chromium/third_party/grpc/src/src/core/ext/filters/backend_metrics/backend_metric_filter.cc

// Copyright 2023 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.

#include <grpc/support/port_platform.h>

#include "src/core/ext/filters/backend_metrics/backend_metric_filter.h"

#include <inttypes.h>
#include <limits.h>
#include <stddef.h>

#include <functional>
#include <map>
#include <memory>
#include <utility>

#include "absl/strings/string_view.h"
#include "upb/upb.h"
#include "upb/upb.hpp"
#include "xds/data/orca/v3/orca_load_report.upb.h"

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

#include "src/core/ext/filters/client_channel/lb_policy/backend_metric_data.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/debug/trace.h"
#include "src/core/lib/promise/context.h"
#include "src/core/lib/promise/map.h"
#include "src/core/lib/slice/slice.h"
#include "src/core/lib/surface/channel_stack_type.h"
#include "src/core/lib/transport/metadata_batch.h"

namespace grpc_core {

TraceFlag grpc_backend_metric_filter_trace(false, "backend_metric_filter");

absl::optional<std::string> BackendMetricFilter::MaybeSerializeBackendMetrics(
    BackendMetricProvider* provider) const { … }

const grpc_channel_filter BackendMetricFilter::kFilter = …;

absl::StatusOr<BackendMetricFilter> BackendMetricFilter::Create(
    const ChannelArgs&, ChannelFilter::Args) { … }

ArenaPromise<ServerMetadataHandle> BackendMetricFilter::MakeCallPromise(
    CallArgs call_args, NextPromiseFactory next_promise_factory) { … }

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

}  // namespace grpc_core