/**
* Get the attribute of the specified replica set node
* Ths resolves node inheritance and explicit configuration data
* such as alternate database service addresses in slony configurations
* @param SimpleXMLElement $replica_set
* @param integer $node_id
* @param string $attribute
*/
protected static function get_slony_replica_set_node_attribute($db_doc, $replica_set, $node_id, $attribute)
{
$replica_node = NULL;
// is the node_id specified the origin node?
if ((int) $replica_set['originNodeId'] == $node_id) {
$replica_node = $replica_set;
} else {
foreach ($replica_set->slonyReplicaSetNode as $set_node) {
if ((int) $set_node['id'] == $node_id) {
$replica_node = $set_node;
}
}
}
if (!is_object($replica_node)) {
throw new exception("Replica set " . $replica_set['id'] . " node " . $node_id . " not found");
}
// if the replica_node defines this attribute, return it, if not return master node definition value
if (isset($replica_node[$attribute])) {
return (string) $replica_node[$attribute];
}
$slony_node = pgsql8::get_slony_node($db_doc, $node_id);
return (string) $slony_node[$attribute];
}
