Merge "BugFIX: NSB-setup build script fix for BM"

[yardstick.git] / yardstick / benchmark / scenarios / base.py

diff --git a/yardstick/benchmark/scenarios/base.py b/yardstick/benchmark/scenarios/base.py
index 540acca..10a7288 100644 (file)
--- a/yardstick/benchmark/scenarios/base.py
+++ b/yardstick/benchmark/scenarios/base.py
@@ -1,29 +1,101 @@
-##############################################################################
-# Copyright (c) 2015 Ericsson AB and others.
+# Copyright 2013: Mirantis Inc.
+# All Rights Reserved.
 #
-# All rights reserved. This program and the accompanying materials
-# are made available under the terms of the Apache License, Version 2.0
-# which accompanies this distribution, and is available at
-# http://www.apache.org/licenses/LICENSE-2.0
-##############################################################################
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+# yardstick comment: this is a modified copy of
+# rally/rally/benchmark/scenarios/base.py
 
-""" Scenario base class
-"""
+from stevedore import extension
 
 import yardstick.common.utils as utils
 
 
+def _iter_scenario_classes(scenario_type=None):
+    """Generator over all 'Scenario' subclasses
+
+    This function will iterate over all 'Scenario' subclasses defined in this
+    project and will load any class introduced by any installed plugin project,
+    defined in 'entry_points' section, under 'yardstick.scenarios' subsection.
+    """
+    extension.ExtensionManager(namespace='yardstick.scenarios',
+                               invoke_on_load=False)
+    for scenario in utils.itersubclasses(Scenario):
+        if not scenario_type:
+            yield scenario
+        elif getattr(scenario, '__scenario_type__', None) == scenario_type:
+            yield scenario
+
+
 class Scenario(object):
 
-    def run(self, args):
+    def setup(self):
+        """ default impl for scenario setup """
         pass
 
+    def run(self, *args):
+        """ catcher for not implemented run methods in subclasses """
+        raise RuntimeError("run method not implemented")
+
+    def teardown(self):
+        """ default impl for scenario teardown """
+        pass
+
+    @staticmethod
+    def get_types():
+        """return a list of known runner type (class) names"""
+        scenarios = []
+        for scenario in _iter_scenario_classes():
+            scenarios.append(scenario)
+        return scenarios
+
+    @staticmethod
+    def get_cls(scenario_type):
+        """return class of specified type"""
+        for scenario in _iter_scenario_classes(scenario_type):
+            return scenario
+
+        raise RuntimeError("No such scenario type %s" % scenario_type)
+
     @staticmethod
     def get(scenario_type):
         """Returns instance of a scenario runner for execution type.
         """
-        for scenario in utils.itersubclasses(Scenario):
-            if scenario_type == scenario.__scenario_type__:
-                return scenario.__module__ + "." + scenario.__name__
+        scenario = Scenario.get_cls(scenario_type)
+        return scenario.__module__ + "." + scenario.__name__
 
-        raise RuntimeError("No such scenario type %s" % scenario_type)
+    @classmethod
+    def get_scenario_type(cls):
+        """Return a string with the scenario type, if defined"""
+        return str(getattr(cls, '__scenario_type__', None))
+
+    @classmethod
+    def get_description(cls):
+        """Return a single line string with the class description
+
+        This function will retrieve the class docstring and return the first
+        line, or 'None' if it's empty.
+        """
+        return cls.__doc__.splitlines()[0] if cls.__doc__ else str(None)
+
+    def _push_to_outputs(self, keys, values):
+        return dict(zip(keys, values))
+
+    def _change_obj_to_dict(self, obj):
+        dic = {}
+        for k, v in vars(obj).items():
+            try:
+                vars(v)
+            except TypeError:
+                dic[k] = v
+        return dic