service_config_channel_arg_filter.cc

//
// Copyright 2020 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.
//

// This filter reads GRPC_ARG_SERVICE_CONFIG and populates ServiceConfigCallData
// in the call context per call for direct channels.

#include <grpc/support/port_platform.h>

#include <new>
#include <string>
#include <utility>

#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "absl/types/optional.h"

#include <grpc/grpc.h>
#include <grpc/support/log.h>

#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/channel/channel_fwd.h"
#include "src/core/lib/channel/channel_stack.h"
#include "src/core/lib/channel/channel_stack_builder.h"
#include "src/core/lib/channel/context.h"
#include "src/core/lib/config/core_configuration.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/iomgr/closure.h"
#include "src/core/lib/iomgr/error.h"
#include "src/core/lib/service_config/service_config.h"
#include "src/core/lib/service_config/service_config_call_data.h"
#include "src/core/lib/service_config/service_config_impl.h"
#include "src/core/lib/service_config/service_config_parser.h"
#include "src/core/lib/surface/channel_init.h"
#include "src/core/lib/surface/channel_stack_type.h"

namespace grpc_core {

namespace {

class ServiceConfigChannelArgChannelData { … };

class ServiceConfigChannelArgCallData { … };

grpc_error_handle ServiceConfigChannelArgInitCallElem(
    grpc_call_element* elem, const grpc_call_element_args* args) { … }

void ServiceConfigChannelArgDestroyCallElem(
    grpc_call_element* elem, const grpc_call_final_info* /* final_info */,
    grpc_closure* /* then_schedule_closure */) { … }

grpc_error_handle ServiceConfigChannelArgInitChannelElem(
    grpc_channel_element* elem, grpc_channel_element_args* args) { … }

void ServiceConfigChannelArgDestroyChannelElem(grpc_channel_element* elem) { … }

const grpc_channel_filter ServiceConfigChannelArgFilter = …;

}  // namespace

void RegisterServiceConfigChannelArgFilter(
    CoreConfiguration::Builder* builder) { … }

}  // namespace grpc_core
chromium/third_party/grpc/src/src/core/ext/filters/client_channel/service_config_channel_arg_filter.cc
