Extend host topology with NIC type filtering

[csit.git] / resources / libraries / python / NodePath.py

diff --git a/resources/libraries/python/NodePath.py b/resources/libraries/python/NodePath.py
index d1aa1f7..dfcee4d 100644 (file)
--- a/resources/libraries/python/NodePath.py
+++ b/resources/libraries/python/NodePath.py
@@ -13,7 +13,7 @@
 
 """Path utilities library for nodes in the topology."""
 
-from topology import Topology
+from resources.libraries.python.topology import Topology
 
 
 class NodePath(object):
@@ -55,16 +55,20 @@ class NodePath(object):
 
     def __init__(self):
         self._nodes = []
+        self._nodes_filter = []
         self._links = []
         self._path = []
         self._path_iter = []
 
-    def append_node(self, node):
+    def append_node(self, node, filter_list=None):
         """Append node to the path.
 
         :param node: Node to append to the path.
+        :param filter_list: Filter criteria list.
         :type node: dict
+        :type filter_list: list of strings
         """
+        self._nodes_filter.append(filter_list)
         self._nodes.append(node)
 
     def append_nodes(self, *nodes):
@@ -81,6 +85,7 @@ class NodePath(object):
     def clear_path(self):
         """Clear path."""
         self._nodes = []
+        self._nodes_filter = []
         self._links = []
         self._path = []
         self._path_iter = []
@@ -89,13 +94,14 @@ class NodePath(object):
         """Compute path for added nodes.
 
         :param always_same_link: If True use always same link between two nodes
-            in path. If False use different link (if available) between two
-            nodes if one link was used before.
+        in path. If False use different link (if available) between two
+        nodes if one link was used before.
         :type always_same_link: bool
 
         .. note:: First add at least two nodes to the topology.
         """
         nodes = self._nodes
+        nodes_filer = self._nodes_filter
         if len(nodes) < 2:
             raise RuntimeError('Not enough nodes to compute path')
 
@@ -103,18 +109,23 @@ class NodePath(object):
             topo = Topology()
             node1 = nodes[idx]
             node2 = nodes[idx + 1]
-            links = topo.get_active_connecting_links(node1, node2)
+            n1_list = self._nodes_filter[idx]
+            n2_list = self._nodes_filter[idx + 1]
+            links = topo.get_active_connecting_links(node1, node2,
+                                                     filter_list_node1=n1_list,
+                                                     filter_list_node2=n2_list)
             if not links:
                 raise RuntimeError('No link between {0} and {1}'.format(
                     node1['host'], node2['host']))
 
-            link = None
-            l_set = set()
-
             if always_same_link:
                 l_set = set(links).intersection(self._links)
             else:
                 l_set = set(links).difference(self._links)
+                if not l_set:
+                    raise RuntimeError(
+                        'No free link between {0} and {1}, all links already '
+                        'used'.format(node1['host'], node2['host']))
 
             if not l_set:
                 link = links.pop()
@@ -139,7 +150,7 @@ class NodePath(object):
         .. note:: Call compute_path before.
         """
         if not self._path_iter:
-            return (None, None)
+            return None, None
         else:
             return self._path_iter.pop()