Initial checkin of gRPC to third_party/

third_party/grpc/src/python/grpcio/tests/unit/framework/face/testing/base_util.py

Index: third_party/grpc/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
diff --git a/third_party/grpc/src/python/grpcio/tests/unit/framework/face/testing/base_util.py b/third_party/grpc/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
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@@ -0,0 +1,102 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Utilities for creating Base-layer objects for use in Face-layer tests."""
+
+import abc
+
+# interfaces is referenced from specification in this module.
+from grpc.framework.base import util as _base_util
+from grpc.framework.base import implementations
+from grpc.framework.base import in_memory
+from grpc.framework.base import interfaces  # pylint: disable=unused-import
+from grpc.framework.foundation import logging_pool
+
+_POOL_SIZE_LIMIT = 5
+
+_MAXIMUM_TIMEOUT = 90
+
+
+class LinkedPair(object):
+  """A Front and Back that are linked to one another.
+
+  Attributes:
+    front: An interfaces.Front.
+    back: An interfaces.Back.
+  """
+
+  __metaclass__ = abc.ABCMeta
+
+  @abc.abstractmethod
+  def shut_down(self):
+    """Shuts down this object and releases its resources."""
+    raise NotImplementedError()
+
+
+class _LinkedPair(LinkedPair):
+
+  def __init__(self, front, back, pools):
+    self.front = front
+    self.back = back
+    self._pools = pools
+
+  def shut_down(self):
+    _base_util.wait_for_idle(self.front)
+    _base_util.wait_for_idle(self.back)
+
+    for pool in self._pools:
+      pool.shutdown(wait=True)
+
+
+def linked_pair(servicer, default_timeout):
+  """Creates a Server and Stub linked together for use."""
+  link_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
+  front_work_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
+  front_transmission_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
+  front_utility_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
+  back_work_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
+  back_transmission_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
+  back_utility_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
+  pools = (
+      link_pool,
+      front_work_pool, front_transmission_pool, front_utility_pool,
+      back_work_pool, back_transmission_pool, back_utility_pool)
+
+  link = in_memory.Link(link_pool)
+  front = implementations.front_link(
+      front_work_pool, front_transmission_pool, front_utility_pool)
+  back = implementations.back_link(
+      servicer, back_work_pool, back_transmission_pool, back_utility_pool,
+      default_timeout, _MAXIMUM_TIMEOUT)
+  front.join_rear_link(link)
+  link.join_fore_link(front)
+  back.join_fore_link(link)
+  link.join_rear_link(back)
+
+  return _LinkedPair(front, back, pools)