObject needs to know.
*
* @return array array of column definitions
*/
public function table() {
return array('id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
'data' => DB_DATAOBJECT_BLOB + DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
'prioritise' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
'created' => DB_DATAOBJECT_TIME + DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
'claimed' => DB_DATAOBJECT_TIME + DB_DATAOBJECT_STR);
}
/**
* return key definitions for DB_DataObject
*
* DB_DataObject needs to know about keys that the table has, since it
* won't appear in StatusNet's own keys list. In most cases, this will
* simply reference your keyTypes() function.
*
* @return array list of key field names
*/
public function keys() {
return array_keys($this->keyTypes());
}
/**
* return key definitions for Memcached_DataObject
*
* Our caching system uses the same key definitions, but uses a different
* method to get them. This key information is used to store and clear
* cached data, so be sure to list any key that will be used for static
* lookups.
*
* @return array associative array of key definitions, field name to type:
* 'K' for primary key: for compound keys, add an entry for each component;
* 'U' for unique keys: compound keys are not well supported here.
*/
public function keyTypes() {
return array('id' => 'K');
}
/**
* Magic formula for non-autoincrementing integer primary keys
*
* If a table has a single integer column as its primary key, DB_DataObject
* assumes that the column is auto-incrementing and makes a sequence table
* to do this incrementation. Since we don't need this for our class, we
* overload this method and return the magic formula that DB_DataObject needs.
*
* @return array magic three-false array that stops auto-incrementing.
*/
public function sequenceKey() {
return array(false, false, false);
}
/**
* Get the next item in the queue
*
* @return Irc_waiting_message Next message if there is one
*/
public static function top() {
$wm = new Irc_waiting_message();
$wm->orderBy('prioritise DESC, created');
$wm->whereAdd('claimed is null');
$wm->limit(1);
$cnt = $wm->find(true);
if ($cnt) {
# XXX: potential race condition
# can we force it to only update if claimed is still null
# (or old)?
common_log(LOG_INFO, 'claiming IRC waiting message id = ' . $wm->id);
$orig = clone($wm);
$wm->claimed = common_sql_now();
$result = $wm->update($orig);
if ($result) {
common_log(LOG_INFO, 'claim succeeded.');
return $wm;
} else {
common_log(LOG_INFO, 'claim failed.');
}
}
$wm = null;
return null;
}
/**
* Increment the attempts count
*
* @return void
* @throws Exception
*/
public function incAttempts() {
$orig = clone($this);
$this->attempts++;
$result = $this->update($orig);
if (!$result) {
throw Exception(sprintf(_m("Could not increment attempts count for %d"), $this->id));
}
}
/**
* Release a claimed item.
*/
public function releaseClaim() {
// DB_DataObject doesn't let us save nulls right now
$sql = sprintf("UPDATE irc_waiting_message SET claimed=NULL WHERE id=%d", $this->id);
$this->query($sql);
$this->claimed = null;
$this->encache();
}
}
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