old_contents: # vim: tabstop=4 shiftwidth=4 softtabstop=4
  
  # Copyright 2012 Midokura Japan K.K.
  #
  #    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
  
  import webob
  
  from nova.api.openstack import extensions
  from nova.api.openstack import wsgi
  from nova import compute
  from nova import exception
  from nova import log as logging
  
  
  LOG = logging.getLogger(__name__)
  
  
  class ServerStartStopActionController(wsgi.Controller):
      def __init__(self, *args, **kwargs):
          super(ServerStartStopActionController, self).__init__(*args, **kwargs)
          self.compute_api = compute.API()
  
      def _get_instance(self, context, instance_uuid):
          try:
              return self.compute_api.get(context, instance_uuid)
          except exception.NotFound:
              msg = _("Instance not found")
              raise webob.exc.HTTPNotFound(explanation=msg)
  
      @wsgi.action('os-start')
      def _start_server(self, req, id, body):
          """Start an instance. """
          context = req.environ['nova.context']
          LOG.debug(_("start instance %r"), id)
          instance = self._get_instance(context, id)
          self.compute_api.start(context, instance)
          return webob.Response(status_int=202)
  
      @wsgi.action('os-stop')
      def _stop_server(self, req, id, body):
          """Stop an instance."""
          context = req.environ['nova.context']
          LOG.debug(_("stop instance %r"), id)
          instance = self._get_instance(context, id)
          self.compute_api.stop(context, instance)
          return webob.Response(status_int=202)
  
  
  class Server_start_stop(extensions.ExtensionDescriptor):
      """Start/Stop instance compute API support"""
  
      name = "ServerStartStop"
      alias = "os-server-start-stop"
      namespace = "http://docs.openstack.org/compute/ext/servers/api/v1.1"
      updated = "2012-01-23T00:00:00+00:00"
  
      def get_controller_extensions(self):
          controller = ServerStartStopActionController()
          extension = extensions.ControllerExtension(self, 'servers', controller)
          return [extension]
  
new_contents: # vim: tabstop=4 shiftwidth=4 softtabstop=4
  
  # Copyright 2012 Midokura Japan K.K.
  #
  #    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
  
  import webob
  
  from nova.api.openstack import extensions
  from nova.api.openstack import wsgi
  from nova import compute
  from nova import exception
  from nova import log as logging
  
  
  LOG = logging.getLogger(__name__)
  
  
  class ServerStartStopActionController(wsgi.Controller):
      def __init__(self, *args, **kwargs):
          super(ServerStartStopActionController, self).__init__(*args, **kwargs)
          self.compute_api = compute.API()
  
      def _get_instance(self, context, instance_uuid):
          try:
              return self.compute_api.get(context, instance_uuid)
          except exception.NotFound:
              msg = _("Instance not found")
              raise webob.exc.HTTPNotFound(explanation=msg)
  
      @wsgi.action('os-start')
      def _start_server(self, req, id, body):
          """Start an instance. """
          context = req.environ['nova.context']
          instance = self._get_instance(context, id)
          LOG.debug(_('start instance'), instance=instance)
          self.compute_api.start(context, instance)
          return webob.Response(status_int=202)
  
      @wsgi.action('os-stop')
      def _stop_server(self, req, id, body):
          """Stop an instance."""
          context = req.environ['nova.context']
          instance = self._get_instance(context, id)
          LOG.debug(_('stop instance'), instance=instance)
          self.compute_api.stop(context, instance)
          return webob.Response(status_int=202)
  
  
  class Server_start_stop(extensions.ExtensionDescriptor):
      """Start/Stop instance compute API support"""
  
      name = "ServerStartStop"
      alias = "os-server-start-stop"
      namespace = "http://docs.openstack.org/compute/ext/servers/api/v1.1"
      updated = "2012-01-23T00:00:00+00:00"
  
      def get_controller_extensions(self):
          controller = ServerStartStopActionController()
          extension = extensions.ControllerExtension(self, 'servers', controller)
          return [extension]
  
subject: Add instance to log messages.