Add basic timing support

Add support for --timing options.  Use cliff via a pseudo-command
'Timing' to support multiple outputformats.

If an output format other than the default 'table' is selected
use CSV since the timing data is in list form.

Will pick up timing data for any client object that has a method
similar to novaclient's get_timings().

TODO:
* Stop instantiating all of the clientmanager client objects just
  to check for timing data.  Descriptor magic required?

Change-Id: I7f1076b7a250fba6a8b24b2ae9353a7f51b792b2

2 files changed, 47 insertions, 2 deletions

diff --git a/openstackclient/common/clientmanager.py b/openstackclient/common/clientmanager.py
index b310f3ac..a2f85aff 100644
--- a/openstackclient/common/clientmanager.py
+++ b/openstackclient/common/clientmanager.py
@@ -49,7 +49,7 @@ class ClientManager(object):
                  user_domain_id=None, user_domain_name=None,
                  project_domain_id=None, project_domain_name=None,
                  region_name=None, api_version=None, verify=True,
-                 trust_id=None):
+                 trust_id=None, timing=None):
         self._token = token
         self._url = url
         self._auth_url = auth_url
@@ -67,6 +67,7 @@ class ClientManager(object):
         self._api_version = api_version
         self._trust_id = trust_id
         self._service_catalog = None
+        self.timing = timing
 
         # verify is the Requests-compatible form
         self._verify = verify
@@ -116,7 +117,7 @@ def get_extension_modules(group):
 
         setattr(
             ClientManager,
-            ep.name,
+            module.API_NAME,
             ClientCache(
                 getattr(sys.modules[ep.module_name], 'make_client', None)
             ),
diff --git a/openstackclient/common/timing.py b/openstackclient/common/timing.py
new file mode 100644
index 00000000..1c94682c
--- /dev/null
+++ b/openstackclient/common/timing.py
@@ -0,0 +1,44 @@
+#   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.
+#
+
+"""Timing Implementation"""
+
+import logging
+
+from cliff import lister
+
+
+class Timing(lister.Lister):
+    """Show timing data"""
+
+    log = logging.getLogger(__name__ + '.Timing')
+
+    def take_action(self, parsed_args):
+        self.log.debug('take_action(%s)' % parsed_args)
+
+        column_headers = (
+            'URL',
+            'Seconds',
+        )
+
+        results = []
+        total = 0.0
+        for url, start, end in self.app.timing_data:
+            seconds = end - start
+            total += seconds
+            results.append((url, seconds))
+        results.append(('Total', total))
+        return (
+            column_headers,
+            results,
+        )