Fixing core dump in NS3/DCE caused by getting the DceApplication Pid too early

[nepi.git] / src / nepi / resources / ns3 / ns3application.py

diff --git a/src/nepi/resources/ns3/ns3application.py b/src/nepi/resources/ns3/ns3application.py
index 1007c5f..64bacf7 100644 (file)
--- a/src/nepi/resources/ns3/ns3application.py
+++ b/src/nepi/resources/ns3/ns3application.py
@@ -24,17 +24,24 @@ from nepi.resources.ns3.ns3base import NS3Base
 class NS3BaseApplication(NS3Base):
     _rtype = "abstract::ns3::Application"
 
+    def __init__(self, ec, guid):
+        super(NS3BaseApplication, self).__init__(ec, guid)
+        self._node = None
+ 
     @property
     def node(self):
-        from nepi.resources.ns3.ns3node import NS3BaseNode
-        nodes = self.get_connected(NS3BaseNode.get_rtype())
+        if not self._node:
+            from nepi.resources.ns3.ns3node import NS3BaseNode
+            nodes = self.get_connected(NS3BaseNode.get_rtype())
 
-        if not nodes: 
-            msg = "Application not connected to node"
-            self.error(msg)
-            raise RuntimeError, msg
+            if not nodes: 
+                msg = "Application not connected to node"
+                self.error(msg)
+                raise RuntimeError, msg
 
-        return nodes[0]
+            self._node = nodes[0]
+
+        return self._node
 
     @property
     def _rms_to_wait(self):