Replaces methods deprecated in pymongo3.0

Methods insert, find_and_modify, update and MongoReplicaSetClient are
deprecated in pymongo3.0.  They were replaced with appropriate
insert_one, find_one_and _update, upte_one, MongoClient consistently.

Change-Id: I1fdc15ed5d21227d2070052a771ce4f3aec94c47
Closes-Bug: #1467856

ceilometer/event/storage/pymongo_base.py

@@ -58,7 +58,7 @@ class Connection(base.Connection):
                                    'trait_type': trait.dtype,
                                    'trait_value': trait.value})
             try:
-                self.db.event.insert(
+                self.db.event.insert_one(
                     {'_id': event_model.message_id,
                      'event_type': event_model.event_type,
                      'timestamp': event_model.generated,

ceilometer/storage/impl_db2.py

@@ -179,11 +179,11 @@ class Connection(pymongo_base.Connection):
             # for their ENV.
             resource_id = self._generate_random_str(
                 cfg.CONF.database.db2nosql_resource_id_maxlen)
-            self.db.resource.insert({'_id': resource_id,
+            self.db.resource.insert_one({'_id': resource_id,
                                          'no_key': resource_id})
             meter_id = str(bson.objectid.ObjectId())
             timestamp = timeutils.utcnow()
-            self.db.meter.insert({'_id': meter_id,
+            self.db.meter.insert_one({'_id': meter_id,
                                       'no_key': meter_id,
                                       'timestamp': timestamp})
 
@@ -232,7 +232,7 @@ class Connection(pymongo_base.Connection):
         data = copy.deepcopy(data)
         data['resource_metadata'] = pymongo_utils.improve_keys(
             data.pop('resource_metadata'))
-        self.db.resource.update(
+        self.db.resource.update_one(
             {'_id': data['resource_id']},
             {'$set': {'project_id': data['project_id'],
                       'user_id': data['user_id'] or 'null',
@@ -257,7 +257,7 @@ class Connection(pymongo_base.Connection):
         # automatically.
         if record.get('_id') is None:
             record['_id'] = str(bson.objectid.ObjectId())
-        self.db.meter.insert(record)
+        self.db.meter.insert_one(record)
 
     def get_resources(self, user=None, project=None, source=None,
                       start_timestamp=None, start_timestamp_op=None,

ceilometer/storage/impl_mongodb.py

@@ -501,7 +501,7 @@ class Connection(pymongo_base.Connection):
         data = copy.deepcopy(data)
         data['resource_metadata'] = pymongo_utils.improve_keys(
             data.pop('resource_metadata'))
-        resource = self.db.resource.find_and_modify(
+        resource = self.db.resource.find_one_and_update(
             {'_id': data['resource_id']},
             {'$set': {'project_id': data['project_id'],
                       'user_id': data['user_id'],
@@ -518,7 +518,7 @@ class Connection(pymongo_base.Connection):
                            },
              },
             upsert=True,
-            new=True,
+            return_document=pymongo.ReturnDocument.AFTER,
         )
 
         # only update last sample timestamp if actually later (the usual
@@ -526,7 +526,7 @@ class Connection(pymongo_base.Connection):
         last_sample_timestamp = resource.get('last_sample_timestamp')
         if (last_sample_timestamp is None or
                 last_sample_timestamp <= data['timestamp']):
-            self.db.resource.update(
+            self.db.resource.update_one(
                 {'_id': data['resource_id']},
                 {'$set': {'metadata': data['resource_metadata'],
                           'last_sample_timestamp': data['timestamp']}}
@@ -540,7 +540,7 @@ class Connection(pymongo_base.Connection):
         first_sample_timestamp = resource.get('first_sample_timestamp')
         if (first_sample_timestamp is not None and
                 first_sample_timestamp > data['timestamp']):
-            self.db.resource.update(
+            self.db.resource.update_one(
                 {'_id': data['resource_id']},
                 {'$set': {'first_sample_timestamp': data['timestamp']}}
             )
@@ -550,7 +550,7 @@ class Connection(pymongo_base.Connection):
         # a new key '_id').
         record = copy.copy(data)
         record['recorded_at'] = timeutils.utcnow()
-        self.db.meter.insert(record)
+        self.db.meter.insert_one(record)
 
     def clear_expired_metering_data(self, ttl):
         """Clear expired data from the backend storage system.

ceilometer/storage/mongo/utils.py

@@ -253,13 +253,11 @@ class ConnectionPool(object):
     @staticmethod
     def _mongo_connect(url):
         try:
-            if cfg.CONF.database.mongodb_replica_set:
             client = MongoProxy(
-                    pymongo.MongoReplicaSetClient(
+                pymongo.MongoClient(
-                        url,
+                    url, replicaSet=cfg.CONF.database.mongodb_replica_set
-                        replicaSet=cfg.CONF.database.mongodb_replica_set))
+                )
-            else:
+            )
-                client = MongoProxy(pymongo.MongoClient(url))
             return client
         except pymongo.errors.ConnectionFailure as e:
             LOG.warn(_('Unable to connect to the database server: '

ceilometer/tests/storage/test_impl_db2.py

@@ -114,10 +114,10 @@ class ConnectionTest(test_base.BaseTestCase):
                               group='database')
         impl_db2.Connection('db2://user:pwd@localhost:27017/ceilodb2')
         resource_id = 'wew' * 247 + 'x' * 3
-        conn_mock.ceilodb2.resource.insert.assert_called_with(
+        conn_mock.ceilodb2.resource.insert_one.assert_called_with(
             {'_id': resource_id,
              'no_key': resource_id})
-        conn_mock.ceilodb2.meter.insert.assert_called_with(
+        conn_mock.ceilodb2.meter.insert_one.assert_called_with(
             {'_id': '54b8860d75bfe43b54e84ce7',
              'no_key': '54b8860d75bfe43b54e84ce7',
              'timestamp': 'timestamp'})