chromium/third_party/grpc/src/src/core/ext/filters/client_channel/config_selector.h

//
// 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.
//

#ifndef GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CONFIG_SELECTOR_H
#define GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CONFIG_SELECTOR_H

#include <grpc/support/port_platform.h>

#include <string.h>

#include <utility>
#include <vector>

#include "absl/status/statusor.h"
#include "absl/strings/string_view.h"

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

#include "src/core/lib/channel/channel_fwd.h"
#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/gprpp/ref_counted.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/resource_quota/arena.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_parser.h"
#include "src/core/lib/slice/slice.h"
#include "src/core/lib/transport/metadata_batch.h"

// Channel arg key for ConfigSelector.
#define GRPC_ARG_CONFIG_SELECTOR …

namespace grpc_core {

// Internal API used to allow resolver implementations to override
// MethodConfig and provide input to LB policies on a per-call basis.
class ConfigSelector : public RefCounted<ConfigSelector> { … };

// Default ConfigSelector that gets the MethodConfig from the service config.
class DefaultConfigSelector : public ConfigSelector { … };

}  // namespace grpc_core

#endif  // GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CONFIG_SELECTOR_H