Code refactoring - Watcher Applier package

This patchset is there to change the code structure.
The objective is to flatten the project file tree by merging
'api/' and 'framework/' into a single package. This also contains
some tidy ups in package naming (like using only singular nouns).

This should only affect file/folder names and their subsequent
import paths wherever they were used.

Change-Id: Id7b37667c613086d8ef3cd1f367c4219bf026fc7

watcher/applier/messaging/applier_command.py

@@ -0,0 +1,29 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
+#
+# 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 abc
+import six
+
+
+@six.add_metaclass(abc.ABCMeta)
+class ApplierCommand(object):
+    @abc.abstractmethod
+    def execute(self):
+        raise NotImplementedError(
+            "Should have implemented this")  # pragma:no cover

watcher/applier/messaging/events.py

@@ -0,0 +1,25 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
+#
+# 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.
+#
+
+from enum import Enum
+
+
+class Events(Enum):
+    LAUNCH_ACTION_PLAN = "launch_action_plan"
+    LAUNCH_ACTION = "launch_action"

watcher/applier/messaging/launcher.py

@@ -0,0 +1,68 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
+#
+# 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.
+#
+from oslo_log import log
+
+from watcher.applier.default import DefaultApplier
+from watcher.applier.messaging.applier_command import ApplierCommand
+from watcher.applier.messaging.events import Events
+from watcher.common.messaging.events.event import Event
+from watcher.objects.action_plan import ActionPlan
+from watcher.objects.action_plan import Status
+
+LOG = log.getLogger(__name__)
+
+
+class LaunchActionPlanCommand(ApplierCommand):
+    def __init__(self, context, manager_applier, action_plan_uuid):
+        super(LaunchActionPlanCommand, self).__init__()
+        self.ctx = context
+        self.action_plan_uuid = action_plan_uuid
+        self.manager_applier = manager_applier
+
+    def notify(self, uuid, event_type, status):
+        action_plan = ActionPlan.get_by_uuid(self.ctx, uuid)
+        action_plan.state = status
+        action_plan.save()
+        event = Event()
+        event.set_type(event_type)
+        event.set_data({})
+        payload = {'action_plan__uuid': uuid,
+                   'action_plan_status': status}
+        self.manager_applier.topic_status.publish_event(event.get_type().name,
+                                                        payload)
+
+    def execute(self):
+        try:
+            # update state
+            self.notify(self.action_plan_uuid,
+                        Events.LAUNCH_ACTION_PLAN,
+                        Status.ONGOING)
+            applier = DefaultApplier(self.manager_applier, self.ctx)
+            result = applier.execute(self.action_plan_uuid)
+        except Exception as e:
+            result = False
+            LOG.error("Launch Action Plan " + unicode(e))
+        finally:
+            if result is True:
+                status = Status.SUCCEEDED
+            else:
+                status = Status.FAILED
+            # update state
+            self.notify(self.action_plan_uuid, Events.LAUNCH_ACTION_PLAN,
+                        status)

watcher/applier/messaging/trigger.py

@@ -0,0 +1,45 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
+#
+# 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.
+#
+from oslo_log import log
+
+from watcher.applier.messaging.launcher import LaunchActionPlanCommand
+
+LOG = log.getLogger(__name__)
+
+
+class TriggerActionPlan(object):
+    def __init__(self, manager_applier):
+        self.manager_applier = manager_applier
+
+    def do_launch_action_plan(self, context, action_plan_uuid):
+        try:
+            cmd = LaunchActionPlanCommand(context,
+                                          self.manager_applier,
+                                          action_plan_uuid)
+            cmd.execute()
+        except Exception as e:
+            LOG.error("do_launch_action_plan " + unicode(e))
+
+    def launch_action_plan(self, context, action_plan_uuid):
+        LOG.debug("Trigger ActionPlan %s" % action_plan_uuid)
+        # submit
+        self.manager_applier.executor.submit(self.do_launch_action_plan,
+                                             context,
+                                             action_plan_uuid)
+        return action_plan_uuid