Update mojo sdk to rev f84766d3b6420b7cf6a113d9d65d73cb5fe18d90

third_party/mojo/src/mojo/public/python/mojo_bindings/reflection.py

Index: third_party/mojo/src/mojo/public/python/mojo_bindings/reflection.py
diff --git a/third_party/mojo/src/mojo/public/python/mojo_bindings/reflection.py b/third_party/mojo/src/mojo/public/python/mojo_bindings/reflection.py
index e41601a6d0c8960e06e0049f94fbe0d28d7c2fe1..6c4767b7b6f0146bb9bea5e39214b394064a9996 100644
--- a/third_party/mojo/src/mojo/public/python/mojo_bindings/reflection.py
+++ b/third_party/mojo/src/mojo/public/python/mojo_bindings/reflection.py
@@ -5,14 +5,9 @@
 """The metaclasses used by the mojo python bindings."""
 
 import itertools
-import logging
-import sys
 
 # pylint: disable=F0401
-import mojo_bindings.messaging as messaging
-import mojo_bindings.promise as promise
 import mojo_bindings.serialization as serialization
-import mojo_system
 
 
 class MojoEnumType(type):
@@ -140,79 +135,6 @@ class MojoStructType(type):
     raise AttributeError('can\'t delete attribute')
 
 
-class MojoInterfaceType(type):
-  """Meta class for interfaces.
-
-  Usage:
-    class MyInterface(object):
-      __metaclass__ = MojoInterfaceType
-      DESCRIPTOR = {
-        'methods': [
-          {
-            'name': 'FireAndForget',
-            'ordinal': 0,
-            'parameters': [
-              SingleFieldGroup('x', _descriptor.TYPE_INT32, 0, 0),
-            ]
-          },
-          {
-            'name': 'Ping',
-            'ordinal': 1,
-            'parameters': [
-              SingleFieldGroup('x', _descriptor.TYPE_INT32, 0, 0),
-            ],
-            'responses': [
-              SingleFieldGroup('x', _descriptor.TYPE_INT32, 0, 0),
-            ],
-          },
-        ],
-      }
-  """
-
-  def __new__(mcs, name, bases, dictionary):
-    # If one of the base class is already an interface type, do not edit the
-    # class.
-    for base in bases:
-      if isinstance(base, mcs):
-        return type.__new__(mcs, name, bases, dictionary)
-
-    descriptor = dictionary.pop('DESCRIPTOR', {})
-
-    methods = [_MethodDescriptor(x) for x in descriptor.get('methods', [])]
-    for method in methods:
-      dictionary[method.name] = _NotImplemented
-    fully_qualified_name = descriptor['fully_qualified_name']
-
-    interface_manager = InterfaceManager(fully_qualified_name, methods)
-    dictionary.update({
-        'manager': None,
-        '_interface_manager': interface_manager,
-    })
-
-    interface_class = type.__new__(mcs, name, bases, dictionary)
-    interface_manager.interface_class = interface_class
-    return interface_class
-
-  @property
-  def manager(cls):
-    return cls._interface_manager
-
-  # Prevent adding new attributes, or mutating constants.
-  def __setattr__(cls, key, value):
-    raise AttributeError('can\'t set attribute')
-
-  # Prevent deleting constants.
-  def __delattr__(cls, key):
-    raise AttributeError('can\'t delete attribute')
-
-
-class InterfaceProxy(object):
-  """
-  A proxy allows to access a remote interface through a message pipe.
-  """
-  pass
-
-
 class InterfaceRequest(object):
   """
   An interface request allows to send a request for an interface to a remote
@@ -234,174 +156,11 @@ class InterfaceRequest(object):
     type(impl).manager.Bind(impl, self.PassMessagePipe())
 
