Support to batch delete database instances

Allow users to delete database instances in batch, usage:

usage: openstack database instance delete [-h] instance [instance ...]

Change-Id: I88a15ba1910f7b3294067b54ae4a7a9b4c4a17a5

releasenotes/notes/bulk-delete-database-instances-7938121487fb11e9.yaml

@@ -0,0 +1,2 @@
+features:
+  - Allow users to delete database instances in batch.

troveclient/osc/v1/base.py

@@ -0,0 +1,34 @@
+# Copyright 2019 Catalyst Cloud Ltd.
+#
+#    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 osc_lib.command import command
+from osc_lib import exceptions
+
+
+class TroveDeleter(command.Command):
+    def delete_resources(self, ids):
+        """Delete one or more resources."""
+        failure_flag = False
+        success_msg = "Request to delete %s %s has been accepted."
+        error_msg = "Unable to delete the specified %s(s)."
+
+        for id in ids:
+            try:
+                self.delete_func(id)
+                print(success_msg % (self.resource, id))
+            except Exception as e:
+                failure_flag = True
+                print(e)
+
+        if failure_flag:
+            raise exceptions.CommandError(error_msg % self.resource)

troveclient/osc/v1/database_instances.py

@@ -13,12 +13,16 @@
 """Database v1 Instances action implementations"""
 
 import argparse
+import six
+
 from osc_lib.command import command
 from osc_lib import exceptions
 from osc_lib import utils as osc_utils
-import six
+from oslo_utils import uuidutils
 
 from troveclient.i18n import _
+from troveclient.osc.v1 import base
+from troveclient import utils as trove_utils
 
 
 def set_attributes_for_print(instances):
@@ -155,29 +159,41 @@ class ShowDatabaseInstance(command.ShowOne):
         return zip(*sorted(six.iteritems(instance)))
 
 
-class DeleteDatabaseInstance(command.Command):
-
+class DeleteDatabaseInstance(base.TroveDeleter):
     _description = _("Deletes an instance.")
 
     def get_parser(self, prog_name):
         parser = super(DeleteDatabaseInstance, self).get_parser(prog_name)
         parser.add_argument(
             'instance',
-            metavar='<instance>',
-            help=_('ID or name of the Instance'),
+            nargs='+',
+            metavar='instance',
+            help='Id or name of instance(s).'
         )
         return parser
 
     def take_action(self, parsed_args):
         db_instances = self.app.client_manager.database.instances
-        try:
-            instance = osc_utils.find_resource(db_instances,
-                                               parsed_args.instance)
-            db_instances.delete(instance)
-        except Exception as e:
-            msg = (_("Failed to delete instance %(instance)s: %(e)s")
-                   % {'instance': parsed_args.instance, 'e': e})
-            raise exceptions.CommandError(msg)
+
+        # Used for batch deletion
+        self.delete_func = db_instances.delete
+        self.resource = 'database instance'
+
+        ids = []
+        for instance_id in parsed_args.instance:
+            if not uuidutils.is_uuid_like(instance_id):
+                try:
+                    instance_id = trove_utils.get_resource_id_by_name(
+                        db_instances, instance_id
+                    )
+                except Exception as e:
+                    msg = ("Failed to get database instance %s, error: %s" %
+                           (instance_id, str(e)))
+                    raise exceptions.CommandError(msg)
+
+            ids.append(instance_id)
+
+        self.delete_resources(ids)
 
 
 class CreateDatabaseInstance(command.ShowOne):

troveclient/tests/osc/v1/test_database_instances.py

@@ -14,6 +14,7 @@ import mock
 
 from osc_lib import exceptions
 from osc_lib import utils
+from oslo_utils import uuidutils
 
 from troveclient import common
 from troveclient.osc.v1 import database_instances
@@ -119,25 +120,44 @@ class TestDatabaseInstanceDelete(TestInstances):
         super(TestDatabaseInstanceDelete, self).setUp()
         self.cmd = database_instances.DeleteDatabaseInstance(self.app, None)
 
-    @mock.patch.object(utils, 'find_resource')
-    def test_instance_delete(self, mock_find):
-        args = ['instance1']
-        mock_find.return_value = args[0]
-        parsed_args = self.check_parser(self.cmd, args, [])
-        result = self.cmd.take_action(parsed_args)
-        self.instance_client.delete.assert_called_with('instance1')
-        self.assertIsNone(result)
+    @mock.patch("troveclient.utils.get_resource_id_by_name")
+    def test_instance_delete(self, mock_getid):
+        mock_getid.return_value = "fake_uuid"
+
+        args = ['instance1']
+        parsed_args = self.check_parser(self.cmd, args, [])
+        self.cmd.take_action(parsed_args)
+
+        mock_getid.assert_called_once_with(self.instance_client, "instance1")
+        self.instance_client.delete.assert_called_with('fake_uuid')
+
+    @mock.patch("troveclient.utils.get_resource_id_by_name")
+    def test_instance_delete_with_exception(self, mock_getid):
+        mock_getid.side_effect = exceptions.CommandError
 
-    @mock.patch.object(utils, 'find_resource')
-    def test_instance_delete_with_exception(self, mock_find):
         args = ['fakeinstance']
         parsed_args = self.check_parser(self.cmd, args, [])
 
-        mock_find.side_effect = exceptions.CommandError
         self.assertRaises(exceptions.CommandError,
                           self.cmd.take_action,
                           parsed_args)
 
+    @mock.patch("troveclient.utils.get_resource_id_by_name")
+    def test_instance_bulk_delete(self, mock_getid):
+        instance_1 = uuidutils.generate_uuid()
+        instance_2 = uuidutils.generate_uuid()
+        mock_getid.return_value = instance_1
+
+        args = ["fake_instance", instance_2]
+        parsed_args = self.check_parser(self.cmd, args, [])
+        self.cmd.take_action(parsed_args)
+
+        mock_getid.assert_called_once_with(self.instance_client,
+                                           "fake_instance")
+
+        calls = [mock.call(instance_1), mock.call(instance_2)]
+        self.instance_client.delete.assert_has_calls(calls)
+
 
 class TestDatabaseInstanceCreate(TestInstances):
 

troveclient/utils.py

@@ -210,6 +210,11 @@ def print_dict(d, property="Property"):
     _print(pt, property)
 
 
+def get_resource_id_by_name(manager, name):
+    resource = manager.find(name=name)
+    return resource.id
+
+
 def find_resource(manager, name_or_id):
     """Helper for the _find_* methods."""
     # first try to get entity as integer id