Add dogpile.cache.pymemcache backend

Depends-On: https://review.opendev.org/c/openstack/requirements/+/772684
Change-Id: Ibdc6015ac1a9812976c4f3d8a737f7245599553e
Signed-off-by: Moisés Guimarães de Medeiros <moguimar@redhat.com>

.zuul.yaml

@@ -37,6 +37,13 @@
       tox_environment:
           OSLO_BACKEND: dogpile_cache_bmemcached
 
+- job:
+    name: oslo.cache-functional-dogpile.cache.pymemcache
+    parent: oslo.cache-functional-memcached
+    vars:
+      tox_environment:
+          OSLO_BACKEND: dogpile_cache_pymemcache
+
 - job:
     name: oslo.cache-functional-memcache_pool
     parent: oslo.cache-functional-memcached
@@ -56,4 +63,5 @@
       jobs:
         - oslo.cache-functional-etcd3gw
         - oslo.cache-functional-dogpile.cache.bmemcached
+        - oslo.cache-functional-dogpile.cache.pymemcache
         - oslo.cache-functional-memcache_pool

lower-constraints.txt

@@ -6,7 +6,7 @@ cliff==3.1.0
 cmd2==0.8.9
 debtcollector==2.1.0
 decorator==4.4.2
-dogpile.cache==1.0.2
+dogpile.cache==1.1.2
 entrypoints==0.3
 etcd3gw==0.2.0
 extras==1.0.0
@@ -37,6 +37,7 @@ pifpaf==0.10.0
 prettytable==0.7.2
 pycparser==2.18
 pyinotify==0.9.6
+pymemcache==3.4.0
 pymongo==3.0.2
 pyparsing==2.2.0
 pyperclip==1.8.0

oslo_cache/_opts.py

@@ -38,6 +38,7 @@ FILE_OPTIONS = {
                             'oslo_cache.dict',
                             'oslo_cache.mongo',
                             'oslo_cache.etcd3gw',
+                            'dogpile.cache.pymemcache',
                             'dogpile.cache.memcached',
                             'dogpile.cache.pylibmc',
                             'dogpile.cache.bmemcached',

oslo_cache/tests/functional/dogpile_cache_pymemcache/test_cache_backend.py

@@ -0,0 +1,29 @@
+#    Copyright 2021 Red Hat, Inc.
+#
+#    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_cache.tests.functional import test_base
+
+
+class TestDogpileCachePyMemcacheBackend(test_base.BaseTestCaseCacheBackend):
+    def setUp(self):
+        self.config_fixture.config(
+            group="cache",
+            backend="dogpile.cache.pymemcache",
+            memcache_servers="localhost:11212",
+        )
+
+        # NOTE(hberaud): super must be called after all to ensure that
+        # config fixture is properly initialized with value related to
+        # the current backend in use.
+        super().setUp()

releasenotes/notes/add-dogpile.cache.pymemcache-backend-627d31a76013f8e1.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Added a new memcached driver that uses pymemcache through dogpile.cache.

requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-dogpile.cache>=1.0.2 # BSD
+dogpile.cache>=1.1.2 # BSD
 oslo.config>=8.1.0 # Apache-2.0
 oslo.i18n>=5.0.0 # Apache-2.0
 oslo.log>=4.2.1 # Apache-2.0

test-requirements.txt

@@ -8,6 +8,7 @@ pifpaf>=0.10.0 # Apache-2.0
 bandit>=1.6.0,<1.7.0 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
 pre-commit>=2.6.0 # MIT
+pymemcache>=3.4.0 # Apache-2.0
 python-binary-memcached>=0.29.0 # MIT
 python-memcached>=1.56 # PSF
 pymongo!=3.1,>=3.0.2 # Apache-2.0