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

//
// Copyright 2018 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_CHILD_POLICY_HANDLER_H
#define GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_CHILD_POLICY_HANDLER_H
#include <grpc/support/port_platform.h>

#include <utility>

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

#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/debug/trace.h"
#include "src/core/lib/gprpp/orphanable.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/load_balancing/lb_policy.h"

namespace grpc_core {

// A class that makes it easy to gracefully switch child policies.
//
// Callers should instantiate this instead of using
// CoreConfiguration::Get().lb_policy_registry().CreateLoadBalancingPolicy().
// Once instantiated, this object will automatically take care of constructing
// the child policy as needed upon receiving an update.
class ChildPolicyHandler : public LoadBalancingPolicy { … };

}  // namespace grpc_core

#endif  // GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_CHILD_POLICY_HANDLER_H