// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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.
#pragma once

#include <memory>

#include "kudu/gutil/ref_counted.h"
#include "kudu/util/status.h"

namespace kudu {
namespace rpc {

class RemoteMethod;
struct RpcMethodInfo;
class InboundCall;

class RpcService : public RefCountedThreadSafe<RpcService> {
 public:
  virtual ~RpcService() {}

  // Enqueue a call for processing.
  // On failure, the RpcService::QueueInboundCall() implementation is
  // responsible for responding to the client with a failure message.
  virtual Status QueueInboundCall(std::unique_ptr<InboundCall> call) = 0;

  // Look up RPC method information.
  //
  // If this returns nullptr, then certain functionality like
  // metrics collection will not be performed for this call.
  virtual RpcMethodInfo* LookupMethod(const RemoteMethod& method) = 0;
};

} // namespace rpc
} // namespace kudu