[refactor] init_caching instead of setting attr

As meskio found commented, setting this attribute directly is ugly,
CouchDatabase now has a init_caching method for setting up cache
instance.

1 files changed, 9 insertions, 0 deletions

diff --git a/common/src/leap/soledad/common/couch.py b/common/src/leap/soledad/common/couch.py
index 014b3f38..00a17715 100644
--- a/common/src/leap/soledad/common/couch.py
+++ b/common/src/leap/soledad/common/couch.py
@@ -443,6 +443,15 @@ class CouchDatabase(CommonBackend):
         else:
             return {}
 
+    def init_caching(self, cache):
+        """
+        Start using cache by setting internal _cache attribute.
+
+        :param cache: the cache instance, anything that behaves like a dict
+        :type cache: dict
+        """
+        self._cache = cache
+
     def ensure_ddocs_on_db(self):
         """
         Ensure that the design documents used by the backend exist on the