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-rw-r--r--src/python/grpcio/grpc/__init__.py8
-rw-r--r--src/python/grpcio/grpc/_server.py19
-rw-r--r--src/python/grpcio_tests/tests/tests.json1
-rw-r--r--src/python/grpcio_tests/tests/unit/_server_test.py52
4 files changed, 76 insertions, 4 deletions
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index d1477fbeb5..996d075446 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -1656,9 +1656,11 @@ def server(thread_pool,
A Server object.
"""
from grpc import _server # pylint: disable=cyclic-import
- return _server.Server(thread_pool, () if handlers is None else handlers, ()
- if interceptors is None else interceptors, () if
- options is None else options, maximum_concurrent_rpcs)
+ return _server.create_server(thread_pool, ()
+ if handlers is None else handlers, ()
+ if interceptors is None else interceptors, ()
+ if options is None else options,
+ maximum_concurrent_rpcs)
################################### __all__ #################################
diff --git a/src/python/grpcio/grpc/_server.py b/src/python/grpcio/grpc/_server.py
index 2761022f21..7276a7fd90 100644
--- a/src/python/grpcio/grpc/_server.py
+++ b/src/python/grpcio/grpc/_server.py
@@ -789,7 +789,16 @@ def _start(state):
thread.start()
-class Server(grpc.Server):
+def _validate_generic_rpc_handlers(generic_rpc_handlers):
+ for generic_rpc_handler in generic_rpc_handlers:
+ service_attribute = getattr(generic_rpc_handler, 'service', None)
+ if service_attribute is None:
+ raise AttributeError(
+ '"{}" must conform to grpc.GenericRpcHandler type but does '
+ 'not have "service" method!'.format(generic_rpc_handler))
+
+
+class _Server(grpc.Server):
# pylint: disable=too-many-arguments
def __init__(self, thread_pool, generic_handlers, interceptors, options,
@@ -802,6 +811,7 @@ class Server(grpc.Server):
thread_pool, maximum_concurrent_rpcs)
def add_generic_rpc_handlers(self, generic_rpc_handlers):
+ _validate_generic_rpc_handlers(generic_rpc_handlers)
_add_generic_handlers(self._state, generic_rpc_handlers)
def add_insecure_port(self, address):
@@ -819,3 +829,10 @@ class Server(grpc.Server):
def __del__(self):
_stop(self._state, None)
+
+
+def create_server(thread_pool, generic_rpc_handlers, interceptors, options,
+ maximum_concurrent_rpcs):
+ _validate_generic_rpc_handlers(generic_rpc_handlers)
+ return _Server(thread_pool, generic_rpc_handlers, interceptors, options,
+ maximum_concurrent_rpcs)
diff --git a/src/python/grpcio_tests/tests/tests.json b/src/python/grpcio_tests/tests/tests.json
index 65460a9540..ebc41c63f0 100644
--- a/src/python/grpcio_tests/tests/tests.json
+++ b/src/python/grpcio_tests/tests/tests.json
@@ -53,6 +53,7 @@
"unit._server_ssl_cert_config_test.ServerSSLCertReloadTestCertConfigReuse",
"unit._server_ssl_cert_config_test.ServerSSLCertReloadTestWithClientAuth",
"unit._server_ssl_cert_config_test.ServerSSLCertReloadTestWithoutClientAuth",
+ "unit._server_test.ServerTest",
"unit._session_cache_test.SSLSessionCacheTest",
"unit.beta._beta_features_test.BetaFeaturesTest",
"unit.beta._beta_features_test.ContextManagementAndLifecycleTest",
diff --git a/src/python/grpcio_tests/tests/unit/_server_test.py b/src/python/grpcio_tests/tests/unit/_server_test.py
new file mode 100644
index 0000000000..acf4a17921
--- /dev/null
+++ b/src/python/grpcio_tests/tests/unit/_server_test.py
@@ -0,0 +1,52 @@
+# Copyright 2018 The gRPC Authors.
+#
+# 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.
+
+from concurrent import futures
+import unittest
+
+import grpc
+
+
+class _ActualGenericRpcHandler(grpc.GenericRpcHandler):
+
+ def service(self, handler_call_details):
+ return None
+
+
+class ServerTest(unittest.TestCase):
+
+ def test_not_a_generic_rpc_handler_at_construction(self):
+ with self.assertRaises(AttributeError) as exception_context:
+ grpc.server(
+ futures.ThreadPoolExecutor(max_workers=5),
+ handlers=[
+ _ActualGenericRpcHandler(),
+ object(),
+ ])
+ self.assertIn('grpc.GenericRpcHandler',
+ str(exception_context.exception))
+
+ def test_not_a_generic_rpc_handler_after_construction(self):
+ server = grpc.server(futures.ThreadPoolExecutor(max_workers=5))
+ with self.assertRaises(AttributeError) as exception_context:
+ server.add_generic_rpc_handlers([
+ _ActualGenericRpcHandler(),
+ object(),
+ ])
+ self.assertIn('grpc.GenericRpcHandler',
+ str(exception_context.exception))
+
+
+if __name__ == '__main__':
+ unittest.main(verbosity=2)