NSB update

Refactored main NSB VNF classes accroding to class diagram

https://wiki.opnfv.org/display/yardstick/NSB+class+diagram

All the SampleVNFs have been separated and placed under
the SampleVNF class.

Added AutoConnectSSH to automatically create SSH conneciton on demand.

Added VnfdHelper class to wrap the VNFD dictionary in prepartion for
class-based modeling.

Extracted DpdkVnfSetupEnvHelper for DPDK based VNF setup.

Extracted Stats and other client config to ResourceHelper

Had to replace dict_key_flatten with deepgetitem due to Python 2.7
Jinja2 infinite recursion.

Change-Id: Ia8840e9c44cdbdf39aab6b02e6d2176b31937dc9
Signed-off-by: Deepak S <deepak.s@linux.intel.com>
Signed-off-by: Edward MacGillivray <edward.s.macgillivray@intel.com>
Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

1 files changed, 27 insertions, 2 deletions

diff --git a/yardstick/benchmark/contexts/base.py b/yardstick/benchmark/contexts/base.py
index e362c6a3d..c9b5b51c9 100644
--- a/yardstick/benchmark/contexts/base.py
+++ b/yardstick/benchmark/contexts/base.py
@@ -18,6 +18,15 @@ class Context(object):
     """Class that represents a context in the logical model"""
     list = []
 
+    @staticmethod
+    def split_name(name, sep='.'):
+        try:
+            name_iter = iter(name.split(sep))
+        except AttributeError:
+            # name is not a string
+            return None, None
+        return next(name_iter), next(name_iter, None)
+
     def __init__(self):
         Context.list.append(self)
 
@@ -71,7 +80,23 @@ class Context(object):
         try:
             return next(s for s in servers if s)
         except StopIteration:
-            raise ValueError("context not found for server '%r'" %
+            raise ValueError("context not found for server %r" %
+                             attr_name)
+
+    @staticmethod
+    def get_context_from_server(attr_name):
+        """lookup context info by name from node config
+        attr_name: either a name of the node created by yardstick or a dict
+        with attribute name mapping when using external templates
+
+        :returns Context instance
+        """
+        servers = ((context._get_server(attr_name), context)
+                   for context in Context.list)
+        try:
+            return next(con for s, con in servers if s)
+        except StopIteration:
+            raise ValueError("context not found for name %r" %
                              attr_name)
 
     @staticmethod
@@ -85,5 +110,5 @@ class Context(object):
         try:
             return next(n for n in networks if n)
         except StopIteration:
-            raise ValueError("context not found for server '%r'" %
+            raise ValueError("context not found for server %r" %
                              attr_name)