chromium/third_party/grpc/src/src/core/ext/filters/client_channel/lb_policy/oob_backend_metric_internal.h

//
// Copyright 2022 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_LB_POLICY_OOB_BACKEND_METRIC_INTERNAL_H
#define GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_OOB_BACKEND_METRIC_INTERNAL_H

#include <grpc/support/port_platform.h>

#include <memory>
#include <set>
#include <utility>

#include "absl/base/thread_annotations.h"
#include "absl/strings/string_view.h"

#include <grpc/impl/connectivity_state.h>

#include "src/core/ext/filters/client_channel/lb_policy/backend_metric_data.h"
#include "src/core/ext/filters/client_channel/lb_policy/oob_backend_metric.h"
#include "src/core/ext/filters/client_channel/subchannel.h"
#include "src/core/ext/filters/client_channel/subchannel_interface_internal.h"
#include "src/core/ext/filters/client_channel/subchannel_stream_client.h"
#include "src/core/lib/gprpp/orphanable.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/gprpp/sync.h"
#include "src/core/lib/gprpp/time.h"
#include "src/core/lib/gprpp/unique_type_name.h"

namespace grpc_core {

class OrcaWatcher;

// This producer is registered with a subchannel.  It creates a
// streaming ORCA call and reports the resulting backend metrics to all
// registered watchers.
class OrcaProducer : public Subchannel::DataProducerInterface { … };

// This watcher is returned to the LB policy and added to the
// client channel SubchannelWrapper.
class OrcaWatcher : public InternalSubchannelDataWatcherInterface { … };

}  // namespace grpc_core

#endif  // GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_OOB_BACKEND_METRIC_INTERNAL_H