 
-class InterfaceManager(object):
-  """
-  Manager for an interface class. The manager contains the operation that allows
-  to bind an implementation to a pipe, or to generate a proxy for an interface
-  over a pipe.
-  """
-
-  def __init__(self, name, methods):
-    self.name = name
-    self.methods = methods
-    self.interface_class = None
-    self._proxy_class = None
-    self._stub_class = None
-
-  def Proxy(self, handle):
-    router = messaging.Router(handle)
-    error_handler = _ProxyErrorHandler()
-    router.SetErrorHandler(error_handler)
-    router.Start()
-    return self._InternalProxy(router, error_handler)
-
-  # pylint: disable=W0212
-  def Bind(self, impl, handle):
-    router = messaging.Router(handle)
-    router.SetIncomingMessageReceiver(self._Stub(impl))
-    error_handler = _ProxyErrorHandler()
-    router.SetErrorHandler(error_handler)
-
-    # Retain the router, until an error happen.
-    retainer = _Retainer(router)
-    def Cleanup(_):
-      retainer.release()
-    error_handler.AddCallback(Cleanup)
-
-    # Give an instance manager to the implementation to allow it to close
-    # the connection.
-    impl.manager = InstanceManager(router, error_handler)
-
-    router.Start()
-
-  def NewRequest(self):
-    pipe = mojo_system.MessagePipe()
-    return (self.Proxy(pipe.handle0), InterfaceRequest(pipe.handle1))
-
-  def _InternalProxy(self, router, error_handler):
-    if error_handler is None:
-      error_handler = _ProxyErrorHandler()
-
-    if not self._proxy_class:
-      dictionary = {
-        '__module__': __name__,
-        '__init__': _ProxyInit,
-      }
-      for method in self.methods:
-        dictionary[method.name] = _ProxyMethodCall(method)
-      self._proxy_class = type('%sProxy' % self.name,
-                               (self.interface_class, InterfaceProxy),
-                               dictionary)
-
-    proxy = self._proxy_class(router, error_handler)
-    # Give an instance manager to the proxy to allow to close the connection.
-    proxy.manager = InstanceManager(router, error_handler)
-    return proxy
-
-  def _Stub(self, impl):
-    if not self._stub_class:
-      accept_method = _StubAccept(self.methods)
-      dictionary = {
-        '__module__': __name__,
-        '__init__': _StubInit,
-        'Accept': accept_method,
-        'AcceptWithResponder': accept_method,
-      }
-      self._stub_class = type('%sStub' % self.name,
-                              (messaging.MessageReceiverWithResponder,),
-                              dictionary)
-    return self._stub_class(impl)
-
-
-class InstanceManager(object):
+class InterfaceProxy(object):
   """
-  Manager for the implementation of an interface or a proxy. The manager allows
-  to control the connection over the pipe.
+  A proxy allows to access a remote interface through a message pipe.
   """
-  def __init__(self, router, error_handler):
-    self._router = router
-    self._error_handler = error_handler
-    assert self._error_handler is not None
-
-  def Close(self):
-    self._error_handler.OnClose()
-    self._router.Close()
-
-  def PassMessagePipe(self):
-    self._error_handler.OnClose()
-    return self._router.PassMessagePipe()
-
-  def AddOnErrorCallback(self, callback):
-    self._error_handler.AddCallback(lambda _: callback(), False)
-
-
-class _MethodDescriptor(object):
-  def __init__(self, descriptor):
-    self.name = descriptor['name']
-    self.ordinal = descriptor['ordinal']
-    self.parameters_struct = _ConstructParameterStruct(
-        descriptor['parameters'], self.name, "Parameters")
-    self.response_struct = _ConstructParameterStruct(
-        descriptor.get('responses'), self.name, "Responses")
-
-
-def _ConstructParameterStruct(descriptor, name, suffix):
-  if descriptor is None:
-    return None
-  parameter_dictionary = {
-    '__metaclass__': MojoStructType,
-    '__module__': __name__,
-    'DESCRIPTOR': descriptor,
-  }
-  return MojoStructType(
-      '%s%s' % (name, suffix),
-      (object,),
-      parameter_dictionary)
-
-
-class _ProxyErrorHandler(messaging.ConnectionErrorHandler):
-  def __init__(self):
-    messaging.ConnectionErrorHandler.__init__(self)
-    self._callbacks = dict()
-
-  def OnError(self, result):
-    if self._callbacks is None:
-      return
-    exception = messaging.MessagingException('Mojo error: %d' % result)
-    for (callback, _) in self._callbacks.iteritems():
-      callback(exception)
-    self._callbacks = None
-
-  def OnClose(self):
-    if self._callbacks is None:
-      return
-    exception = messaging.MessagingException('Router has been closed.')
-    for (callback, call_on_close) in self._callbacks.iteritems():
-      if call_on_close:
-        callback(exception)
-    self._callbacks = None
-
-  def AddCallback(self, callback, call_on_close=True):
-    if self._callbacks is not None:
-      self._callbacks[callback] = call_on_close
-
-  def RemoveCallback(self, callback):
-    if self._callbacks:
-      del self._callbacks[callback]
-
-
-class _Retainer(object):
-
-  # Set to force instances to be retained.
-  _RETAINED = set()
-
-  def __init__(self, retained):
-    self._retained = retained
-    _Retainer._RETAINED.add(self)
-
-  def release(self):
-    self._retained = None
-    _Retainer._RETAINED.remove(self)
+  pass
 
