1 files changed, 19 insertions, 0 deletions
diff --git a/src/lib/Bcfg2/Server/Plugin/interfaces.py b/src/lib/Bcfg2/Server/Plugin/interfaces.py
index 7909eaa03..ed4afb9b2 100644
--- a/src/lib/Bcfg2/Server/Plugin/interfaces.py
+++ b/src/lib/Bcfg2/Server/Plugin/interfaces.py
@@ -630,3 +630,22 @@ class ClientACLs(object):
         :returns: bool
         """
         return True
+
+
+class Caching(object):
+    """ A plugin that caches more than just the data received from the
+    FAM.  This presents a unified interface to clear the cache. """
+
+    def expire_cache(self, key=None):
+        """ Expire the cache associated with the given key.
+
+        :param key: The key to expire the cache for.  Because cache
+                    implementations vary tremendously between plugins,
+                    this could be any number of things, but generally
+                    a hostname.  It also may or may not be possible to
+                    expire the cache for a single host; this interface
+                    does not require any guarantee about that.
+        :type key: varies
+        :returns: None
+        """
+        raise NotImplementedError