Adding endpoints multiapi sample.

appengine/endpoints/multiapi/app.yaml

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+runtime: python27
+threadsafe: true
+api_version: 1
+
+handlers:
+# The endpoints handler must be mapped to /_ah/spi.
+# Apps send requests to /_ah/api, but the endpoints service handles mapping
+# those requests to /_ah/spi.
+- url: /_ah/spi/.*
+  script: main.api
+
+libraries:
+- name: pycrypto
+  version: 2.6
+- name: endpoints
+  version: 1.0

appengine/endpoints/multiapi/main.py

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+# Copyright 2016 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.
+
+"""This is a sample multi-class API implemented using Cloud Ednpoints"""
+
+import endpoints
+from protorpc import messages
+from protorpc import remote
+
+
+class Request(messages.Message):
+    message = messages.StringField(1)
+
+
+class Response(messages.Message):
+    message = messages.StringField(1)
+
+
+# [START multiclass]
+api_collection = endpoints.api(name='library', version='v1.0')
+
+
+@api_collection.api_class(resource_name='shelves')
+class Shelves(remote.Service):
+
+    @endpoints.method(Request, Response, path='list')
+    def list(self, request):
+        return Response()
+
+
+@api_collection.api_class(resource_name='books', path='books')
+class Books(remote.Service):
+
+    @endpoints.method(Request, Response, path='bookmark')
+    def bookmark(self, request):
+        return Response()
+# [END multiclass]
+
+# [START api_server]
+api = endpoints.api_server([api_collection])
+# [END api_server]

appengine/endpoints/multiapi/main_test.py

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+# Copyright 2016 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.
+
+import main
+
+
+def test_shelves(testbed):
+    api = main.Shelves()
+    response = api.list(main.Request())
+    assert response
+
+
+def test_books(testbed):
+    api = main.Books()
+    response = api.bookmark(main.Request())
+    assert response