 
 def _StructInit(fields):
@@ -452,116 +211,3 @@ def _StructEq(fields):
 
 def _StructNe(self, other):
   return not self.__eq__(other)
-
-
-def _ProxyInit(self, router, error_handler):
-  self._router = router
-  self._error_handler = error_handler
-
-
-# pylint: disable=W0212
-def _ProxyMethodCall(method):
-  flags = messaging.NO_FLAG
-  if method.response_struct:
-    flags = messaging.MESSAGE_EXPECTS_RESPONSE_FLAG
-  def _Call(self, *args, **kwargs):
-    def GenerationMethod(resolve, reject):
-      message = _GetMessage(method, flags, *args, **kwargs)
-      if method.response_struct:
-        def Accept(message):
-          try:
-            assert message.header.message_type == method.ordinal
-            payload = message.payload
-            response = method.response_struct.Deserialize(
-                serialization.RootDeserializationContext(payload.data,
-                                                         payload.handles))
-            as_dict = response.AsDict()
-            if len(as_dict) == 1:
-              value = as_dict.values()[0]
-              if not isinstance(value, dict):
-                response = value
-            resolve(response)
-            return True
-          except Exception as e:
-            # Adding traceback similarly to python 3.0 (pep-3134)
-            e.__traceback__ = sys.exc_info()[2]
-            reject(e)
-            return False
-          finally:
-            self._error_handler.RemoveCallback(reject)
-
-        self._error_handler.AddCallback(reject)
-        if not self._router.AcceptWithResponder(
-            message, messaging.ForwardingMessageReceiver(Accept)):
-          self._error_handler.RemoveCallback(reject)
-          reject(messaging.MessagingException("Unable to send message."))
-      else:
-        if (self._router.Accept(message)):
-          resolve(None)
-        else:
-          reject(messaging.MessagingException("Unable to send message."))
-    return promise.Promise(GenerationMethod)
-  return _Call
-
-
-def _GetMessage(method, flags, *args, **kwargs):
-  if flags == messaging.MESSAGE_IS_RESPONSE_FLAG:
-    struct = method.response_struct(*args, **kwargs)
-  else:
-    struct = method.parameters_struct(*args, **kwargs)
-  header = messaging.MessageHeader(method.ordinal, flags)
-  data = header.Serialize()
-  (payload, handles) = struct.Serialize()
-  data.extend(payload)
-  return messaging.Message(data, handles, header)
-
-
-def _StubInit(self, impl):
-  self.impl = impl
-
-
-def _StubAccept(methods):
-  methods_by_ordinal = dict((m.ordinal, m) for m in methods)
-  def Accept(self, message, responder=None):
-    try:
-      header = message.header
-      assert header.expects_response == bool(responder)
-      assert header.message_type in methods_by_ordinal
-      method = methods_by_ordinal[header.message_type]
-      payload = message.payload
-      parameters = method.parameters_struct.Deserialize(
-          serialization.RootDeserializationContext(
-              payload.data, payload.handles)).AsDict()
-      response = getattr(self.impl, method.name)(**parameters)
-      if header.expects_response:
-        @promise.async
-        def SendResponse(response):
-          if isinstance(response, dict):
-            response_message = _GetMessage(method,
-                                           messaging.MESSAGE_IS_RESPONSE_FLAG,
-                                           **response)
-          else:
-            response_message = _GetMessage(method,
-                                           messaging.MESSAGE_IS_RESPONSE_FLAG,
-                                           response)
-          response_message.header.request_id = header.request_id
-          return responder.Accept(response_message)
-        p = SendResponse(response)
-        if self.impl.manager:
-          # Close the connection in case of error.
-          p.Catch(lambda _: self.impl.manager.Close())
-      return True
-    # pylint: disable=W0702
-    except:
-      # Close the connection in case of error.
-      logging.warning(
-          'Error occured in accept method. Connection will be closed.')
-      logging.debug("Exception", exc_info=True)
-      if self.impl.manager:
-        self.impl.manager.Close()
-      return False
-  return Accept
-
-
-def _NotImplemented(*_1, **_2):
-  raise NotImplementedError()