1 files changed, 73 insertions, 0 deletions
diff --git a/keystone-moon/keystone/contrib/revoke/backends/kvs.py b/keystone-moon/keystone/contrib/revoke/backends/kvs.py
new file mode 100644
index 00000000..cc41fbee
--- /dev/null
+++ b/keystone-moon/keystone/contrib/revoke/backends/kvs.py
@@ -0,0 +1,73 @@
+# 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 datetime
+
+from oslo_config import cfg
+from oslo_utils import timeutils
+
+from keystone.common import kvs
+from keystone.contrib import revoke
+from keystone import exception
+from keystone.openstack.common import versionutils
+
+
+CONF = cfg.CONF
+
+_EVENT_KEY = 'os-revoke-events'
+_KVS_BACKEND = 'openstack.kvs.Memory'
+
+
+class Revoke(revoke.Driver):
+
+    @versionutils.deprecated(
+        versionutils.deprecated.JUNO,
+        in_favor_of='keystone.contrib.revoke.backends.sql',
+        remove_in=+1,
+        what='keystone.contrib.revoke.backends.kvs')
+    def __init__(self, **kwargs):
+        super(Revoke, self).__init__()
+        self._store = kvs.get_key_value_store('os-revoke-driver')
+        self._store.configure(backing_store=_KVS_BACKEND, **kwargs)
+
+    def _list_events(self):
+        try:
+            return self._store.get(_EVENT_KEY)
+        except exception.NotFound:
+            return []
+
+    def _prune_expired_events_and_get(self, last_fetch=None, new_event=None):
+        pruned = []
+        results = []
+        expire_delta = datetime.timedelta(seconds=CONF.token.expiration)
+        oldest = timeutils.utcnow() - expire_delta
+        # TODO(ayoung): Store the time of the oldest event so that the
+        # prune process can be skipped if none of the events have timed out.
+        with self._store.get_lock(_EVENT_KEY) as lock:
+            events = self._list_events()
+            if new_event is not None:
+                events.append(new_event)
+
+            for event in events:
+                revoked_at = event.revoked_at
+                if revoked_at > oldest:
+                    pruned.append(event)
+                    if last_fetch is None or revoked_at > last_fetch:
+                        results.append(event)
+            self._store.set(_EVENT_KEY, pruned, lock)
+        return results
+
+    def list_events(self, last_fetch=None):
+        return self._prune_expired_events_and_get(last_fetch=last_fetch)
+
+    def revoke(self, event):
+        self._prune_expired_events_and_get(new_event=event)