move nearly everything into /src to make git.io/gam cleaner w/o a readme tree

src/googleapiclient/discovery_cache/appengine_memcache.py

@@ -0,0 +1,52 @@
+# Copyright 2014 Google Inc. All Rights Reserved.
+#
+# 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.
+
+"""App Engine memcache based cache for the discovery document."""
+
+import logging
+
+# This is only an optional dependency because we only import this
+# module when google.appengine.api.memcache is available.
+from google.appengine.api import memcache
+
+from . import base
+from ..discovery_cache import DISCOVERY_DOC_MAX_AGE
+
+NAMESPACE = 'google-api-client'
+
+
+class Cache(base.Cache):
+  """A cache with app engine memcache API."""
+
+  def __init__(self, max_age):
+      """Constructor.
+
+      Args:
+        max_age: Cache expiration in seconds.
+      """
+      self._max_age = max_age
+
+  def get(self, url):
+    try:
+      return memcache.get(url, namespace=NAMESPACE)
+    except Exception as e:
+      logging.warning(e, exc_info=True)
+
+  def set(self, url, content):
+    try:
+      memcache.set(url, content, time=int(self._max_age), namespace=NAMESPACE)
+    except Exception as e:
+      logging.warning(e, exc_info=True)
+
+cache = Cache(max_age=DISCOVERY_DOC_MAX_AGE)