locking_method.inc

<?php
require_once SQ_INCLUDE_PATH.'/asset.inc';


class Locking_Method extends Asset
{


    public function __construct($assetid=0)
    {
        parent::__construct($assetid);

    }//end __construct()


    public static function acquireLock($lockid, $source_lockid='', $expires=0)
    {
        trigger_error('This locking method has not implemented acquiring of locks', E_USER_ERROR);

    }//end acquireLock()


    public static function updateLock($lockid, $expires=0)
    {
        trigger_error('This locking method has not implemented updating of locks', E_USER_ERROR);

    }//end acquireLock()


    public static function releaseLock($lockid)
    {
        trigger_error('This locking method has not implemented releasing of locks', E_USER_ERROR);

    }//end releaseLock()


    public static function getLockInfo($lockid, $full_chain=FALSE, $check_expires=TRUE, $allow_only_one=TRUE)
    {
        trigger_error('This locking method has not implemented getting of lock info', E_USER_ERROR);

    }//end getLockInfo()





    public static function getActiveLocks($owner_assetid=NULL, $include_expired=FALSE)
    {
        if (self::supportsGetActiveLocks() === FALSE) {
            trigger_error('This locking method does not support getting of active locks', E_USER_WARNING);
            return FALSE;
        } else {
            trigger_error('This locking method supports getting of active locks, but has not implemented getActiveLocks method', E_USER_ERROR);
        }

    }//end getActiveLocks()


    public static function supportsGetActiveLocks()
    {
        return TRUE;

    }//end supportsGetActiveLocks()


    public static function changeLockOwner($old_assetid, $new_assetid)
    {
        if (self::supportsGetActiveLocks() === FALSE) {
            trigger_error('This locking method does not support changing of lock owner', E_USER_WARNING);
            return FALSE;
        } else {
            trigger_error('This locking method supports changing of lock owner, but has not implemented changeLockOwner method', E_USER_ERROR);
        }

    }//end changeLockOwner()


    public static function supportsChangeLockOwner()
    {
        return TRUE;

    }//end supportsChangeLockOwner()


    public static function supportsDeletingExpiredLocks()
    {
        return TRUE;

    }//end supportsDeletingExpiredLocks()


}//end class

?>