Add google-endpoints to third_party/.

third_party/google-endpoints/dogpile/cache/backends/null.py

+"""
+Null Backend
+-------------
+
+The Null backend does not do any caching at all.  It can be
+used to test behavior without caching, or as a means of disabling
+caching for a region that is otherwise used normally.
+
+.. versionadded:: 0.5.4
+
+"""
+
+from ..api import CacheBackend, NO_VALUE
+
+
+__all__ = ['NullBackend']
+
+
+class NullLock(object):
+    def acquire(self, wait=True):
+        return True
+
+    def release(self):
+        pass
+
+
+class NullBackend(CacheBackend):
+    """A "null" backend that effectively disables all cache operations.
+
+    Basic usage::
+
+        from dogpile.cache import make_region
+
+        region = make_region().configure(
+            'dogpile.cache.null'
+        )
+
+    """
+
+    def __init__(self, arguments):
+        pass
+
+    def get_mutex(self, key):
+        return NullLock()
+
+    def get(self, key):
+        return NO_VALUE
+
+    def get_multi(self, keys):
+        return [NO_VALUE for k in keys]
+
+    def set(self, key, value):
+        pass
+
+    def set_multi(self, mapping):
+        pass
+
+    def delete(self, key):
+        pass
+
+    def delete_multi(self, keys):
+        pass