Galaxia Workflow Engine

// Test if the join activity has preceding activities that are not completed yet
	if ($type == 'join') {
		$querycant = "select count(*) from `" . GALAXIA_TABLE_PREFIX . "transitions` tr " . "INNER JOIN " . GALAXIA_TABLE_PREFIX . "instance_activities gia ON tr.actFromId=gia.activityId " . "where tr.pid=? and tr.actToId=? and gia.instanceId=? and gia.status = ?";
		// if there are still preceding activities not completed, STOP
		if ($nb = $this->getone($querycant, array($this->pId, $activityId, $iid, 'running'))) {
			//echo 'Pending preceding activities = ' . $nb;
			return;
		}
	}

// Test if the join activity has preceding activities that are not completed yet
	if ($type == 'join') {
		$querycant = "SELECT
					     (SELECT COUNT(*) FROM `" . GALAXIA_TABLE_PREFIX . "transitions` WHERE actToId = ?)
                         -
						 (SELECT COUNT(*) FROM `" . GALAXIA_TABLE_PREFIX . "transitions` tr " . "INNER JOIN "
		                 . GALAXIA_TABLE_PREFIX . "instance_activities gia ON tr.actFromId=gia.activityId "
                         . "where tr.pid=? and tr.actToId=? and gia.instanceId=? and gia.status = ?)
					  AS Pending";

		// if there are still preceding activities not completed, STOP
		if ($nb = $this->getone($querycant, array($activityId, $this->pId, $activityId, $iid, 'completed'))) {
			//echo 'Pending preceding activities = ' . $nb;
			return;
		}
	}