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# 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.
cimport cpython
cdef class Channel:
def __cinit__(self, target, ChannelArgs arguments=None,
ChannelCredentials channel_credentials=None):
cdef grpc_channel_args *c_arguments = NULL
cdef char *c_target = NULL
self.c_channel = NULL
self.references = []
if arguments is not None:
c_arguments = &arguments.c_args
if isinstance(target, bytes):
pass
elif isinstance(target, basestring):
target = target.encode()
else:
raise TypeError("expected target to be str or bytes")
c_target = target
if channel_credentials is None:
with nogil:
self.c_channel = grpc_insecure_channel_create(c_target, c_arguments,
NULL)
else:
with nogil:
self.c_channel = grpc_secure_channel_create(
channel_credentials.c_credentials, c_target, c_arguments, NULL)
self.references.append(channel_credentials)
self.references.append(target)
self.references.append(arguments)
def create_call(self, Call parent, int flags,
CompletionQueue queue not None,
method, host, Timespec deadline not None):
if queue.is_shutting_down:
raise ValueError("queue must not be shutting down or shutdown")
if isinstance(method, bytes):
pass
elif isinstance(method, basestring):
method = method.encode()
else:
raise TypeError("expected method to be str or bytes")
cdef char *method_c_string = method
cdef char *host_c_string = NULL
if host is None:
pass
elif isinstance(host, bytes):
host_c_string = host
elif isinstance(host, basestring):
host = host.encode()
host_c_string = host
else:
raise TypeError("expected host to be str, bytes, or None")
cdef Call operation_call = Call()
operation_call.references = [self, method, host, queue]
cdef grpc_call *parent_call = NULL
if parent is not None:
parent_call = parent.c_call
with nogil:
operation_call.c_call = grpc_channel_create_call(
self.c_channel, parent_call, flags,
queue.c_completion_queue, method_c_string, host_c_string,
deadline.c_time, NULL)
return operation_call
def check_connectivity_state(self, bint try_to_connect):
cdef grpc_connectivity_state result
with nogil:
result = grpc_channel_check_connectivity_state(self.c_channel,
try_to_connect)
return result
def watch_connectivity_state(
self, grpc_connectivity_state last_observed_state,
Timespec deadline not None, CompletionQueue queue not None, tag):
cdef OperationTag operation_tag = OperationTag(tag)
cpython.Py_INCREF(operation_tag)
with nogil:
grpc_channel_watch_connectivity_state(
self.c_channel, last_observed_state, deadline.c_time,
queue.c_completion_queue, <cpython.PyObject *>operation_tag)
def target(self):
cdef char *target = NULL
with nogil:
target = grpc_channel_get_target(self.c_channel)
result = <bytes>target
with nogil:
gpr_free(target)
return result
def __dealloc__(self):
if self.c_channel != NULL:
with nogil:
grpc_channel_destroy(self.c_channel)
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